MATLAB: How to extract n characters from a string ??

Question

I have a dataset including a variable named "code". I format it as type "character".

This variable contains such observations like G4411, H5551, K9878..

Now I want to extract the first character out of every observation.

This means G4411 –> G, H5551 –> H, K9878 –> K

I have also attached the data file at the end of the post!

Could somebody help me with this problem?

Many Thank and best regard!

Answer 1

I can get it to work with your example but not your data:

C = {'G4411'; 'H5551'; 'K9878'};
res = regexp(C, '\w','match','once')
res = 
      'G'
      'H'
      'K'

When I try to load your data, it crashes my computer.