barweb.m calls the BAR and ERRORBAR MATLAB functions to produce bar graphs with error bars. The resultant graph is fully customizable, from group naming to legend inclusion to colormap setting. It assumes an m-by-n y-input matrix and plots m groups of n bars. The errorbar matrix must be setup the same way as the barvalues matrix (i.e. same dimensionality, matched values must have same indexes)

Syntax:
barweb(barvalues, errors, width, groupnames, bw_title, bw_xlabel, bw_ylabel, bw_colormap, gridstatus, bw_legend)