Extract Variables from mixed string

Hi all,

In this string

 '# Message: onset_pic1_8.png'

how can I read 'onset', 'pic', '1', '8' in four variables?

[dpb]

Use regexp

Answer 1

[Walter Roberson]

S = '# Message: onset_pic1_8.png';

parts = regexp(S, '(?<name1>[A-Za-z]+)_(?<name2>[A-Za-z]+)(?<num1>\d+)_(?<num2>\d+)', 'names')

parts = 
  struct with fields:

      name1: 'onset'
      name2: 'pic'
       num1: '1'
       num2: '8'

I coded to permit uppercase as well as lowercase, but I did assume that the alphabetic parts remain alphabetic and the numeric parts remain numeric.

[Azar Nejad]

This works great many thanks

Azar

Answer 2

[Paolo]

You can use:

mystring = '# Message: onset_pic1_8.png';
matches = regexp(mystring,'\d|[a-z]+(?=_|\d)','match')

>>matches

{'onset'}    {'pic'}    {'1'}    {'8'}

To obtain the values.

You can't use 1 and 8 as variable names.