Stephen23

Active since 2014

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I want to export data to txt file in Loop
P = 'absolute or relative path to where the files are saved'; S = dir(fullfile(P,'*.txt')); for k = 1:numel(S) F = fullfi...

7 hours ago | 0

Answered
i am tring to input different z values to get different B using matrix manipulation. just having trouble using for loop
Note that I replaced the INV()* with the recommended MLDIVIDE: https://www.mathworks.com/help/matlab/ref/inv.html#bu8tv8c-6 An...

7 hours ago | 0

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Answered
How to break data in to groups using while loop?
M = [1 50 60 70 50 40 2 NaN 10 20 10 10 3 NaN 20 NaN NaN NaN 1 NaN 60 30 40 50 2 10 20 10 20 NaN 1 30 2...

20 hours ago | 0

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How can i calculate the length of curve?
A very simple approach is to download John D'Errico's excellent ARCLENGTH function: https://www.mathworks.com/matlabcentral/fil...

2 days ago | 0

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How to measure elapsed time in hh:mm:ss?
You can do this with SECONDS(), but then it requires two lines. Here is a simple solution on one line: tic .. dur = duration(...

2 days ago | 0

Answered
Str2double gives NaN
https://www.mathworks.com/matlabcentral/answers/437449-matlab-coder-giving-issue-with-textscan#answer_354189 X = "3.716,3.711,3...

2 days ago | 1

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Answered
Why do I receive the error "Undefined function 'times' for input arguments of type 'matlab.graphics.chart.primitive.Line'"?
The basic problem is that you have re-used the variable name p. You think that p is some value from the start of your code, but ...

2 days ago | 0

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Answered
How to find number of bit change between binary numbers?
A = ['110'; '101'; '011'; '111'; '100'; '001'; '010'] B = sum(diff(A,1,1)~=0,2)

3 days ago | 1

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Answered
How to loop function for all timesteps in one text file
T = fileread('atomlocation.txt'); C = regexp(T,'(^\S+\s+\S+\s+\S+\s*\n)+','lineanchors','match') N = numel(C); fprintf('%d bl...

4 days ago | 0

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Answered
How to create a 3D Matrix?
"While in python this matrix is of 3*2*5," Not really, it is actually just a whole lot of nested 1D lists. In some languages th...

5 days ago | 0

Answered
This statement is not inside any function. (It follows the END that terminates the definition of the function "mixing_tank".)
The function definition needs to come after all of the other code. See: https://www.mathworks.com/help/matlab/matlab_prog/local...

6 days ago | 0

Answered
Get special variable out of every struct in workspace
"Is there any way to extract the "values" out of these 2 structs for each variable which is loaded into the workspace?" Yes, bu...

6 days ago | 1

Answered
How to load all .mat file in the current directory and save them as .wav file?
P = 'C:\Users\Desktop\BE'; S = dir(fullfile(P,'*.mat')); for k = 1:numel(S) F = fullfile(S(k).folder,S(k).name); D =...

6 days ago | 1

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Answered
How do I add rows to a table in a for loop?
"... it keeps producing the tables I want, but not in the order I want, and I don't know how to fix this." My guess (in lieu of...

7 days ago | 0

Answered
identifying entry elements in rows of logical matrix
A = [1,1,1;0,1,1;0,0,0;0,1,0] B = A .* (cumsum(A,2)==1) % replace .* with & to get a logical output

7 days ago | 3

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Answered
How to perform function whos output is a struct in a loop?
Assuming identical fieldnames, the simplest and most robust solution is to concatenate the structure after the loop: N = numel(...

7 days ago | 0

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Deleting fields of a particular dimension in a structure
As I wrote in several of your earlier questions, this task would be much easier if your data were better designed: https://www....

7 days ago | 0

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How can I change timestamp format?
The best solution is to fix the source. Otherwise: C = {'09.02.2022 14:41:56:999';'09.02.2022 14:41:57:1'} D = regexprep(C,{':...

7 days ago | 0

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Answered
Creating a row vector of combinations?
One simple aprpoach is to download this FEX submission: https://www.mathworks.com/matlabcentral/fileexchange/24325-combinator-c...

7 days ago | 3

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Extracting names from first row of index and seeing if they are equal to indexed variable?
You can simplify this by using one loop. Lets first create some fake data: mkdir ./scan1 mkdir ./scan2 mkdir ./scan3 writema...

8 days ago | 0

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Answered
How to eliminate values after comma, in double value?
A wild guess: V = [0.2,0.2862] W = fix(V*10)/10

8 days ago | 1

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Answered
How i creat Costomer fscanf?
format long M = readmatrix('sol2.txt', 'Delimiter',{' ','∠'}, 'MultipleDelimsAsOne',true, 'TrimNonNumeric',true)

8 days ago | 1

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Answered
How to save the Data in different array using Value in 2nd column
Clearly creating lots of separate variables in the workspace would be a very bad approach: https://www.mathworks.com/matlabcent...

8 days ago | 0

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Not enough input arguments (line 2)
You need to learn about function handles: https://www.mathworks.com/help/matlab/function-handles.html I also had to fix your c...

8 days ago | 1

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Answered
Return variable from nested function
Callback functions do not return output arguments**, so your approach will not work. The MATLAB documentation explains approache...

10 days ago | 0

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Answered
How to convert fields in a struct into an int?
This would be much easier if your data were better designed, exactly as I recommended in your last question (which you have so f...

11 days ago | 0

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How do you iterate over multiple fields in a structure?
One approach is to use FIELDNAMES() and dynamic fieldnames: https://www.mathworks.com/help/matlab/matlab_prog/generate-field-na...

11 days ago | 0

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Answered
Plotting data from struct array
"I am really not sure how to call plot with the plot vectors being contained in fields/subfields of a struct array." The answer...

12 days ago | 1

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Answered
Create folders and organize data based on file name.
movefile('*CP-A-01*.*', 'newdir01') movefile('*CP-B-01*.*', 'newdir02')

12 days ago | 0

Answered
Is it possible to create a nested structure with dynamic field names?
"However, this version of dot indexing (right side dynamic naming) is not supported." Lets try it right now: S.A.B.C = pi; S....

12 days ago | 1

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