Ask Your Question

Plotting with logarithmic scaling for the 'x' axis?

asked 2012-06-24 03:14:21 -0500

anonymous user


Hey! Would appreciate very much a bit of help:

I have an Array of data of Positions Vs. Time intervals, where Time goes from 0 to 10000, and every slot on the array represents a time interval of 100. The question is - is there any way to plot the data in the array using, but with a logarithmic scaled 'x' axis ? Meaning - labels running as - 10^(-4), 10^(-3), ..., 10^5?

Thank you!

edit retag flag offensive close merge delete

2 answers

Sort by ยป oldest newest most voted

answered 2012-06-24 10:28:46 -0500

calc314 gravatar image

updated 2012-06-24 10:44:06 -0500

There is a ticket for such a thing at From the notes there, it is not quite ready.

You can see the answer to a similar question at log-log plots.

Matplotlib has a LogFormatter that you also might be able to use, but I haven't got it working at the moment. It does not appear that using the tick_formatter in show will let you call this LogFormatter, but I might be missing something here.

edit flag offensive delete link more



Actually, has positive review! Hopefully it will still apply on Sage 5.1. You are right that you have to be a little carefully about the formatters - see the patches at that ticket for more info.

kcrisman gravatar imagekcrisman ( 2012-06-25 05:46:08 -0500 )edit

answered 2012-08-03 01:05:49 -0500

v_2e gravatar image

updated 2012-08-04 08:45:17 -0500

Since Sage 5.2 it's as simple as

list_plot(data_array, scale='semilogx') # Logarithmic scale for X-axis
list_plot(data_array, scale='semilogy') # Logarithmic scale for Y-axis
list_plot(data_array, scale='loglog') # Logarithmic scale for both axes
edit flag offensive delete link more

Your Answer

Please start posting anonymously - your entry will be published after you log in or create a new account.

Add Answer

Question Tools

1 follower


Asked: 2012-06-24 03:14:21 -0500

Seen: 1,290 times

Last updated: Aug 04 '12