MATLAB: How to simplify multi- if statement

if statement

I'm trying to do the following work, given a string of 'ABCDE' etc,
for each letter, it will be assigned with a unique number.
How would I do it without putting 26 if and else if statement in a simple way?
I'm thinking of two matrices. But it may not be on the right track. Can anyone help with this case? Thanx in advance!

Best Answer

STR = char(65:90)
KEY = randi(10000,1,length(STR))
But what are you going to do with these that you would need an IF block for? Are you going to do something like encode a given string?
g_str = upper('Hello')
k_str = KEY(g_str-64)
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