Matlab construction operation example

Problem description ： Take out from the low position s The number on the middle even digit , Form a new number and put it in t And output as an integer .

for example ： When s Medium The number of ：7654321 when ,t Medium The number of ：642.

clc;clear;
s=input(' Please enter s:');
y=ceil(log10(s));
s=num2str(s);
for i=1:floor(y/2)
    t(i)=s(2*i);
end
t=str2num(t);
disp(t);