Fit scale of multi logarithmic graph

Dear ROOTers

I have 6 files with two columns for each one
I draw the first column ((on x-axis)) Vs. the second ((y-axis)) by read the files to a tree and then using the method draw

I need to group all the graphs in one pad but it is appear a problem in the scale
how i can put one scale for all graphs

in attachments
all.C the macro for all graphs
other txt files are the data

ROOTTALK.tar.gz (9.87 KB)