How can I add a different string to each element in a matrix?

Question

Asher Zaidi 2018-6-7

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/404589-how-can-i-add-a-different-string-to-each-element-in-a-matrix

评论： Ameer Hamza 2018-6-8

采纳的回答： Ameer Hamza

在 MATLAB Online 中打开

I have a (soon to be) large vector and I want to add a string before each element, something like:

"Data Trial 1 - (1st vector element)"

"Data Trial 2 - (2nd vector element)"

... and so on

This is my code:

 files = dir('*.xlsx');
 for i=1:length(files)
    x = importdata(files(i).name); % Creates x.data and x.textdata
    z1 = x.data(:,5); % Grabs column 5 from x.data
    z2 = x.data(:,6); % Grabs column 6 from x.data
 %%Obtains value closest to 0 in column 'z2' (column 6)
    numb=0;
    [~, imin] = min(abs(z2 - numb));
    plot(z1,z2);
    hold on
    plot(z1(imin),z2(imin),'*')
    value(i) = z2(imin);
 end
 %%Displays value closest to 0 in the respective order the data was imported
 disp(value')

After the code is run, the vector looks like this:

How can I add a string before each number in the vector?

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

Paolo 2018-6-7

Please provide an example of desired output. Do you want to concatenate a string with the number?

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Answer 1

Ameer Hamza 2018-6-7

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/404589-how-can-i-add-a-different-string-to-each-element-in-a-matrix#answer_323719

在 MATLAB Online 中打开

One approach is as follow if you want to store all the values in an array,

values = [1,2,3,4,5]; 
charValues = compose('Data Trial %d - %f', (1:length(values))', values')
charValues =
5×1 cell array
  {'Data Trial 1 - 1.000000'}
  {'Data Trial 2 - 2.000000'}
  {'Data Trial 3 - 3.000000'}
  {'Data Trial 4 - 4.000000'}
  {'Data Trial 5 - 5.000000'}