How to replace numbers in one vector according to two 'translation vectors'

Hi,

I probably just googled for the wrong terms as this seems to be a very common problem.

I have a vector A that needs to be translated into the vector D according to the rules set in vectors B and C.

A = [3; 5; 8];
B = [3; 4; 5; 7; 8];
C = [1; 2; 3; 4; 5];
D = ?

B and C say, how the translation works. Example 1: a 3 in A must become a 1 in D. Example 2: a 7 in A (although there isn't any, but if there were) must become a 4 in D.

So the solution for D must be [1; 3; 5]. How can I get there?

Answer 1

[jonas]

D = interp1(B,C,A)

[Clemens Gersch]

Quite a "think outside of the box" idea. I know interp1, but would have never got to the point of using it in this constellation.

Works fine, thanks.

[jonas]

My pleasure!

It makes sense if you think of your translation vectors as a function.