reading some part of string from cell array in MATLAB

Question

I want to copy some part of a string from a cell array and put it into another cell array in MATLAB.

For example, one struct is like this

{>eco:b0002 thrA; Bifunctional aspartokinase/homoserine dehydrogenase 1 (EC:1.1.1.3 2.7.2.4); K12524 bifunctional aspartokinase / homoserine dehydrogenase 1 [EC:2.7.2.4 1.1.1.3] (N) atgcgagtgttgaa...},

I want to paste the

'>eco:b0002 thrA; Bifunctional aspartokinase/homoserine dehydrogenase 1 (EC:1.1.1.3 2.7.2.4); K12524 bifunctional aspartokinase / homoserine dehydrogenase 1 [EC:2.7.2.4 1.1.1.3] (N)'

part of referring string into another cell array.

In each cell it begins with '>' and ends up with '(N)', as you see one of them in the example.

I can't find any helpful function to start with.

Luis Mendo · Accepted Answer · 2015-04-25 14:55:07Z

1

>> str = '>eco:b0002 thrA; (N) atgcgagtgttgaa...';
>> result = regexp(str, '\>.+\(N\)', 'match');
>> result = result{1}
result =
>eco:b0002 thrA; (N)

answered Apr 25, 2015 at 14:55

Luis Mendo

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Tobia Tesan · Accepted Answer · 2015-04-25 13:25:37Z

0

You want to use a regular expression.

Try for example:

> str = "> fooooo (N) bar baz"
> exp = "^>(.*)\\(N\\).*$"
> [tokens, matches] = regexp(str, exp, 'tokens', 'match')
> tokens{1}{1}
ans => foooooo

(Disclaimer: I tried the above in Octave, which should behave exactly the same).

answered Apr 25, 2015 at 13:25

Tobia Tesan

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3 Comments

Luis Mendo Over a year ago

I got an error in Matlab (even with single quotes instead of double qoutes). tokens is returned as empty

Tobia Tesan Over a year ago

Unfortunately I do not have a MATLAB installation at hand to experiment with the finer details of MATLAB's regexp dialect, but I see it's no longer necessary :)

Luis Mendo Over a year ago

I didn't see anything obvious to correct/suggest in your answer, so I wrote mine :-)

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