How to plot a linear fit (or Ordinary Least Squares)?

Hi, I have to analyze some data and put them in a graphics.

I have a matrix with the mean and another one (with the same size) of the standard deviation.

Each matrix is 6x21. I want to plot 6 different curvers of the mean with a line for the standard deviation, something like that:

But with 6 curves in the same plot (Each row of the matrix will be a curve of the graph).

How can I do it?

[Rik]

Looks like what errorbar will do. You can change the NextPlot property with the hold function.

[HelpAStudent]

How? Can you give me the code?

[Rik]

Sure:

doc errorbar
doc hold

Have a read here and here as well.