help with matlab char arrays

[SnkMajin]

Hi

I'm new to matlab, and i'm having some trouble and hope that you can help.

I need to create a 100 row * 500 col array in which each element holds one of 4 letters (a,t,g,c - dna). I'n not sure how to do this, yet.

Will i need to create a for loop? and how can i fill an array in matlab with letters?

I'd really apprciate any help

Thanks for your time

SnkMajin

 

[JockeK]

You don't need to but you can create a for loop. It won't affect your execution time.

Here is one solution to your problem

dna = ['a' 't' 'g' 'c'];
r = ceil(4*rand(100,500));  % generates random numbers 1-4 in a 100x500 matrix
m = dna(r);                 % matrix of random dna.

 

[SnkMajin]

Hi JockeK,

Wow thanks, that works a treat!
I've been wracking my brain and had no joy! Had a different approach but your is way better.
I'm gonna have to manipulate this array now and think i have an idea.

Hope you dont mind me pestering you if icant get it to work.

Thanks again!
SnkMajin