How to define depth axis in log scale

[ramesh <kv_ramesh@xxxxxxxxxxxxxx>]

Dear ferret users,
 
        I wish to plot  a graph
with latitude vs depth.
In this I wish to plot the depth in log(z), but at the
same time I wish to put the depth value.
Please help me to plot this.

Thanks in advance.

with regards,
Ramesh

begin:vcard 
n:K.V.;Ramesh
x-mozilla-html:FALSE
org:IITM;CGMD
adr:;;;;;;
version:2.1
email;internet:kv_ramesh@tropmet.res.in
title:P.hD. Student
x-mozilla-cpt:;3128
fn:Ramesh K.V.
end:vcard