Michele Giugliano

It's very useful but there is a conflict with the "legend" command.

Hmmm. Well I gave it a five, because it is easy. Now after using it there are a couple major bugs.

1) It does not output any handles, so you cant conveniently change plot details.

2) It does not allow you to pass a color to shade. So you are stuck with the default options. Errorshade2 can do this, but it is not as easy to implement and debug.

I really appreciated this as a starting point, however, like Raymond Reynolds wrote in a comment in 2006, it doesn't do well for overlapping intervals, because you cannot add/control the alpha of the shaded area. An easier, and more useful way to do the plotting is to replace the area with a patch command. This then allows you to directly control the shading and alpha of the area, the only caveat is that you must have bounded ends, so a check to set the first and last points to be the same in the shaded area is needed. I would be happy to send you my code that I edited to do this for you to update this, or (less desirable), I could upload my own version, but I think replacing with patches is a superior method and allows effective viewing of multiple shaded areas.