# Stephen Cobeldick

Suspensa Vix Via Fit

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**Content Feed**

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),...

15 hours ago | 0

| accepted

Submitted

Numeric to Ordinal-String

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

1 day ago | 7 downloads |

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...

3 days ago | 0

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 ...

4 days ago | 0

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...

4 days ago | 0

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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...

4 days ago | 0

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...

4 days ago | 0

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...

4 days ago | 0

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)

5 days ago | 1

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) ...

5 days ago | 0

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: ...

11 days ago | 0

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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])

11 days ago | 0

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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...

11 days ago | 0

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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...

11 days ago | 0

| accepted

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'...

12 days ago | 0

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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...

13 days ago | 0

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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...

16 days ago | 1

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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...

16 days ago | 2

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Convert values in the cell to array using cell2mat

The robust approach: out = horzcat(output1{:})

17 days ago | 0

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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...

17 days ago | 0

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Function output produces double array while only a single value is expected

I would avoid all of those superfluous and inefficient type conversions and messing around with indexing into character arrays. ...

17 days ago | 1

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Read set of .dat files in for loop

https://www.mathworks.com/help/matlab/import_export/process-a-sequence-of-files.html P = 'absolute or relative path to where th...

17 days ago | 0

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How to count alternating ones and zeros in a matrix

v =[ 0 0 0 0 0 0; ... 1 1 0 1 1 0; ... 1 0 1 0 1 0; ... ...

18 days ago | 0

Round the elements column of the matrix to the same digit than it is in the other column

S = 2; A = 32*rand(5,7)-13 round(A(:,5),S,'significant') % for comparison P = S-1-floor(log10(abs(A(:,5)))); B = round(A.*10...

18 days ago | 0

how to combine datetime array with cell array for export?

T = table(A,B); writetable(T,...)

18 days ago | 1

| accepted

Submitted

Customizable Natural-Order Sort

Alphanumeric sort of a cell/string/categorical array, with customizable numeric format.

18 days ago | 45 downloads |

Submitted

Natural-Order Filename Sort

Alphanumeric sort of filenames or filepaths, with customizable numeric format.

18 days ago | 350 downloads |

Submitted

Natural-Order Row Sort

Alphanumeric row sort of a cell/string/categorical array, with customizable numeric format.

18 days ago | 19 downloads |

How to use "if statement" for different matrix?

The MATLAB approach is to use arrays and indexing, e.g. using one simple cell array: V = {[1,3,5;2,4,7];[1,2,5;2,4,6];[1,4,5;4,...

18 days ago | 0