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Stephen Cobeldick


Last seen: Today Active since 2014

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Answered
Convert Time Given in Seconds to Minute, Seconds, Milliseconds
If you really need minutes (i.e. and not roll-over to hours for >59 minutes) then you can calculate this yourself, e.g.: inp = ...

alrededor de 1 hora ago | 0

Answered
replace specific commas using strrep
"I converted my data... using str2num." Although your descriptiion is unclear, I guess that your goal to convert text data into...

alrededor de 2 horas ago | 0

Answered
How can I create this matrix?
n = 5; r = 2:5; F = @(k)any(permute(nchoosek(1:n,k),[3,1,2])==(1:n).',3); M = cell2mat(arrayfun(F,r,'uni',0))

1 día ago | 0

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Answered
Effective matrix defining (diagonals)
N = 7; M = toeplitz([-2,1,zeros(1,N-2)])

1 día ago | 1

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Answered
Remove String and extract numbers to move to new column
S = [... "[0, 0]" "[0, 5]" "[5, 115]" "[115, 219]" "[219, 262]" "[262, 328]" "[328, 408]" "[408, 424]" "[424, 531]" "[...

1 día ago | 0

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Answered
Help with regexp to extract data
tdata = {'W1W','W1W 7','W1W 8','AZ_85262','CA_90032','CA_90045'}; tkn = regexp(tdata,'^(.*?)_?([^_]*)$','tokens','once'); tkn ...

2 días ago | 0

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Answered
complicated formatted text with textscan
I removed the extra line of numbers from block 3, the modified data file is attached. This code imports the modified data file:...

2 días ago | 0

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Answered
How to cut multiple file ans past it to folder?
mkdir 4ASK movefile frame4ASK*.m 4ASK

2 días ago | 0

Answered
Using cell array for indexing
No need for a loop, here is the simple and efficient MATLAB approach: IndArray = {i1,..,im}; IndArray(1+end:ndims(A)) = {':'};...

3 días ago | 1

Answered
How to organize an array (x_i,y_j,z) such that (x_i,y_i)=z?
The trick is to use https://www.mathworks.com/help/matlab/ref/sub2ind.html A = [1,1,2;1,2,0.5;2,1,0.5;2,2,1] S = max(A(:,1:2),...

5 días ago | 0

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Submitted


Numeric to Ordinal-String
Convert numeric values to a string array of integers with ordinal suffixes. Fully vectorized!

6 días ago | 10 downloads |

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Answered
why "writetable" replaces points with commas ???
"why "writetable" replaces points with commas ???" It doesn't. The Open Office XML format (e.g. XLSX) uses only the decimal po...

7 días ago | 0

Answered
'123' to 123
A = '123' A = str2double(A)

7 días ago | 0

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Answered
Indexing a variable in a cell array?
strcmpi(txt2,date) But... you should be using READTABLE to import that file data, and handle those dates as DATETIME, not as ...

8 días ago | 0

Answered
Add variables calculated in a for loop into an array
I suspect that you need something like this: nml = numel(numbers); out = nan(nml,1); for k = 1:nml out(k) = calculate(nu...

8 días ago | 0

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Answered
How can I change the line color in a graph using plot
You are using MATLAB R2014a, which uses the old graphics system. That YouTube tutorial uses R2015b, which includes a totally ne...

8 días ago | 0

Answered
Why is x(:) so much slower than reshape(x,N,1) with complex arrays?
I hypothesize (without much proof) that colon (aka indexing) simply does a lot more under the hood. We can assume that it calls...

8 días ago | 0

Answered
Get number of fields? the result should be 14! I tried with size but it did not work!
"I tried with size but it did not work!" The size of a structure is completely independent of how many fields it has. To count...

8 días ago | 0

Answered
Select particular elements from a cell array to form a matrix (double type)
Simply: fun = @(x) x.endo_simul(17,1); out = cellfun(fun,results)

9 días ago | 1

Answered
What is the most correct way of determining whether variable contains a number
Let MATLAB do the heavy lifting for you: fun = @(x) isnumeric(x)&&isfinite(x) || isfinite(str2double(x)); fun(2.3) fun(NaN) ...

9 días ago | 0

Answered
How to create exportable table from outputs of function iterated using for loop?
If your function has four outputs then you need to call it with four outputs. This is explained in the introductory tutorials: ...

15 días ago | 0

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Answered
How to reshape 3D matrix ?
A = randi(9,4,4,3) B = permute(reshape(permute(A,[2,1,3]),[2,8,3]),[3,1,2])

15 días ago | 0

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Answered
Where can I download apiref.pdf
This PDF file: https://www.mathworks.com/help/pdf_doc/matlab/matlab_apiref.pdf is listed here: https://www.mathworks.com/help...

15 días ago | 0

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Answered
Why is my loop not working?
Look closely at the variable a: a=0; for .. a=a+50; [b,a]=ellip(..[a 5000]..); .. end At the start of the fir...

15 días ago | 0

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Answered
Merge a row to a single cell
C = {... '1' '2' ':' '5' '7' ':' '0' '0' '1' '2' ':' '5' '7' ':' '0' '0' '1' '2' ':' '5' '7' ':' '0' '0' '1'...

16 días ago | 0

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Answered
The size of the indicated variable or array appears to be changing with each loop iteration. Commonly, this message appears because an array is growing by assignment or concat
h = 1; r = 0:h:20; z = 0:h:20; [rgrid,zgrid] = meshgrid(r,z); zgrid = flip(zgrid) Simpler, faster code: b2 = find(zgri...

17 días ago | 0

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Answered
What does this mean "No differences to display. The files are not identical, but the only differences are in end-of-line characters."
"Can anyone help me to understand the meaning? " When you look at those files then they are shown with lots of lines. You might...

20 días ago | 1

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Answered
How to include 'end' in a varibable to extract a subset of the original vector ?
"... if i want to define range before the definictiion of the vector..." You could use an anonymous function: rng = @(v)v(1:en...

20 días ago | 2

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Answered
Convert values in the cell to array using cell2mat
The robust approach: out = horzcat(output1{:})

20 días ago | 0

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Answered
How to store matrices in a cell from a loop?
Rather than lots of separate variables, use a comma-separated list to store the function outputs: https://www.mathworks.com/hel...

21 días ago | 0

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