trouble with loops need help

hi if i have an array with [1 2 3 4] and i wanted to associate 1 with 20, 2 with 30, 3 with 40 and so on how would i do that?

i know that i will start with something like this

if array = 1

Answer 1

[Star Strider]

I am not certain what result you want.

One approach:

array = [1 2 3 4];
target = [20 30 40 50];

Mapfcn = @(idx) target(array(idx));

Out = Mapfcn(array == 3)

Experiment to get your desired result.

[Raul Castillo]

sorry if i wasnt clear enough so form my array lets say s= [1 2 3 4 1 2 3 4 ]

and i want to assign 1=20 2=30 3=50 4=120 so that my new array would now be [20 30 50 120 20 30 50 120] do you get what i mean now?

Answer 2

[ME]

As in your previous question, you can use the following bit of code. I have also updated the error in my answer to your previous question.

for i=1:numel(s)
    if(s(i)==1)
        s(i)=20;
    elseif(s(i)==2)
        s(i)=30;
    elseif(s(i)==3)
        s(i)=50;
    elseif(s(i)==4)
        s(i)=120;
    end
end