how to concatenate in matlab?

A=power; load ;density;
b=_mean;_std;_max;_min;

A is a set of string in .txt file 1 and B is a set of string in .txt file 2. I need to concatenate the corresponding strings in both text files and put it in the excel sheet, such that ,i need output as,

 power_mean power_std power_max power_min load_mean and so on.

 It should be stored in excel in a row(1*12). its nothing like creating header or label to my  values. im stuck here... help me

[Walter Roberson]

How do strings "correspond" ? The 5th A corresponds to the 5th B? Or the content of one needs to be searched in the content of the other?

How are you representing the strings? As cell arrays or as arrays of characters?

Please give an example of a line from each of the files.

[sandy]

strings in A is present in file header_01.txt in (3*1),also strings in b in header_02.txt in(4*1).i am loading both files to A and b in cell arrays only.

Inside A, power load density ; Inside b, mean std max min

my output should be in excel file and output come like, power_mean in 1*1,power_std in 1*2 and so on.below in each cells(1*12) in excel file

 power_mean power_std power_max power_min load_mean and so on.

[Andrei Bobrov]

see my answer

Answer 1

[Andrei Bobrov]

A={'power'; 'load' ;'density'};
b={'mean';'std';'max';'min'};

[ii,jj] = ndgrid(1:numel(b),1:numel(A));
out = reshape(strcat(A(jj),{'_'},b(ii)),1,[]);

ADD

nm = {'E:\header_01.txt','E:\header_02.txt'};
c1 = cell(1,2);
for jj = 1:2
    f = fopen(nm{jj});
    c = textscan(f,'%s');
    fclose(f);
    a1 = regexp(c{:},'\w*','match');
    c1{jj} = cat(1,a1{:});
end
n = cellfun('length',c1);
[ii,jj] = ndgrid(1:n(2),1:n(1));
out = reshape(strcat(c1{1}(jj),{'_'},c1{2}(ii)),1,[]);

[Walter Roberson]

You can ndgrid cell arrays of strings? I never knew that!

[Andrei Bobrov]

Oh! I used Octave! Corrected. Thank you Walter!

[sandy]

hi Andrei,...thanks for ur reply... but it showing error if i run this code as, ??? Undefined function or method 'full' for input arguments of type 'cell'.

Error in ==> ndgrid at 38 varargin{i} = full(varargin{i}); % Make sure everything is full

Error in ==> append at 3 [ii,jj] = ndgrid(b,A);

[Andrei Bobrov]

I did all the corrections.