Shaded Error bar Problems

I need to plot the data with standerd deviation. I use "shadedErrorBar" command for plot. But every time I get "Undefined function or variable 'shadedErrorBar' ". Why I get this error and how can use the shadedErrorbar command?

[Adam Danz]

shadedErrorbar is not a matlab function. It's available on the file exchange if you don't already have it (google it). If you do have, make sure it's on your matlab path.