Make specific array from another array elements

The problem:

''Write a m.file which is asking to enter array X (integer numbers),which will make a new array Y .Elements of the array Y are sum from even digits of elements array X. If some element of array X is not inteneger,make a comment about error.

For example X = [81, 19, 102, 22, 12, 21] Y = [8, 0, 2, 4, 2, 2]

[Jan]

This sounds like a homework question. It would not be useful, if the forum solves your homework, so you will not get a solution here. Post, what you have tried so far, and ask a specific question about Matlab. Then you will get assistence for solving the specific problem.

[Jovan Jovovic]

The problem is that its exam question.And i have exam in 2 days.I learn best from example,because i can't find solution how to make subarray from the array.However i got algorithm of the solution in the head,i just don't know to write it properly.

From my knowlege i would do it smh like this.

x=input('input array X');

y=[]

s=0

for i=1:length(x)

while k<0

k=(i)

d=rem(k,10)

if rem(d,2)==0

s=s+d

k=fix(k,10)

y=[k]

I know its not working,but logic of my solution is.

We took first element of the array x.

There is a k that will have same value.There is a d which will be our detector of the digit ,if that number can be divide with 2 ,it means that its even,so s(sum) will be s+that number.After that we need to take a look over next digit of the first element.We are doing that by shorting fix/floor function,,and doing it until the we get to the zero.

When we got the zero,we are moving to next element.

Answer 1

[Walter Roberson]

Y = zeros(size(X));
for IndexBackM7 = 1 : numel(Y)
    ValueToWorkWIthBackM7 = X(IndexBackM7);
    now calculate for ValueToWorkWIthBackM7
    Y(idx) = ResultOfCalculationBackM7
end