Question

I am trying to find a way to make two lists the same length. How can I add zeros to one list so as to make it have the same length with the first one?

i.e. list1=[ 1 2 3 4 5]; list2=[ 1 2 3]

Answer 1

There are many ways you can do that. One of them is

list3 = zeros(size(list1)); %# create an array of the same shape as list1
list3(1:numel(list2)) = list2(:); %# fill in the elements defined in list2

Another way is

list3 = [list2, zeros(1,length(list1)-length(list2))];

Both of these ways assume that list2 is shorter than list1.