how to change size of a string?

I use regexp(struct(jjj).name,'\_','split'); command to split this structure: K10_5. After being split: {'K10'} I convert it to ordinary array using cell2mat: 'K10'

I realized that 'K10' size is 1*3. How can I make it to be 1*1 not 1*3?

Answer 1

[Stephan]

a = 'K10'
b = string(a)
whos