textscan or regex to get numbers from a text message.

Question

Ajpaezm 2019-1-30

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/442155-textscan-or-regex-to-get-numbers-from-a-text-message

编辑： Walter Roberson 2019-1-30

I have an expression that looks like this:

text = '[API.msg2] Order size 400 is smaller than the minimum required size of 500. {916423570, 388}';

This message can change the values of the numbers in the positions where the 400 and 500 are, I'd like to obtain/capture every number that appear in those positions. I tried doing strcmp or textscan using this, but it wasn't successful.

test = textscan(text, 'Order size %s is smaller than the minimum required size of %s.')

Do you know a way to make this work using textscan or regex? Thanks in advance.

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Answer 1

Walter Roberson 2019-1-30

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/442155-textscan-or-regex-to-get-numbers-from-a-text-message#answer_358605

编辑：Walter Roberson 2019-1-30

在 MATLAB Online 中打开

>> text = '[API.msg2] Order size 400 is smaller than the minimum required size of 500. {916423570, 388}';
>> tf = '[API.msg2] Order size %f is smaller than the minimum required size of %f';
>> sscanf(text,tf)
ans =
   400
   500
>> textscan(text, tf)
ans =
  1×2 cell array
    {[400]}    {[500]}
>> str2double(regexp(text, '\d{2,}', 'match'))
ans =
         400         500   916423570         388