MATLAB: Creating logical arrays based on condition

arraylogical-arrays

I have an output array a[0.5,0.7,0.9], a threshold array b[0.3, 0.8, 0.7], and a lookup values array c[0,1,2]
I want a finalOutput array, f, which contains the corresponding values c if a>b else -1.
I decided to use a logical indexing array using the following code for this:
a(a>b)=1;
a(a<=b)=0;
a=logical(a);
f=c(a);
But f only contains the values of c where a=1. How can I write conditional statements to get f=[0,-1,2] ?
I also want to get the logical a in one line, because the second line of code gives incorrect outputs if I change a to [1.5, 0.7, 0.9] and b to [1.3, 0.8, 0.7].
Appreciate all suggestions.

Best Answer

c(a<b)=-1
f=c
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