Quick plotting of a function

seq 0 0.1 20 | awk '{print $1, cos(0.5*$1)*sin(5*$1)}' | graph -T X
The arguments of "seq" indicate the starting value, step size, and the end value of the x-range. "awk" outputs (x, f(x)) pairs and pipes them to "graph", which is part of the "plotutils" package.

By: kaan
2009-03-24 21:46:59

What Others Think

very sweet. not much daily use for me tho.
linuxrawkstar · 651 weeks and 6 days ago
using 'gnuplot' would be much easier. echo 'plot cos(0.5*x)*sin(5*x)' | gnuplot -persist
jxy · 651 weeks and 5 days ago
Gnuplot is an alternative, yes, but not necessarily easier. By changing the seq arguments, you can change the x range and step size. Your example with Gnuplot doesn't do this unless you bloat the command with 'set xrange ...' etc. Of course, for finer tuning and better, one can create a gnuplot script. But this site is about one-line commands, and this command is meant only for a quick look at a function.
kaan · 650 weeks and 6 days ago

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

You must be signed in to comment.

What's this?

commandlinefu.com is the place to record those command-line gems that you return to again and again. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.

Share Your Commands

Stay in the loop…

Follow the Tweets.

Every new command is wrapped in a tweet and posted to Twitter. Following the stream is a great way of staying abreast of the latest commands. For the more discerning, there are Twitter accounts for commands that get a minimum of 3 and 10 votes - that way only the great commands get tweeted.

» http://twitter.com/commandlinefu
» http://twitter.com/commandlinefu3
» http://twitter.com/commandlinefu10

Subscribe to the feeds.

Use your favourite RSS aggregator to stay in touch with the latest commands. There are feeds mirroring the 3 Twitter streams as well as for virtually every other subset (users, tags, functions,…):

Subscribe to the feed for: