function [NormVar] = normalize_var(var)
%this function normalizes a vector into z scores. 
NormVar = zeros(length(var(:,1)),1);
Mean = mean(var(:,1));
Std = std(var(:,1));
for i = 1:length(NormVar(:,1))
    NormVar(i,1) = ((var(i,1)-Mean)/Std);
end
end