Re: How to plot ....................
- To: mathgroup at smc.vnet.net
- Subject: [mg59418] Re: How to plot ....................
- From: Bill Rowe <readnewsciv at earthlink.net>
- Date: Tue, 9 Aug 2005 03:30:48 -0400 (EDT)
- Sender: owner-wri-mathgroup at wolfram.com
On 8/8/05 at 3:34 AM, tkghosh at mp.okayama-u.ac.jp (T. K. Ghosh)
wrote:
>Suppose I have a data file with the extension filename.dat. This
>data file has more than 2 columns, say there are 3 columns. I would
>like to plot column 1 vs column 2 and similarly column 1 vs column
>3 on the same frame. I can easily plot this data file using GNU
>plot. Is it possible to use Mathematica to plot such a data file?
Yes. For example:
First generate some data
test = Table[{x,x+Random[],x^2/10+Random[]}, {x, 10}];
then plot it
Show[
Block[{$DisplayFunction = Identity},
{ListPlot[Most /@ test, PlotStyle -> Red],
ListPlot[test[[All,{1, 3}]]]}]];
Here, I've used Block to temporarily set $DisplayFunction to Identity in order to surpress the output of the ListPlot expressions. Then Show does the work of combining the plots and displaying them.
Another way to achieve the same effect would be to use the DisplayTogether function in the Graphics`Graphics` package.
Another thing you might want to consider is the PairwiseScatterPlot in the Statistics`StatisticsPlots` package. With a single command, it produces a plot of every column vs every other column in a data matrix. If there are not too many columns in the data matrix, this is great for rapidly evaluating relationships in data.
For example, with the data above, try
<<Statistics`
PairwiseScatterPlot[test];
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