Microarray-Gene fold change calculation - (Nov/24/2014 )

Hi Members,

Can someone explain how to find for ex, 2 fold up or down regulated genes from micro array intensity data using only excel?

I think this question is basic and am new to this filed, but  really want to know the calculation of 'x' fold expression from intensity dataset.  

It would be helpful if you can tell me steps to do in a layman's manner.

My dataset is like,

                Control            Treated

Gene1      7.4365             8.1134

Gene2      8.6785            11.234

Gene3      9.3233            6.8965

Gene4      8.6531           14.3475

Thanks,

Ubuntu...

A quick google search will give you all the information you need, including examples and even templates too.