One option:
V1 = rand(26000,1); % Create Data
V2 = rand(29000,1); % Create Data
V12 = V1 .* V2(1:numel(V1)); % Element-Wise Multiplication Of First 26000 Rows
Another option (if you do not want to discard the last 3000 rows) is to interpolate the larger vector to be the length of the shorter vector, using the interp1 funciton.
