Answered
Hi, I want to speed up my script with double loop.
X = permute(A,[3,2,1]) + permute(B,[2,3,1]) The data arrangement in memory is not optimal for that operation. Use BSXFUN for ve...

4 months ago | 1

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Answered
How to replace exact char in a cell array from another reference cell array
This is difficult because 'x1' is also a substring of 'x10'. But making a few assumptions it might be possible: A = {'x1', 'x10...

4 months ago | 1

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Answered
Merge two matrices taking non-Null values
A = [8,8,8,8,NaN;32,32,25,31,NaN;56,56,43,53,NaN;81,80,60,76,NaN;105,103,78,99,NaN;129,127,95,122,NaN]; B = [8,NaN,8,8,8;32,NaN...

4 months ago | 1

Answered
Dynamically Make a Variable Name
This is MATLAB so the best solution is to use indexing, just as the MATLAB documentation shows: https://www.mathworks.com/help/...

4 months ago | 1

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How to call a function name from function names saved in an array?
prev_output = [1,0,0]; fcs = sprintf('func%s',sprintf('%d', prev_output)); Either use FEVAL: output = feval(fcs,inputs); or ...

4 months ago | 0

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Answered
How to use Unicode numeric values in regexprep?
inp = 'Häagen-Dasz'; baz = @(v)char(v(1)); % only need the first decomposed character. out = arrayfun(@(c)baz(py.unicodedata.n...

4 months ago | 1

Answered
Cutting (dividing) a matrix into a specific number of rows.
A = [11,12,13;21,22,23;31,32,33;41,42,43;51,52,53;61,62,63;71,72,73;81,82,83]; B = reshape(permute(reshape(A,[],2,3),[1,3,2]),[...

4 months ago | 2

Answered
Why does MATLAB not finding a element from my matrix?
Testing for exact equivalence of binary floating point numbers should be avoided. Compare the values, are they actually the sam...

4 months ago | 1

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Answered
Question: Structure Array Generation and Dimensions Manipulation
Simple solution: new = [newpop(:);pop(:)] However if you want to your code to be more robust, then you need to preallocate NEW...

4 months ago | 0

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Answered
Printing all outputs of the function that has been solved via ode45
This questions gets asked regularly on this forum: users often imagine that there must be some easy way to get some values out o...

4 months ago | 1

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Answered
Index exceeds the number of array elements error when using fsolve
Your x0 is a two-element vector, so you told FSOLVE to call the function handle with a two-element vector. But then inside the f...

4 months ago | 0

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Answered
How do I plot a tent-map?
"How do I plot a tent-map?" Following the basic definition of tent map: https://en.wikipedia.org/wiki/Tent_map X = 0:0.01:1; ...

4 months ago | 1

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Answered
Impossible to set VariableTypes as 'double' for complete array and readtable function
Try something simpler and let READTABLE do the work for you: T = readtable('test_log_1.csv', 'CommentStyle','#', 'VariableNamin...

4 months ago | 1

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Answered
Replacing numerical values in table with string
This is MATLAB, so forget about using a loop like that. Either replace the entire column at once or use e.g.: https://www.mathw...

4 months ago | 1

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Sorting files in struct according to time in filename
You could download my FEX submission NATSORTFILES(): https://www.mathworks.com/matlabcentral/fileexchange/47434-natural-order-f...

4 months ago | 0

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How to extract data from a file, and form a column vector?
Note that copy-and-pasting blocks of code like that... is not a generalized approach to writing code. Best avoided. Rather than...

4 months ago | 1

Answered
Generate list of frequencies evenly spaced in logarithmic plot
X = logspace(log10(0.2),log10(628),8) Y = sqrt(X); semilogx(X,Y,'-*')

4 months ago | 1

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Answered
Extracting a double array from within a struct
"So in the end I will have an 18x297 array." Because there are a different number of columns in each matrix you will need to EI...

4 months ago | 0

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Answered
How can I get arguments in my MATLAB batch script to use a series of files with different character strings?
S = dir('/location/*/physio/*_PULS.log'); for k = 1:numel(S) F = fullfile(S(k).folder,S(k).name); T = readtable(F); %...

4 months ago | 0

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Answered
raising an element of a vector to a power gives complex number, but it should be real number
"Oh okay I guess I got it..." No guessing is required, this is explained by the rules of operator precedence: https://www.math...

4 months ago | 2

Answered
How to import text data with different column lengths without having NaN
Keeping the corresponding pairs of columns together: T = readtable('test.txt', 'Delimiter',',') for k = width(T):-2:1 T =...

4 months ago | 0

Answered
Matrixwise subtraction yields vector - how to reshape to original logical matrix?
A = rand(3); B = rand(3); X = A>=0.5; [~,C] = find(X); M = accumarray(C,A(X)-B(X),[],@mean).'

4 months ago | 0

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Answered
Observing Error while reading .csv files
Your code is fragile and complex. You should aim to simplify it and make it more generalised: avoid having lots of hard-coded t...

4 months ago | 1

Answered
Too many input arguments error when cell2mat and mean functions are used
V = [23;27;26;17;7]; N = numel(V); C = nan(N,2); for k = 1:N M = vertcat(iniclu{k,1:V(k)}); % comma-separated list ...

5 months ago | 1

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Answered
Counting First digit of a certain number
t1 = [0, 0; 0, 1; 0, 1; 1, 1; 1, 0; 0, 0; 0, 1]; t2 = [1, 1; 0, 1; 0, 1; 0, 1; 1, 1; 0, 1; 1, 1]; t3 = [0, 1, 1; 1, 0, 0; 1, 1...

5 months ago | 2

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Answered
Loop for Concatenating files *.CSV
V = vertcat(Folder{10:-1:1}); https://www.mathworks.com/matlabcentral/answers/1656435-tutorial-comma-separated-lists-and-how-to...

5 months ago | 0

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Answered
Sequencing data in the loop (*.CSV files)
"How can I keep the data in sequnce." Either use sufficient leading zeros in the filenames OR sort the filenames alphanumerical...

5 months ago | 1

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Answered
How to avoid creating 1x1 struct?
b = linspace(..); e = spline(..); newStruct = struct('b',num2cell(b),'e',num2cell(e)); "I get this which serves no purpose wh...

5 months ago | 0

Answered
How to have a code restart with a different file after finishing with a different file?
"However it combined all of the files into one output file, my new question is how to create a new txt file for each csv file th...

5 months ago | 0

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Answered
Cannot find file that exists for second variable
Your code is looking for a file literally named TIMESERIES: if ~exist('timeseries','file') whereas what you want to do is use ...

5 months ago | 0

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