CODEWITHSUNDEEP
matlab
Saba
Saba

Reputation: 61

How to insert comma after each element in matlab?

I have a vector with 4225 elements that its elements are separated by spaces and I have to use this vector in MuPAD as edge weight matrix of a directed graph. In order to make this vector accessible in MuPAD as a graph edge weight matrix, its elements should be separated by commas. Since the number of elements is huge, it's a waste of time to write commas between them one by one. So is there any simple way to do this in matlab?

Big thanks in advance

Upvotes: 1

Views: 5199

Answers (2)

Rody Oldenhuis
Rody Oldenhuis

Reputation: 38032

This ought to do the trick: 

%// example vector
a = [4 5 6 7 8 9 10 11 12 13];

%// replace all consecutive spaces with a comma
aCSV = regexprep(num2str(a,17), '\s*', ',')

Output: 

aCSV = 
    4,5,6,7,8,9,10,11,12,13

Upvotes: 3

horchler
horchler

Reputation: 18484

Here's a version using only sprintf:

v = [1 2 exp(1) 3 pi 4 5 realmax];
s = sprintf('%.17g,',v); % Up to 17 decimal places (double precision has about 16) 
s = s(1:end-1);          % Remove trailing comma

This returns

s =

1,2,2.7182818284590455,3,3.1415926535897931,4,5,1.7976931348623157e+308

See this article for details on using format strings with sprintf if you wish to further customize this.

Upvotes: 3

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