errShade(x,y,ePlus,​eMinus,lineCol,line​Width,lt)

Simple code to plot a shaded error region and a curve that goes through it.

This code plots a shaded error region and a curve that goes through it on any type of 2-D plot (e.g. semilog, loglog, regular plot). Note: You must first specify the plot type by plotting a curve before calling this function. The recommended usage is to plot your curve first, then call the function which will overplot the error region and curve.
Usage:
INPUTS:
x - array of x values for line
y - array of y values for line
ePlus - upper error value above the line (i.e. maxError(x)-y(x))
eMinus - lower error value below the line (i.e. y(x)-minError(x))
lineCol - color of line (either string: 'r'-red, or RGB triplet)
lineWidth - width of line
lt - lightness (mix ratio of color with pure white) [Note: 0.2 works quite nicely with common MATLAB colors 'r','b']

OUTPUT:
cH - handle of plotted curve
eH - handle of shaded error region