how to extract n characters from a string ???

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

[Star Strider]

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.

[Weird Rando]

additional code:

load matlab.mat
C = dataset2cell(data(:,4));

Then Star's code with out the first line of code.

[Star Strider]

Thank you, Scott. Tired tonight.

C = dataset2cell(data(2:end,4));

would definitely work. Thanks for reminding me about dataset2cell.

[Dung Le]

Thanks :) It works very well !

[Star Strider]

My (our) pleasure!

[Weird Rando]

:)