Re: ListPlot and List problem
- To: mathgroup@smc.vnet.net
- Subject: [mg10912] Re: [mg10814] ListPlot and List problem
- From: seanross@worldnet.att.net
- Date: Thu, 12 Feb 1998 20:15:55 -0500
- References: <199802110201.VAA13558@smc.vnet.net.>
Lars Freund wrote:
>
> Hi,
>
> I want to plot data that is stored in a file having in the format:
>
> <frequence> <phase> <amplification>
>
> and want to plot the BODE-Diagram. So I did:
>
> myData = ReadList["filename",{Number, Number, Number}];
>
> and now want a plot from <phase> over <frequence> and <amplification>
> over <frequence>I tried things like
>
> ListPlot[Transpose[testData][[3]],PlotJoined->True]
>
> but I always got the wrong list-format. I need
>
> {freqence1,phase1},{freqence2, phase2}...
>
> and I always get things like
>
> {phase1, phase2, phase3} or so.
>
> Can anybody help me a bit?
>
> Thanks,
>
> Lars
Assuming myData is a 3xn matrix and you want a 2xn matrix using the
first two columns, Then
Transpose[{Transpose[myData][[1]],Transpose[myData][[2]]}]
should do the trick.
--
Remove the _nospam_ in the return address to respond.
- References:
- ListPlot and List problem
- From: lafreund@cip.e-technik.uni-erlangen.de (Lars Freund)
- ListPlot and List problem