Telling numbers and letters apart

Hi!

I have to run a script to check a character in a string is a letter or a number, but i dont know how. Can someone help me?

Basically I get lines of raw data that look like this, a letter followed by 4 numbers:

A3324B4543

C3435F3455

Z2334G3455

Sometimes (about ~1/200 elements) i get a wrong one, that is either too long, too short, or has letter and numbers in the wrong order, like:

D56788T5434

E44G5555

1D345G5679

I can easily filter out the first two by checking the lenght of the string, but i am unable to filter out the third kind of error.

I'm grateful for all of the help you can give me

Answer 1

[Steven Lord]

You can use the isstrprop function to determine which characters inside a string are letters.

S = ["D56788T5434"
"E44G5555"
"1D345G5679"]
L = isstrprop(S, 'alpha')

I assume the reason you object to the third string is that it doesn't start with a letter?

startsWithLetter = L{3}(1) % false

[GIOELE BORDIN]

Thank you very much! the isstrprop function is exactly what i need