How to find a first letter in a string?

Hello,

I have the following string:

str = '2017-03-28_155051 - JoaquinLR_600fps_ForeheadChestWrist_5minRest';

I would like automatically extract from that string the name, which is JoaquinLR

what would be the best way to do it?

I was thinking maybe I'll find the first letter after space?

[KSSV]

Read about regexp.

Answer 1

[Jan]

str  = '2017-03-28_155051 - JoaquinLR_600fps_ForeheadChestWrist_5minRest';
idx  = find(isletter(str), 1);
name = strtok(str(idx:end), '_');

Answer 2

[Stephen23]

This is easy with regexp or regexpi:

>> str = '2017-03-28_155051 - JoaquinLR_600fps_ForeheadChestWrist_5minRest';
>> regexpi(str,'[a-z]+','match','once')
ans = JoaquinLR