CODEWITHSUNDEEP
stringmatlabcell-array
Nick
Nick

Reputation: 55

How to combine a different strings under one single cell array in matlab?

I have data in different cells (mostly strings) and I would like to bring some of the data in one cell and keep the rest of the data as it is.

For instance:

A = {'1' '2' '3' '4' '5'; '6' '7' '8' '9' '10'; '11' '12' '13' '14' '15'};

The desired output should be:

B = {'1' '2' '3 4 5'; '6' '7' '8 9 10'; '11' '12' '13 14 15'};

The numbers must be separated by a space.

Upvotes: 0

Views: 94

Answers (4)

Rody Oldenhuis
Rody Oldenhuis

Reputation: 38032

Just in case anyone here has MATLAB prior to R2013a (which does not have strjoin()) or R2013b (which does not have join()):

% The original
A = { '1'  '2'  '3'  '4'  '5'
      '6'  '7'  '8'  '9' '10'
     '11' '12' '13' '14' '15'};

% The new
B = A;
B(:,3) = strcat(arrayfun(@(ii) sprintf('%s ', B{ii,3:end-1}), 1:size(B,1), 'UniformOutput', false)', ...
                B(:,end));
B(:,4:end) = []

which is so fugly that it only serves as a vindication for strjoin() :)

Upvotes: 0

matlabbit
matlabbit

Reputation: 706

Using string and join in 16b makes this a bit easier than using strjoin since join works with the dimensionality of matrices.

>> A = string({'1' '2' '3' '4' '5'; '6' '7' '8' '9' '10'; '11' '12' '13' '14' '15'});
>> [A(:,1:2) join(A(:,3:end),2)]

ans = 

  3×3 string array

    "1"     "2"     "3 4 5"   
    "6"     "7"     "8 9 10"  
    "11"    "12"    "13 14 15"

Upvotes: 1

Theodore Dale
Theodore Dale

Reputation: 1

Use the strjoin method.

strjoin(A(1,1:3))
returns '1 2 3'

// Automatically has spaces.

This MATLAB method defaults to a space delimeter. However.... If you should need an additional delimeter use this

strjoin(A(1,1:3),'*')
returns '1*2*3'


B = A(:,1:2);
  for count = 1:size(A)
     B(count,3)=cellstr(strjoin(A(count,3:5)));
  end

This is how I would do what you wanted above.

Upvotes: 0

User1551892
User1551892

Reputation: 3364

c{1} = 'a'
c{2} = 'b'
c{3} = 'c'
>> c{2} = 'b'
c = 
  'a'    'b'    'c'
>> {char(c)'}
ans = 
    'abc'
>> {strjoin(c, ' ')}
ans = 
    'a b c'

Upvotes: 0

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