Extract single-digit and double-digit numbers at the same time from a cell array with "regexp"

Question

Sim 2024-2-12

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2081171-extract-single-digit-and-double-digit-numbers-at-the-same-time-from-a-cell-array-with-regexp

编辑： Les Beckham 2024-2-12

采纳的回答： Les Beckham

在 MATLAB Online 中打开

Hi, I am trying to extract the numbers from the following cell array:

a={'1','3','6-10','11-20'};

If I use regexp, the number 10, 11 and 20 are also split:

b=regexp(a,'[0-9]','match');
b{:}
ans = 1×1 cell array
    {'1'}
ans = 1×1 cell array
    {'3'}
ans = 1×3 cell array
    {'6'}    {'1'}    {'0'}
ans = 1×4 cell array
    {'1'}    {'1'}    {'2'}    {'0'}

I would like to have the number 10, 11 and 20 unsplitted. How to do it, maybe still with regexp?

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Sim 2024-2-12

在 MATLAB Online 中打开

I found the solution of @Walter Roberson, that I slightly modified (I just removed the option "once" after "match"), but it still holds the minus sign attached to the numbers:

a={'1','3','6-10','11-20'};
b = regexp(a, '(-?\d+(\.\d*)?)|(-?\.\d+)', 'match');
b{:}
ans = 1×1 cell array
    {'1'}
ans = 1×1 cell array
    {'3'}
ans = 1×2 cell array
    {'6'}    {'-10'}
ans = 1×2 cell array
    {'11'}    {'-20'}

Sim 2024-2-12

移动：Stephen23 2024-2-12

Great answers both @Stephen23 and @Les Beckham!! I would accept both obviously!

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Answer 1

Les Beckham 2024-2-12

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2081171-extract-single-digit-and-double-digit-numbers-at-the-same-time-from-a-cell-array-with-regexp#answer_1407101

编辑：Les Beckham 2024-2-12

在 MATLAB Online 中打开

a={'1','3','6-10','11-20'};
b=regexp(a,'[0-9]+','match'); %<<< add the + to match multiple numeric characters
b{:}
ans = 1×1 cell array
    {'1'}
ans = 1×1 cell array
    {'3'}
ans = 1×2 cell array
    {'6'}    {'10'}
ans = 1×2 cell array
    {'11'}    {'20'}