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# Stephen23

Active since 2014

Suspensa Vix Via Fit

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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...

ongeveer 16 uur ago | 0

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(...

ongeveer 18 uur ago | 0

Str2double gives NaN

ongeveer 20 uur ago | 1

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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 ...

ongeveer 22 uur ago | 0

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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)

1 dag ago | 1

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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...

3 dagen ago | 0

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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...

4 dagen ago | 0

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...

4 dagen ago | 0

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...

5 dagen ago | 1

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 =...

5 dagen ago | 1

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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...

5 dagen ago | 0

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

5 dagen ago | 3

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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(...

5 dagen ago | 0

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....

6 dagen ago | 0

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,{':...

6 dagen ago | 0

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Creating a row vector of combinations?

6 dagen ago | 3

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...

7 dagen ago | 0

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

7 dagen ago | 1

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

7 dagen ago | 1

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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...

7 dagen ago | 0

Not enough input arguments (line 2)

7 dagen ago | 1

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

8 dagen ago | 0

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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...

10 dagen ago | 0

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...

10 dagen ago | 0

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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...

10 dagen ago | 1

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

10 dagen ago | 0

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....

10 dagen ago | 1

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How do I print a legend using a character array and integer array?
COMPOSE() is perfect for this, but was first introduced in R2016b. You could use ARRAYFUN() or CELLFUN(): C = {'Current','Curre...

12 dagen ago | 0

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