I am having some trouble with interpreting the outputs of the function "pca" in matlab. If I have a 10x15 matrix, with each row of the matrix corresponding to an observation, and each column corresponding to a variable, and I use that matrix as an input into the "pca" function, I see that the first two principal components explain ~90% of the variance in the data set by looking at the output variable "explained". My question is: Which variables in the original input matrix do these two principle components correspond to? Is there any way of knowing? In other words, which column of variables explains the majority of the variance in the data set? Thank you.