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Stephen23


Active since 2014

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Answered
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...

12 hours ago | 0

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

15 hours 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...

19 hours 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); %...

1 day ago | 0

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...

3 days 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 =...

3 days 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).'

3 days 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...

3 days 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 ...

6 days 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...

7 days 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...

7 days 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...

7 days 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...

9 days 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...

9 days 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 ...

9 days ago | 0

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Answered
How to solve incosistent scientific format ?
Do not convert to text and compare text. Compare the numeric values. Best of all by comparing the absolute difference against a...

11 days ago | 1

Answered
Function with 3 input arguments
"I just know I am missing something fundamental here..." Exactly the same fundamental concept as your previous questions: defi...

13 days ago | 1

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Answered
How do I insert a substructure within an existing structure at a specific index
"What is the simplest way to do this?" With a structure array this would be easy with some indexing. It would also make accessi...

15 days ago | 0

Answered
Confusing sprintf() behavior
"Is this a bug?" No. SPRINTF and FPRINTF apply the entire format string to the data values, repeating the entire format string...

15 days ago | 1

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Answered
concatenate multiple 'OutputFcn' options in odeset?
Define a wrapper function to call whatever functions you want. Note that the wrapper function itself will need to fulfill the r...

19 days ago | 1

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Answered
Plotting matrix data without existing x-values.
S = load('befolkning2019.mat'); M = S.befolkning2019 X = 0:size(M,1)-1; plot(X,M) legend('male','female')

20 days ago | 0

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Answered
Creating 25 x 2 matrix with each row range is 20
m = (0:20:499).' + [1,20]

20 days ago | 1

Answered
Deleting specific repeating sequence from a column vector
"Might there be a more elegant solution?" You don't need a loop, just remove them all at once e.g.: Data = [ 0 %Pac...

21 days ago | 0

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Answered
Writing code to call functions
"I don't think I've learned how to properly call functions because I keep getting errors when trying to run function." The prob...

22 days ago | 1

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Answered
How to calculate and display electricity used in a month using fprintf?
Note that the assignment does not require that you also print the number of kWH, only the charge is required: n = input('How ma...

25 days ago | 0

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Answered
I just want to run my script within a certain time periodically. That's it all ....
Use https://www.mathworks.com/help/matlab/ref/timer.startat.html This is the function that lets you specify an absolute time ...

25 days ago | 1

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Answered
Why is my table being saved in a wrong way in a CSV file?
"Why is my table being saved in a wrong way in a CSV file?" Why do you think that MATLAB is doing something wrong? "but when I...

25 days ago | 0

Answered
Split File paths by '\' but file paths have varying subfolders and thus lengths
Your code is very complex. You can simplify it by letting DIR recursively parse the folder structure. Lets try it here: mkdir ...

26 days ago | 0

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Answered
How to create struct of cell arrays
"I was wondering if this is the most "MATLABic" way of doing that" Yes. "...and why the following does not work" Because by d...

26 days ago | 0

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Answered
cheatsheet for dealing with structures?
"im trying to get all timestamps "timestamp" (for finding duplicate fields) of sub stucture "trainLocations" from every first ce...

27 days ago | 0

| accepted

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