Matlab 2d matrix

pgon = polyshape (P) creates a polyshape from the 2-D vertices defined in the N -by-2 matrix P, where N is the number of vertices. The first column of P defines the x -coordinates, and the second column defines the y -coordinates. example. pgon = polyshape (X,Y) , where X and Y are 1-by- M cell arrays of vectors for the x - and y -coordinates ...

Compute 2-D Standard Deviation. Read a grayscale image into the workspace, then calculate the standard deviation of the pixel intensity values. I = imread ( 'liftingbody.png' ); val = std2 (I) val = 31.6897.Add a 2D matrix to a 3D matrix in a specific... Learn more about matrix MATLAB Say I have 2 Matrices A = 10x10x10 B = 10x10 I want to ad B to A at a certain dimension e.g. (:,:,6) such that A becomes 10x10x11 How can I do this?The square root function in MATLAB is sqrt(a), where a is a numerical scalar, vector or array. The square root function returns the positive square root b of each element of the argument a, such that b x b = a.I have a 2D matrix, and I want to know the minimum and its indices. I normally use min (min (matrix)), and I found here that I can also use min (matrix (:)). But I couldn't find out how to also get the location of this found minimum? Thanks in advance! Sign in to comment. Sign in to answer this question.Description. example. contourf (Z) creates a filled contour plot containing the isolines of matrix Z, where Z contains height values on the x - y plane. MATLAB ® automatically selects the contour lines to display. The column and row indices of Z are the x and y coordinates in the plane, respectively. contourf (X,Y,Z) specifies the x and y ...Aug 1, 2014 · b = zeros (rows, columns, slices); for slice = 1 : slices. b (:,:, slice) = F (:,:, slice) .* x; % Use dot star, not just star. end. If the number of rows and columns are different you need to make some decisions about exactly where you want to multiply, if one is smaller than the other, or one extends out past the other. B = rot90 (A) rotates array A counterclockwise by 90 degrees. For multidimensional arrays, rot90 rotates in the plane formed by the first and second dimensions. example. B = rot90 (A,k) rotates array A counterclockwise by k*90 degrees, where k is an integer.I will have to find the row number. Say, for i=1:5. for j=1:3. I want to create a 2D matrix with 2 columns, where the entries will be like [i j] How should I write the code? 2 Comments. Show 1 older comment. Sariha Azad on 31 May 2019. I want the iterators as entries, as for i=1:2,for j=1:2, matrix= [1 1;1 2;2 1;2 2]

Bivariate histograms are a type of bar plot for numeric data that group the data into 2-D bins. After you create a Histogram2 object, you can modify aspects of the histogram by changing its property values. This is particularly useful for quickly modifying the properties of the bins or changing the display. M = median (A,vecdim) returns the median based on the dimensions specified in the vector vecdim. For example, if A is a matrix, then median (A, [1 2]) returns the median of all elements in A because every element of a matrix is contained in the array slice defined by dimensions 1 and 2. example. M = median ( ___,missingflag) specifies whether ...A(1,4)=40 A(2,4)=100 Function has to generic for any matrix size. Please let know the function to get the above mentioned data from the matrix. Looking forward to hear from you at the earliest.MATLAB Language Fundamentals Loops and Conditional Statements. Find more on Loops and Conditional Statements in Help Center and File Exchange. Tags nested for loops; Products MATLAB; Community Treasure Hunt. Find the treasures in MATLAB Central and discover how the community can help you!Use griddedInterpolant to interpolate a 1-D data set. Create a vector of scattered sample points v. The points are sampled at random 1-D locations between 0 and 20. x = sort (20*rand (100,1)); v = besselj (0,x); Create a gridded interpolant object for the data. By default, griddedInterpolant uses the 'linear' interpolation method.

If you actually look at the documentation for plot you'll see that if you pass it a matrix, it will plot each column as a separate plot object on the same axes. As such you can simply pass the transpose of your data to plot. % Example data A = magic (10); % Create a plot for each row hplot = plot (A.'); This will plot each signal using the next ...T = array2table(A) converts the m-by-n array, A, to an m-by-n table, T.Each column of A becomes a variable in T.. array2table uses the input array name appended with the column number for the variable names in the table. If these names are not valid MATLAB ® identifiers, array2table uses names of the form 'Var1',...,'VarN', where N is the number of …B = rot90 (A) rotates array A counterclockwise by 90 degrees. For multidimensional arrays, rot90 rotates in the plane formed by the first and second dimensions. example. B = rot90 (A,k) rotates array A counterclockwise by k*90 degrees, where k is an integer.Smooths 2D array data. Ignores NaN's. function matrixOut = smooth2a (matrixIn,Nr,Nc) This function smooths the data in matrixIn using a mean filter over a. rectangle of size (2*Nr+1)-by- (2*Nc+1). Basically, you end up replacing. element "i" by the mean of the rectange centered on "i". Any NaN.

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Jan 5, 2019 · Hello Star Strider this is exactly the concept i was looking for. I tried this and it gave me a single column vector but with reduced number of rows.If you look at the image i posted in the question the output will have equal number of rows when compared to the input.Please let me know if a modified SVD or any other similar concept is capable of …May 3, 2020 · 这篇博客是我对傅里叶变换的概念的复习，并且对Matlab的fft函数进行了分析。这里，重点举例说明了二维傅里叶变换在图像处理中的意义。在实际应用中，通常对信号做离散傅里叶变换。在matlab中，fft对矩阵的处理是取其每列元素的傅里叶变换。Description Vector and Matrix Data example plot (X,Y) creates a 2-D line plot of the data in Y versus the corresponding values in X. To plot a set of coordinates connected by line segments, specify X and Y as vectors of the same length. To plot multiple sets of coordinates on the same set of axes, specify at least one of X or Y as a matrix.A long square bar with cross-sectional dimensions of 30 mm x 30 mm has a specied temperature on each side, The temperatures are: Theme. Copy. Tbottom = 100 C. Ttop = 150 C. Tleft = 250 C. Tright = 300 C. Assuming isothermal surfaces, write a software program to solve the heat equation to determine the two-dimensional steady-state spatial ...

You can apply the 2-D FIR filter to images by using the filter2 function. h = fwind2 (Hd,win) creates a 2-D FIR filter h by using an inverse Fourier transform of the desired frequency response Hd and multiplication by the window win. h = fwind2 (f1,f2,Hd,win) lets you specify the desired frequency response Hd at arbitrary frequencies f1 and f2 ...MATLAB ® treats the array as a single column vector with each column appended to the bottom of the previous column. Thus, linear indexing numbers the elements in the columns from top to bottom, left to right. For example, consider a 3-by-3 matrix. You can reference the A(2,2) element with A(5), and the A(2,3) element with A(8).An alternative to sortrows (), which can be applied to broader scenarios. save the sorting indices of the row/column you want to order by: [~,idx]=sort (data (:,1)); reorder all the rows/columns according to the previous sorted indices. data=data (idx,:) Share. Improve this …I understand that you wish to know how to compute the radial average for a 2D matrix. Please refer to the MATLAB script in the File Exchange submission link below which calculates the radial average of a 2D matrix: Radial Average. I hope this helps resolve the issue. Thanks, TusharThis MATLAB function approximates the integral of the function z = fun(x,y) over the planar region xmin ≤ x ≤ xmax and ymin(x) ≤ y ≤ ymax(x). ... "MATLAB Program for Quadrature in 2D." Applied Mathematics and Computation. Vol. 202, Issue 1, 2008, pp. 266–274. ... Function handles that return sparse matrix output are not supported ...A matrix is a two-dimensional array often used for linear algebra. Array Creation To create an array with four elements in a single row, separate the elements …The MATLAB environment uses the term matrix to indicate a variable containing real or complex numbers arranged in a two-dimensional grid. An array is, more generally, a …So I already have an already existing matrix/array given the command code: Theme. Copy. C=randi ( [-10,10],4,4) %that will give me a 4x4 of ten random integers. Now using the matrix/array that I have from C, how would I add an extra dimension/layer of all 0's that would make the matrix now a 4x4x2. Again, the added dimension/layer would …Copy. out = reshape (your_matrix,size_of_your_new_3D_matrix) 7 Comments. Show 6 older comments. Guillaume on 6 Mar 2018. You have yet to explain what any of these numbers represent so we have absolutely no idea how to convert your 2D matrix to 3D. You really really really need to explain a lot better what it is you want.Sep 18, 2023 · In MATLAB, the basic type, even for scalars, is a multidimensional array. Array assignments in MATLAB are stored as 2D arrays of double precision floating point numbers, unless you specify the number of dimensions and type. Operations on the 2D instances of these arrays are modeled on matrix operations in linear algebra.Description. example. contourf (Z) creates a filled contour plot containing the isolines of matrix Z, where Z contains height values on the x - y plane. MATLAB ® automatically selects the contour lines to display. The column and row indices of Z are the x and y coordinates in the plane, respectively. contourf (X,Y,Z) specifies the x and y ...

Aug 1, 2014 · b = zeros (rows, columns, slices); for slice = 1 : slices. b (:,:, slice) = F (:,:, slice) .* x; % Use dot star, not just star. end. If the number of rows and columns are different you need to make some decisions about exactly where you want to multiply, if one is smaller than the other, or one extends out past the other.

Learn more about plot, 3d plots, multidimensional array MATLAB Hi! a = rand(10); % matrix b = repmat(a, 1, 1, 5); % makes multiple copies of your matrix in 3rd dimension I used this two lines of code to generate a 3rd dimension of my original matrix.Apr 7, 2010 · The reshape function changes the size and shape of an array. For example, reshape a 3-by-4 matrix to a 2-by-6 matrix. A = [1 4 7 10; 2 5 8 11; 3 6 9 12] A = 3×4 1 4 7 10 2 5 8 11 3 6 9 12. B = reshape (A,2,6) B = 2×6 1 3 5 7 9 11 2 4 6 8 10 12. As long as the number of elements in each shape are the same, you can reshape them into an array ... Add a 2D matrix to a 3D matrix in a specific... Learn more about matrix MATLAB Say I have 2 Matrices A = 10x10x10 B = 10x10 I want to ad B to A at a certain dimension e.g. (:,:,6) such that A becomes 10x10x11 How can I do this?S = std (A) returns the standard deviation of the elements of A along the first array dimension whose size is greater than 1. By default, the standard deviation is normalized by N-1, where N is the number of observations. If A is a vector of observations, then S is a scalar. If A is a matrix whose columns are random variables and whose rows are ... Create matrix C. Display an image of the data in C. Add a colorbar to the graph to show the current colormap. C = [0 2 4 6; 8 10 12 14; 16 18 20 22]; image (C) colorbar. By default, the CDataMapping property for the image is set to 'direct' so image interprets values in C as indices into the colormap. A pseudocolor plot displays matrix data as an array of colored cells (known as faces ). MATLAB ® creates this plot as a flat surface in the x - y plane. The surface is defined by a grid of x - and y -coordinates that correspond to the corners (or vertices) of the faces. The grid covers the region X=1:n and Y=1:m, where [m,n] = size (C). [X,Y] = meshgrid(x,y) returns 2-D grid coordinates based on the coordinates contained in vectors x and y. X is a matrix where each row is a copy of x, and Y is a matrix where each column is a copy of y.The grid …

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From MatLab documentation: ZI = interp2(X,Y,Z,XI,YI) returns matrix ZI containing elements corresponding to the elements of XI and YI and determined by interpolation within the two-dimensional function specified by matrices X, Y, and Z. X and Y must be monotonic, and have the same format ("plaid") as if they were produced by meshgrid.A pseudocolor plot displays matrix data as an array of colored cells (known as faces ). MATLAB ® creates this plot as a flat surface in the x - y plane. The surface is defined by a grid of x - and y -coordinates that correspond to the corners (or vertices) of the faces. The grid covers the region X=1:n and Y=1:m, where [m,n] = size (C).Description. M = min (A) returns the minimum elements of an array. If A is a matrix, then min (A) is a row vector containing the minimum value of each column of A. If A is a multidimensional array, then min (A) operates along the first dimension of A whose size is greater than 1, treating the elements as vectors.A one-dimensional array stores a single list of various elements having a similar data type. A two-dimensional array stores an array of various arrays, or a ...I have a matrix of, say: size P = zeros(2,2,100); Let's try to plot the first element of each of these matrices, like this: plot(1:1:100, P(1,1,:)) This does not work. What is the proper way to... Stack Overflow. About; ... How to plot a 2D plot in MATlab from Three Matrices and an array? 0. Plotting the cell array in MATLAB.(right now it takes about 8-10 sec to run on 1920*1080 size matrix and i need to produce 173,340 2d gaussian functions images which is too much time...) thanks in advance for any help. this is my current code: function mat ... if you ask specific questions about MATLAB then there is a possibility that someone might answer in the next few …This example shows basic techniques for creating arrays and matrices using MATLAB. Matrices and arrays are the fundamental representation of information and data in MATLAB. To create an array with multiple elements in a single row, separate the elements with either a comma ',' or a space. This type of array is called a row vector.This MATLAB function returns interpolated values of a function of two variables at specific query points using linear interpolation.Theme. Copy. array (i,j) = value; Matt Tearle on 28 Dec 2011. That. And if you want to preallocate space (which you should, if you have arrays that may grow significantly in loops): array = zeros (m,n);How can I load to matlab workspace multiple matrices with the same dimension located in individual csv files? They have different file names with the same extension (.csv) Expected variable in workspace: A 3D matrix .Bivariate histograms are a type of bar plot for numeric data that group the data into 2-D bins. After you create a Histogram2 object, you can modify aspects of the histogram by changing its property values. This is particularly useful for quickly modifying the properties of the bins or changing the display.How do you make a 2-d array in Matlab? Ask Question Asked 13 years, 7 months ago Modified 13 years, 7 months ago Viewed 54k times 4 I want to make a 2D array dij (i and j are subscripts). I want to be able to do dij = di,j-1+ (di,j-1 - di-1,dj-1)/ (4^j-1) My idea for this it to make to 1D arrays and then combine them into a 2D array. ….

I do know that it can be done something like this: for example A is of 3000x64x278 matrix so I can call its first matrix as. Theme. Copy. B=A (:,:,1); to change it into 3000*64 that means every column under one column I can do. Theme. Copy. B=B (:);May 3, 2013 · From MatLab documentation: ZI = interp2(X,Y,Z,XI,YI) returns matrix ZI containing elements corresponding to the elements of XI and YI and determined by interpolation within the two-dimensional function specified by matrices X, Y, and Z. X and Y must be monotonic, and have the same format ("plaid") as if they were produced by meshgrid. Accepted Answer: KSSV. I have to create a 2D matrix, where the row number is unknown. I will have to find the row number. Say, for i=1:5.M = median (A,vecdim) returns the median based on the dimensions specified in the vector vecdim. For example, if A is a matrix, then median (A, [1 2]) returns the median of all elements in A because every element of a matrix is contained in the array slice defined by dimensions 1 and 2. example. M = median ( ___,missingflag) specifies whether ...If you have an existing 2D matrix, you can assign an element in the "3rd dimension" and the matrix is augmented to contain the new element. All other new matrix elements that have to be added to do that are set to zero. For example. B = magic(3); %# creates a 3x3 magic square B(2,1,2) = 1; %# and you have a 3x3x2 arrayI do know that it can be done something like this: for example A is of 3000x64x278 matrix so I can call its first matrix as. Theme. Copy. B=A (:,:,1); to change it into 3000*64 that means every column under one column I can do. Theme. Copy. B=B (:);I will have to find the row number. Say, for i=1:5. for j=1:3. I want to create a 2D matrix with 2 columns, where the entries will be like [i j] How should I write the code? 2 Comments. Show 1 older comment. Sariha Azad on 31 May 2019. I want the iterators as entries, as for i=1:2,for j=1:2, matrix= [1 1;1 2;2 1;2 2]B = flipud(A) returns A with its rows flipped in the up-down direction (that is, about a horizontal axis).If A is a column vector, then flipud(A) returns a vector of the same length with the order of its elements reversed. If A is a row vector, then flipud(A) simply returns A.For multidimensional arrays, flipud operates on the planes formed by the first and …For example, if A is a 3-by-4 matrix, then size(A) returns the vector [3 4]. If A is a table or timetable, then size(A) returns a two-element row vector consisting of the number of rows and the number of table variables. Matlab 2d matrix, If the matrix is square, MATLAB ® plots the columns of the matrix against the vector. Plot two triangular patches with shared x- coordinates. X = [0 0 4]; Y = [0 -0; 2 -2; 0 0]; C = [0 1]; fill(X,Y,C) Two or more patches (X and Y are unique) Specify X and Y as matrices of the same size. MATLAB plots the corresponding columns of the matrices. ..., 0. To Convert a 2D Matrix into a 1D Array ( i.e a row vector), such that row vector is formed by concatenating consecutive rows of the 2D Matrix, use the following Code : Theme. Copy. OneDArray = reshape (TwoDArray', [1 size (TwoDArray,1)*size (TwoDArray,2)]); 2 Comments., h = fspecial ( 'motion', 50, 45); Apply the filter to the original image to create an image with motion blur. Note that imfilter is more memory efficient than some other filtering functions in that it outputs an array of the same data type as the input image array. In this example, the output is an array of uint8., MATLAB then constructs the surface plot by connecting neighboring matrix elements to form a mesh of quadrilaterals. To produce a surface plot from nonuniformly sampled data, use scatteredInterpolant to interpolate the values at uniformly spaced points, and then use mesh and surf in the usual way. Example – Displaying Nonuniform Data on a Surface, I understand that you wish to know how to compute the radial average for a 2D matrix. Please refer to the MATLAB script in the File Exchange submission link below which calculates the radial average of a 2D matrix: Radial Average. I hope this helps resolve the issue. Thanks, Tushar, Dimensions of convolution matrix, specified as a two-element vector of the form [m n], where m is the number of rows and n is the number of columns. Data Types: double Output Arguments, M = median (A,vecdim) returns the median based on the dimensions specified in the vector vecdim. For example, if A is a matrix, then median (A, [1 2]) returns the median of all elements in A because every element of a matrix is contained in the array slice defined by dimensions 1 and 2. example. M = median ( ___,missingflag) specifies whether ..., I want to convert a 2D matrix like A into a 3D matrix. Every slice should be the same content like this: A= [1 2 3;4 5 6;7 8 9]; for i=1:10 B (:,:,i)=A end. I need the same code without a loop, which decrease the speed of the program. In the original code A and i are rather big. matlab. matrix., Select a Web Site. Choose a web site to get translated content where available and see local events and offers. Based on your location, we recommend that you select: ., C = conv2 (A,B) returns the two-dimensional convolution of matrices A and B. C = conv2 (u,v,A) first convolves each column of A with the vector u , and then it convolves each row of the result with the vector v. C = conv2 ( ___,shape) returns a subsection of the convolution according to shape . For example, C = conv2 (A,B,'same') returns the ... , b = zeros (rows, columns, slices); for slice = 1 : slices. b (:,:, slice) = F (:,:, slice) .* x; % Use dot star, not just star. end. If the number of rows and columns are different you need to make some decisions about exactly where you want to multiply, if one is smaller than the other, or one extends out past the other., corr2 supports the generation of C code (requires MATLAB ® Coder™). For more information, see Code Generation for Image Processing . GPU Arrays Accelerate code by running on a graphics processing unit (GPU) using Parallel Computing Toolbox™. , In MATLAB, the basic type, even for scalars, is a multidimensional array. Array assignments in MATLAB are stored as 2D arrays of double precision floating point numbers, unless you specify the number of dimensions and type. Operations on the 2D instances of these arrays are modeled on matrix operations in linear algebra., Theme. Copy. array (i,j) = value; Matt Tearle on 28 Dec 2011. That. And if you want to preallocate space (which you should, if you have arrays that may grow significantly in loops): array = zeros (m,n);, Smooths 2D array data. Ignores NaN's. function matrixOut = smooth2a (matrixIn,Nr,Nc) This function smooths the data in matrixIn using a mean filter over a. rectangle of size (2*Nr+1)-by- (2*Nc+1). Basically, you end up replacing. element "i" by the mean of the rectange centered on "i". Any NaN., This example shows how to create 2-D line plots in MATLAB using the plot function. Create a regularly-spaced vector x from 0 to 2*pi using pi/100 as the increment between elements. Calculate sine for each value in x. Use the figure command to create a new figure and plot command to display result. Label the axes and add a title so that viewers ..., This norm is also called the 2-norm, vector magnitude, or Euclidean length. n = norm (v,p) returns the generalized vector p -norm. n = norm (X) returns the 2-norm or maximum singular value of matrix X , which is approximately max (svd (X)). n = norm (X,p) returns the p -norm of matrix X, where p is 1, 2, or Inf: If p = 1, then n is the maximum ..., Oct 11, 2017 · Copy. B = [2,1,4]; C = A (sub2ind (size (A), 1:3, B)) sub2ind creates the "linear index" from the size of the matrix and the row and column indices. 4 Comments. Show 3 older comments. Jan on 12 Oct 2017. You are welcome. This was one of the most mistiest index mixing I've ever solved in the forums., The expression pi in MATLAB returns the floating point number closest in value to the fundamental constant pi, which is defined as the ratio of the circumference of the circle to its diameter. Note that the MATLAB constant pi is not exactly..., Apr 2, 2013 · 2D map: You can get a 2D map by switching the view property of the figure % 2D map using view figure; surf(Z,'EdgeColor','None'); view(2); ... or treating the values in Z as a matrix, viewing it as a scaled image using imagesc and selecting an appropriate colormap. % using imagesc to view just Z figure; imagesc(Z); colormap jet; , Add to your 2D matrix a new column to store the total cases in each country. (Total cases in a country = active cases + recovered cases+ deaths). Also add a new row for the total active cases, recovered cases and deaths for all countries. Print with appropriate header the 2D matrix as updated (b). The data should be sorted based on the total ..., C = cat (dim,A,B) concatenates B to the end of A along dimension dim when A and B have compatible sizes (the lengths of the dimensions match except for the operating dimension dim ). example. C = cat (dim,A1,A2,…,An) concatenates A1, A2, … , An along dimension dim. You can use the square bracket operator [] to concatenate or append arrays. , I will have to find the row number. Say, for i=1:5. for j=1:3. I want to create a 2D matrix with 2 columns, where the entries will be like [i j] How should I write the code? 2 Comments. Show 1 older comment. Sariha Azad on 31 May 2019. I want the iterators as entries, as for i=1:2,for j=1:2, matrix= [1 1;1 2;2 1;2 2], Use griddedInterpolant to interpolate a 1-D data set. Create a vector of scattered sample points v. The points are sampled at random 1-D locations between 0 and 20. x = sort (20*rand (100,1)); v = besselj (0,x); Create a gridded interpolant object for the data. By default, griddedInterpolant uses the 'linear' interpolation method., General form of 2d matrix indexing: A([list of rows], [list of columns]) The result is the elements in the intersection of the indexed rows and columns. Results will be the elements marked by X: A([2 4], [3 4 5 7]) . . C C C . C R R X X X R X . . C C C . C R R X X X R X Reference and some similar examples: tutorial on MATLAB matrix indexing., Algorithms. When concatenating an empty array to a nonempty array, cat omits the empty array in the output. For example, cat(2,[1 2],[]) returns the row vector [1 2]. If all input arguments are empty and have compatible sizes, then cat returns an empty array whose size is equal to the output size as when the inputs are nonempty. For example, …, Description. M = max (A) returns the maximum elements of an array. If A is a matrix, then max (A) is a row vector containing the maximum value of each column of A. If A is a multidimensional array, then max (A) operates along the first dimension of A whose size is greater than 1, treating the elements as vectors., Sep 15, 2023 · matplotlib.pyplot.matshow #. Display an array as a matrix in a new figure window. The origin is set at the upper left hand corner and rows (first dimension of the array) are displayed horizontally. The aspect ratio of the figure window is that of the array, unless this would make an excessively short or narrow figure., A pseudocolor plot displays matrix data as an array of colored cells (known as faces ). MATLAB ® creates this plot as a flat surface in the x - y plane. The surface is defined by a grid of x - and y -coordinates that correspond to the corners (or vertices) of the faces. The grid covers the region X=1:n and Y=1:m, where [m,n] = size (C). , 1 Answer Sorted by: 4 You need to use two outputs for find: [row,col] = find (A==0) The single output you got was the linear index. This is the element number by counting down the columns e.g. for your matrix these are the linear indices: 1 4 7 10 2 5 8 11 3 6 9 12, Regarding the code I posted above, it turns out to be faster to use a 2D gpuAarray instead of a 3D gpuArray in place of the cell. This allows for a very straighforward selection of the columns and vectorization of the farthest inside loop. More precisely: % generate test data: K = 4000; M = 2; A_cell = cell (1,M); % this is given externally s ..., Data to distribute among bins, specified as separate arguments of vectors, matrices, or multidimensional arrays. X and Y must be the same size.histogram2 treats matrix or multidimensional array data as single column vectors, …, You can apply the 2-D FIR filter to images by using the filter2 function. h = fwind2 (Hd,win) creates a 2-D FIR filter h by using an inverse Fourier transform of the desired frequency response Hd and multiplication by the window win. h = fwind2 (f1,f2,Hd,win) lets you specify the desired frequency response Hd at arbitrary frequencies f1 and f2 ...