Answered
How to muliply non equal vectors with slicing?
A = 1:12; B = 1:4; A = reshape(A,4,[])' ; iwant = A.*B

4 years ago | 0

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Extracting closed contours of streamfunction
Did you try this? https://in.mathworks.com/help/matlab/ref/streamline.html

4 years ago | 0

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how to save variable as txt in a specified location with variable value appearing in the file name
path='c:/users/user/desktop'; filename = [path,filesep,'Gauss',num2str(width),'.txt']; fid = fopen(filename,'w') ; fprintf(fi...

4 years ago | 0

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How to plot 3D filled contour ?
You can plot one level at a time: for i = 1:18 plot(lon,lat,levels(:,:,i)') shading interp drawnow end If you ...

4 years ago | 0

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Index exceeds the number of array elements. Index must not exceed 3.
This error occurs when you try to extract more number of elements then present in the array. A = rand(1,4) ; % 1x4 array A...

4 years ago | 1

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How to downsize image in x and y direction?
Read about imresize. img = imread('img') new_img2 = imresize(img, 1/2); imshow(new_img2)

4 years ago | 0

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Answered
How do I refer to the next y point in a function?
You need to define x as an array, when you sustitue x in the function f, you will get output array y which is of same dimension ...

4 years ago | 1

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Answered
How to make 3d plot to model logistic regression?
a0 = -3.936212854; a1 = 0.140718658; a2 = -0.102108952; m = 100 ; n = 100 ; C = linspace(0, 320,m); P = linspace(0, 0.58,n...

4 years ago | 1

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How do I plot this beam, given the coordinates, distances between the nodes, and the connections, and the lengths of each segment?
Read about delaunayTriangulation. This would be easy to use to plot the shown. https://in.mathworks.com/help/matlab/ref/delaun...

4 years ago | 0

Answered
Making all Elements in Matrix Even.
a=[53, 59, 61, 87] ; iwant = a+mod(a,2)

4 years ago | 0

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Retain all initial even value elements, add all odd values with 1
Hint: Read about mod. If mod(x,2) is 1 then x is odd. mod(4,2) % even number mod(5,2) % odd number

4 years ago | 0

Answered
Find position of the maximum value and then convert the row zeros and the position of the maximum value should become 1. just like in the image attach
A = rand(4) ; [m,n] = size(A) ; B = zeros(m,n) ; [val,i] = max(A,[],2) ; idx = sub2ind(size(A),(1:m)',i) ; B(idx) = ...

4 years ago | 0

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Answered
Size of Q is undefined
You need to define the input variables and then call the function. It seems you are striaght away hitting the f5/ run button so ...

4 years ago | 0

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Answered
How to find the contigous coordinate points between two varaibles datasets and do regression
idx = knnsearch(A(:,1:2),B(:,1:2)) ; B = B(idx,:) ;

4 years ago | 0

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Answered
Simple logical conditional flag column
Simple, Let C1 , C2 be your two columns. C2(C1==1)=1 ; C2(C1==-1)=0 ;

4 years ago | 1

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Problem for doing Monte Carlo Integration
Your y in the ocde is a anonymous function: function_handle with value: @(x)sin(x) You need to input some value into ...

4 years ago | 1

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Answered
How to draw multiple plots in one picture?
subplot(411) plot(rand(100,1)) subplot(412) plot(rand(100,1)) subplot(413) plot(rand(100,1)) subplot(414) plot(rand(100,1...

4 years ago | 1

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Answered
I want to arrange a 1st column of a matrix in descending order an the elements in the row is going to arrange itself according to change of the row of first vector
A= [3 2; 1 4; 2 6] ; [val,idx] = sort(A(:,1),'ascend') A = A(idx,:)

4 years ago | 1

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how to write equation in matlab ?
If x is your series. N = length(x) ; FI = sum(abs(diff(x)))/N ;

4 years ago | 0

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generate heat map based on lat/lon and data value
Let T be your grid... x = T.lon ; y = T.lat ; z = T.err_d ; % Convert the scattered data into grid m = 100 ; % can be...

4 years ago | 1

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Answered
Reading and visualizing netcdf with vectors of differing lengths
If you want to attach the file, you can upload in some cloud spaces (google drive) and share the link here without asking the lo...

4 years ago | 0

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Answered
Unable to perform assignment because the indices on the left side are not compatible with the size of the right side.
The error is clear, you are trying to save more number of elements on the LHS then it is intialized for. Example: A = zeros(3...

4 years ago | 0

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Load Files from folder based on file number
csvFiles = dir('*.csv') ; % you are in the folder where csv files are present N = length(csvFiles) ; for i = 1:N thi...

4 years ago | 0

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Contour plot on a surface plot
A = load('Comsol_surf.txt'); x = A(:,1); y = A(:,2); z = A(:,3); % xg = linspace(min(x),max(x),1000) ; yg = linspace(min(...

4 years ago | 1

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Answered
how to obtain random vector from the defined matrix
c=[1 2 3; 3 4 5;6 7 8;9 10 11;12 13 14;15 16 17]; [m,n] = size(c) idx = randsample(m,1) iwant = c(idx,:)

4 years ago | 1

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Answered
Indexing a sub-variable in Matlab base workspace
This line: [ymin, index] = min(y); Your input to the function min is a structure. min takes an array as input. You need to cha...

4 years ago | 1

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How do I save my values of x each time the loop goes round?
%IC clear x = 1; time = 0; dt = 0.1; %for loop calculating x after 10 iterations xx = zeros(10,1) ; for n = 1:10; k1...

4 years ago | 0

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Answered
PSNR calculation for two photos
You have a inbuilt functions for that: Read here: https://in.mathworks.com/help/images/ref/psnr.html

4 years ago | 0

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joining two timetables to complete the timeseries
You can fill the NaN values using fillmissing. Read about it.

4 years ago | 0

Answered
How to make colormaps like the attached colorbar?
Pick the RGB values of maximum value color you want and pick the RGB values of minimum value color you want to represent. Let ...

4 years ago | 0