undefined function 'displaytable' for input arguments of type double

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Im trying to plot correlataion matrix but im getting error like "undefined function 'displaytable' for input arguments of type double" >> % Correlation matrix of the data. (Figures 3 and 4) % Center X by subtracting off column means X0 = bsxfun(@minus,X,mean(X,1)); S = X0'*X0./(n-1);

%Mean vector, covariance matrix, and correlation matrix xbar = mean(X,1); [R,sigma] = corrcov(S);

corrmat = corrcoef(X); figure; imagesc(corrmat); set(gca,'XTick',1:p); set(gca,'YTick',1:p); set(gca,'XTickLabel',variables); set(gca,'YTickLabel',variables); axis([0 p+1 0 p+1]); grid; colorbar;

figure; displaytable(corrmat,variables); Undefined function 'displaytable' for input arguments of type 'double'.

pls help to solve this...