I am trying to generate a figure of some genomic data. Basically, I want to show how many times a certain event happens within each one megabase window of each chromosome. The X axis is the chromosomal position (unit is megabases) and the Y axis is chromosome number (1-19, X, Y, M in mouse). For each chromosome, I want a subplot on which I will draw a bar graph. So basically, there will be 22 subplots, each with their own axes, and also X and Y axes for the entire figure.

I know how to do subplots, I just don't know how to get the overall figure axes. Can anyone help?

I will try to sketch out below with some ascii art what I want in case this description isn't clear.

> >>>>>>>>>>> > > >>>> >>>> >

1 |--------------------------------------

> >>>> >> >>>>>>> >>>>>

2 |--------------------------------------

>

. |

>>>>> >> > > >>> >>>> >>

19 |--------------------------------------

> >>>>>> > >>> > > >>

X |--------------------------------------

>> >>> >>>>>

Y |--------------------------------------

> >> >>>>> >>>>>

M |--------------------------------------

## ···

--------------------------------------

0 50 100 150 200

Megabases

Thanks!

--

John Didion

Computational Biology, PhD Student

Fernando Pardo-Manuel de Villena Lab

UNC Chapel Hill