iPlot plots 1-D or 2-D matrices interactively. Data is plotted versus row indices.

- iplot(X) plots the columns in X (or their spectral amplitude) interactively, one at a time. X can be a matrix or a vector.

- iplot(X,Y,...) plots the columns in X,Y..., one above the other for easy comparison. All matrices must have equal size. One exception is allowed: if an input matrix other than Y is a vector, then the vector is replicated to match the number of columns in Y.

iPlot functionalities are triggered by pressing keys (see keyboard legend). Main functionalities include:

move forward or backward between the columns of the input matrix ["A" and "D" keys]
plots the spectral amplitude of the current column [ "F" key ]
various column ordering (sequential, std +, std -, random) ["R" key]