Storing concatenated string array problem

Question

Matt Guenther 2018-3-15

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/388598-storing-concatenated-string-array-problem

评论： Guillaume 2018-3-19

I have two 1xn matrices that I want to merge together. If array one held [1 PF Pop, 2 PF Pop, 3 PF Pop...] and the other contained [1 AF Pop, 2 AF Pop, 3 AF Pop], then I would like the result to be the concatenation and array of both elements.

% The desired result is shown below, a single matrix concatenated with both elements
|1 AF Pop 1 PF Pop, 1 AF Pop 2 PF Pop,...|
|2 AF Pop 1 PF Pop, 2 AF Pop 2 PF Pop,...|
|3 AF Pop 1 PF Pop, 3 AF Pop 2 PF Pop,...|
% my code so far is below
for P=1:3
    F=P*3;
    for G = 1:4
        G=(G+1)*F;
        divbytwo=G/2;
        bact8(P,G)=divbytwo; %array of P+1 elements
    end
end
bacttry=bact8;
bacttry(1,:)=[];
no_of_rows=size(bacttry);
no_of_columns=no_of_rows;
no_of_columns(:,1)=[];
no_of_rows(:,2)=[];
array_columns=strcat(strtrim(cellstr(num2str((1:no_of_columns)'))'),' PF Pop');
array_rows=strcat(strtrim(cellstr(num2str((1:no_of_rows)'))'),' AF Pop');

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Guillaume 2018-3-19

在 MATLAB Online 中打开

I have no idea which arrays you want to concatenate and into what. However you can create your two array_* much more simply with:

array_columns = compose('%d PF Pop', 1:no_of_columns);
array_rows = compose('%d AF Pop', 1:no_of_rows);

And your way of getting the number of rows and columns is extremely convoluted.

[no_of_rows, no_of_columns] = size(bacttry); %assuming that bacttry is 2D

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Answer 1

Venkata Siva Krishna Madala 2018-3-19

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Hello Matt,

You should consider using cell arrays for this purpose. To concatenate 2 1xn arrays to a single nxn matrix the code will be :-

x1= {'1 PF Pop', '2 PF Pop', '3 PF Pop'}
x2= {'1 AF Pop', '2 AF Pop', '3 AF Pop'}
x={}
for i=1:numel(x1)
    for j=1:numel(x2)
        x{i,j}=strcat(x1{i},x2{j});
    end
end