Intro to Matlab Questions: Changing numeric values in a vector to string characters

Hi. I'm just starting to learn matlab and I've been stuck on this question.......

Vector R= [0.3902 0.2927 0.2195 0.0732 0.0244]

A=.2927 B=.3902 C=.2195 D=.0244 E=.0732

Now, I'm supposed to create a different vector with the characters, in the same order...but the HINT says "Use a for loop combined with elseif statements."

So the new vector should look like...

R= [B A C E D]

[Walter Roberson]

http://matlab.wikia.com/wiki/FAQ#Why_is_0.3_-_0.2_-_0.1_.28or_similar.29_not_equal_to_zero.3F