How to easily plot graph, using (preferably) free software?

How to easily plot graph, using (preferably) free software? I need to plot a graph, given some data, where on X axis will be names of data and on Y axis those data, and it will be given by a table, and it will be line graph with the data connected. If there was a possibility to draw more data into one graph, it's even better.
Asked by: Guest \| Views: 225

Total answers/comments: 4

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bert [Entry]

"Try R again. This time, use ggplot2. Here's an example of data points snagged from the website.

That graph was done using the built-in mtcars dataset, with the following code:

> p <- ggplot(mtcars, aes(wt, mpg))
> p + geom_point(aes(colour = factor(cyl)))

Stackoverflow.com has a small ggplot2 user base. Otherwise, the ggplot2 Google Group is a great place to ask questions."

bert [Entry]

"If you are looking for a solution you can program, try gnuplot. Many programs like R or octave can interact with gnuplot. Or you can run gnuplot standalone. It can read text files containing data and render them as plots. As far as line plots go, it can do anything from this:

to this

Some useful links:

Making plots using Ocatve, gnuplot & LaTex
Demo scripts for gnuplot 4.2
Gnuplot tutorial"

bert [Entry]

One other alternative is Google Chart Tools
One other alternative is Google Chart Tools

bert [Entry]

I found out Plot (mac os x only) is the thing I really like the most so far.