-------- Graphing functions --------
histo : Plot a histogram pairs : Pairwise scatter plots of the columns of x pairs_d : demo of pairs (pairwise scatterplots) plt_turns : plot turning points in a time series plt_turnsd : demo of fturns() pltdens : Draw a nonparametric density estimate. pltdens_d : demo of pltdens (non-parameter density plot) tsplot : time-series plot with dates and labels tsplot_d : demo of tsplot (time-series plot)