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Re: plot & oplot [message #40689 is a reply to message #40688]

Tue, 24 August 2004 00:52

Chris Lee
Messages: 101
Registered: August 2003

Senior Member

In article <cge3ri$kq6$1@agate.berkeley.edu>, "Marshall Perrin"
<mperrin+news@cymric.berkeley.edu> wrote:

> IDLmastertobe <shi_lee@hotmail.com> wrote:
>> If I was to plot a 1-d function, and wanted to do an oplot on the same
>> window, how would I hide sections of the oplot that goes underneath the
>> plot. I eventually want to do multiple oplots and hide sections that
>> fall underneath the previous oplot. Please help.
> Just plot your functions from 'back' to 'front'. Each oplot will
> overplot (hence the name!) everything that came before.
> - Marshall

Unless you want 'underneath' in the vertical axis sense, not the z-axis
sense.

You can use polyfill, with the background color, to block out anything
under the line you plot.

e.g
;some data
x=findgen(101)
y1=x
y2=100-x

plot, x,y1 ;the first data
;cover up everything underneath the second line
polyfill, [x, reverse(x)], [y2, replicate(min(y2),n_elements(x))],color=0
;plot the second line
oplot, x,y2
;replot the axis
plot, x, y1,/nodata,/noer
;

Chris

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[Message index]

		Re: plot & oplot By: Paolo Grigis on Tue, 24 August 2004 01:16
		Re: plot & oplot By: Chris Lee on Tue, 24 August 2004 00:52
		Re: plot & oplot By: mperrin+news on Mon, 23 August 2004 17:58

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