split a string by a set of pre-defined number of characters rather than any delimiter

How to

1) First split a string by the number of chacters to five substrings, where sub string 1 has 19 characters and the rest of 4 substrings have only 13 chacaters?

Please note that I do not want to split using the tab or whitespace.

2) Remove any non dnumeric values (e.g. "- Psat" in the following example) and any white spaces from the resulting substrings?

Example: if S1 is my original string

S1= '    961.666 - Psat        1.0000                   45.0971       3.6734'

I want to have the final substrings as

'961.666', '1.0000', '45.0971' and '3.6734'

[Rik]

You can use a regular expression. I'm on mobile, so writing the regex myself is a bit challenging.

Answer 1

[Stephen23]

You could do that using regular expressions:

>> S1 = '    961.666 - Psat        1.0000                   45.0971       3.6734';
>> C = regexp(S1,'(.{19})(.{13})(.{13})(.{13})(.{13})','tokens','once');
>> C = regexprep(C,'[^\d\.]+','')
C = 
    '961.666'    '1.0000'    ''    '45.0971'    '3.6734'

Although I suspect that you probably want something more like this:

>> C = regexp(S1,'\d+\.\d*','match')
C = 
    '961.666'    '1.0000'    '45.0971'    '3.6734'

Answer 2

[Walter Roberson]

Just index, and strtrim()