Drawing a bar chart with multiple groups in the x axis and error bars!

Hi all,

I have 7 column matrices with 5 points each saved as t1p2, t1p1, t2p2, t2p1, t3p2, t3p2 and t4p1. (these have already been saved in my workspace)

Example of t1p1:

75
80
85
90
95

All of the 7 matrices need to be under one grouped name 'E100'. There need to be 5 of these on the x axis! So for e.g. E100 has 7, then E98 has 7 etc.

Lastly, I would like to add error bars with specific values to each matrix, which needs to correspond to each one of the 't1p2' (etc.) matrices.

I hope it makes sense. Please let me know if you have any questions or if you can even help with one part of it.

Please help...

Many many thanks,

Jai