How to use Stem Plot in MATLAB | MATLAB solutions
stem( X , Y ) plots the data sequence, Y , at values specified by X . The X and Y inputs must be vectors or matrices of the same size. Additionally, X can be a row or column vector and Y must be a matrix with length(X) rows. If X and Y are both vectors, then stem plots entries in Y against corresponding entries in X .For more visit https://www.matlabsolutions.com/