How can I get a non-determined specific part of a string?

Dear all,

I have a big string containing a lot of different phrases. I need to get some phrases that I know how they begin and how they end.

e.g:

text='Hello. I'm a really big cat. { Attention: this string is a example.} Thats all';

How can I get the part between '{ Attention:' and '. }' ?

Like this:

Result='{ Attention: this string is a example.}';

I know how can I do it in a non-simple way, with loops and so, but I think that there is something with regexp that I don't know.

Thank you all

Answer 1

[Image Analyst]

Maybe this?:

textString = 'Hello. I am a really big cat. { Attention: this string is a example.} Thats all';
leftBraceLocation = strfind(textString, '{')
rightBraceLocation = strfind(textString, '}')
textInBetween = textString(leftBraceLocation + 1: rightBraceLocation - 1)

Answer 2

[Jan]

It depends. What do you want as result of:

'Hello. } { Attention: { Attention: example.{} { Attention: ';

If nested key as curly braces outside the wanted pattern are impossible, you could use:

ini = strfind(textString, '{ Attention:');
fin = strfind(textString, '}');
index = zeros(1, length(textString));
index(ini + 12) = 1;
index(fin)      = -1;
result          = textString(cumsum(index) ~= 0);

Answer 3

[ab]

I need to take all the parts that have that concrete words.

e.g:

text='Hello. Attention: there is a problem: xxxx . More things. Attention: there is another problem: xxxx . For example';

result(1)='Attention: there is a problem: xxxx '; result(2)='Attention: there is another problem: xxxx ';

Thank you all again

Edit: Sorry. It was easy.

leftBraceLocation = strfind(text, 'Attention'); rightBraceLocation = strfind(text, 'xxx');

for index = 1:length(leftBraceLocation) textInBetween{index} = text(leftBraceLocation(index) + 1: rightBraceLocation(index) - 1) end