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Reading data from .txt files from a folder.
To make debugging unexpected data (sizes, types, values) easier, I usually find it easier to concatenate data after the loop: P...

約3年前 | 0

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Vectorising nested for loops
S = load('data.mat') list = S.list tdat = S.table_data k=0; out0 = struct('idx',[],'count',[],'size',[]); for i = 1:size(...

約3年前 | 1

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Matlab not recognizing 'fit' function
Have you or any third-party function or toolbox made any changes to the MATLAB search path? Call https://www.mathworks.com/help...

約3年前 | 1

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Remove null rows from a structure before converting to table
S = struct('A',{[],[],1},'B',{[],[],2}) X = arrayfun(@(s)any(structfun(@isempty,s)),S); T = struct2table(S(~X))

約3年前 | 0

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readmatrix ignores the first line of the data file
You can specify the RANGE as the starting row: M = readmatrix('sample.txt', 'ConsecutiveDelimitersRule','join', 'Range',1) I n...

約3年前 | 1

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Sort two array in the same way, but only one in size order
"The problem now is that I want the same rows that changed for x should be changed for y. " It is not a problem, because when y...

約3年前 | 1

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Sorting vectors into a 3-D grid efficently
Perhaps something like this. The elements of M need to be valid indices, which you can achieve using basic arithmetic operations...

約3年前 | 1

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Rewriting a file?
https://www.mathworks.com/help/matlab/ref/writelines.html Tip for the future: you are already using READLINES, so scroll right ...

約3年前 | 0

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How can I separate individual years from a timetable?
S = load('DateStamp.mat') T = S.DateStamp [G,Y] = findgroups(T.date.Year); X = arrayfun(@(x)find(x==G), 1:max(G), 'uni',0); ...

約3年前 | 1

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Understanding about stacking in MATLAB
"My query is what does the term stacking indicates..." MATLAB does not use the term "stacking" to refer to these kinds of opera...

約3年前 | 0

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How to rearrange a row vector into a pair wise column vector?
"I am sure there is a nice loop to do this, but I can't find a solution." This is MATLAB, so loops are not required: v = 1:21 ...

約3年前 | 0

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MATLAB poems -- let's hear 'em!
In MATLAB we write lines of code For solving problems, it's our abode With matrices and arrays We handle huge data trays And...

約3年前 | 0

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Replace specific elements in strings
Here are two approaches: A = ["America (New York)"; "America (Manhattan)"; "Italy (Rome)"] B = strrep(strrep(A,' (',' - '),')'...

約3年前 | 0

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Behavior with unspecified output arguments
"Has it always been this way?" Yes. Several MATLAB functions from waaaay back in the past use exactly this feature. For exampl...

約3年前 | 1

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How can I get the return of a constructed function as an array?
That is not how MATLAB works. Your code defines a matrix of zeros, but then you do nothing with that variable and simply replace...

約3年前 | 0

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Vectors of seeming identical length, are supposedly not equal in length, how to fix?
Read the FITGAUSS documentation: https://www.mathworks.com/matlabcentral/fileexchange/7489-fitgauss The order of your input ar...

約3年前 | 0

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Creating an augmented matrix a set of matrices
A = cat(3,[1,3;0,1],[1,1;1,1],[0,0;0,0]); C = num2cell(A,1:2); X = 1+tril(toeplitz(1:numel(C))); C = [{zeros(2)};C(:)]; M = ...

約3年前 | 1

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find the closest datetime
I have a datetime column with the format HH:mm:ss.SSSS and for which I'm loooking for the closest datapoint to a time in a forma...

約3年前 | 0

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How to list all tasks in a table and sum up total time spend on each?
You can do this in just a few lines of code. Don't fight MATLAB with multiple nested loops! The data would be so much easier to...

約3年前 | 2

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How to put value from one matrix into another matrix
A = [3:42;rand(1,40)].' B = [6,45,18,24,33;5,12,17,23,32;4,11,16,22,31;3,10,15,21,30] R = nan(size(B)); [X,Y] = ismember(B,A(...

約3年前 | 0

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How to find the order of the power of A matrix?
A = [1,0,1;1,1,0;1,0,0]; B = A; for n = 2:5 B = mod(B*A,2); if isequal(B,eye(3)) break end end n B

約3年前 | 1

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How to loop over a structure in matlab
As far as I can tell, this is your data structure (for simplicity I will define only two field Names, but the code works for any...

約3年前 | 0

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Rebuilding a 3D matrix
A1 = A(:,:,[2,5,7]); A2 = A(:,:,[1,6,10]); A3 = A(:,:,[3,4,8,9]); .. change values B = nan(10,10,10); B(:,:,[2,5,7]) = A1; ...

約3年前 | 1

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How to save a vector from each iteration in a loop in a matrix?
Take a closer look at your preallocation. What does SIZE(..) return?: size(230,300) so your preallcoation zeros(size(230,300)...

約3年前 | 1

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Cropping several images inside a for delivers empty cells
for K=1:10 % <- uppercase I_{k}=imcrop(I{k},RECT); end % ^ lowercase ^ MATLAB is case-sensitive, so you need to make th...

約3年前 | 0

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Reorganization of data in matrix
You could DOWNLOAD Jos' excellent PADCAT: https://www.mathworks.com/matlabcentral/fileexchange/22909-padcat and use it somethi...

約3年前 | 0

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How to extract the months from a datetime table?
S = load('DateStamp.mat') T = S.DateStamp; T.month = T.date; T.month.Format = 'MMMM' But I am guessing that your actual goal...

約3年前 | 1

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How to save results matrix in multi dimensional matrix?
In general with MATLAB it is easier (even if more verbose) to iterate over indices rather than over data. For example: tV = 25...

約3年前 | 0

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How to read a specially structured data file
fid = fopen('test.txt','rt'); mat = fscanf(fid,'%f',[19,Inf]).'; fclose(fid); display(mat)

約3年前 | 2

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How can I convert log(-1) to complex number
log10(-1)

約3年前 | 0

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