MATLAB: How to find a first letter in a string

Question

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?

Answer 1

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