Re: [Gnuplot-info] Waterfall / Cascade Plot

[Ethan A M. <EAM...@gm...>]

On Thursday, 11 April 2013, howudodat wrote:
> I am trying to make a waterfall / cascade plot of csv data.  The data is 
> 8192 rows of data x 600 columns of time. The first column is a frequency
> label, the first row is shown below but doesn't actually exist in the data
> file, neither do the spaces, they are shown just for ease of reading.
> 
> Frequency, Sec1, Sec2, Sec3...Sec600
> 1e8, -95,  -90,  -92
> 1.1e8, -100, -101, -103
> ...
> 
> The data represents 600 seconds of fft data.  I would like the plot to look
> something like the attached image.  The x axis should be the columns of data
> (time), the y axis should be each row (frequency).  The z axis is intensity
> and I'm hoping can be displayed both in height as well as color.

General solution (no matrix treatment):

set datafile separator ","
set autotitle columnheader  # read a row of titles
unset key                                # but don't use it for anything
set grid x y z
set hidden3d
splot for [sec=1:600] 1:(sec):(column(sec+1)) with impulse lc palette

You may want to adjust the linewidth of the impulses,
the palette coloring scheme, etc.

There's probably a way to read it as a matrix also,
but I'm less sure of the syntax off the top of my head.



	Ethan


> I can control the input data if needed to remove the first column, but then
> I would need to be able to specify the start/ stop range of the labels
> 
> <http://gnuplot.10905.n7.nabble.com/file/n17268/test.png> 
> 
> 
> 
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> 
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