This function put an errobar range onto plot
errobar_plus(x,y,e) errobar_plus(x,y,em,ep) errobar_plus(...,prop) errobar_plus(...,prop,dir)
property string like for plot()
vertical or horizontal direction of error
t=[0:0.1:2*%pi]'; y=[sin(t) cos(t)]; x=[t t]; plot2d(x,y) nan_errorbar(x,y,0.05*ones(x),0.03*ones(x)) x = 1:10; y = sin(x); e = nan_std(y)*ones(x); nan_errorbar(x,y,e,'r^') draws symmetric error bars of unit standard deviation.'