how to find values in two different vectors ?

I have two vectors e.g.

a=[2 7 9 10 17 22 24 28 29 32]

b=[74 79 82 85 88 91 92 95 96 97 98 99 102 108 121]

I want to find several values in two vector. for example 9, 24 , 85 and 102.

I first make

m=[9;24;85;102]
for i=1:size(m,1)
mt=find (a==m (i))
if a==0
else mtt=find (b==m(i))
end
end

However, when I run such script I cannot see which value is in which vector because each time mt or mtt will be empty in next epoch. I want to have the find result in mt for each run and if it is empty , I want to mention zero

for example I want to have mt and mtt as follows

mt=[3 7]
mtt=[4 13]

Thanks

[Azzi Abdelmalek]

You could just ask for a. You can do the same thing for b

Answer 1

[Azzi Abdelmalek]

a=[2 7 9 10 17 22 24 28 29 32];
b=[74 79 82 85 88 91 92 95 96 97 98 99 102 108 121]
m=[9;24;85;102]
mt=find(ismember(a,m))
mtt=find(ismember(b,m))

[Niki]

Azzi, Thank you very much for your help. This works just fine but I want to know where my problem is when I use loop as above mentioned. can you please help me with it?

[Azzi Abdelmalek]

I can't explain what your code is doing, I can propose one correct way to do it with a for loop

a=[2 7 9 10 17 22 24 28 29 32];
b=[74 79 82 85 88 91 92 95 96 97 98 99 102 108 121];
m=[9;24;85;102];
mt=[];
mtt=[];
for i=1:size(m,1)
  mt=[mt find(a==m(i))];
  mtt=[mtt find(b==m(i))];
end
mt
mtt