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Re: PLOT question [message #22966 is a reply to message #22964]

Thu, 21 December 2000 03:46

Stuart Colley
Messages: 17
Registered: February 2000

Junior Member

Maybe a small example will be of help - hopefully it will be a bit clearer
than my first message. Imagine a periodic signal (sin wave for example)
and we are plotting more than one cycle, Normally the signal would be
plotted as a function of time, e.g:

y value |
| x x
| x x x x
__ _|__________________x__________________x_____
time | 0 1 2 3 4 5 6 7 etc...

What I want to do is swap time for phase angle, so the phase is
somewhere between 0 - 2pi, but the problem is that the phase angle
repeats, so what I was looking for on the axis was something
like:

y value |
|
| x x
| x x x x x
________|__________________x_____________________x__________ _
time | 0 pi/2 pi 3pi/2 0 pi/2 pi 3pi/2 0 etc...

|
end of first cycle, start of second

What I'll probably do is use xtickv and xtickname to set the ticks, since
as far as I can tell, you MUST 'plot, t, y' to get the plot right,
'plot, phase, y' results in the data being merged together and only one
cycle being plotted.

The reason I sent the first post - I was wondering if there was an easier
way than xtickv/xtickname since it can't automatically choose the tick
values like PLOT can, and isn't so flexible when I'm trying to write a
general purpose routine. Time for some more code I think....

cheers,
S

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[Message index]

		Re: PLOT question By: Martin Schultz on Thu, 21 December 2000 09:44
		Re: PLOT question By: Jaco van Gorkom on Thu, 21 December 2000 06:05
		Re: PLOT question By: Stuart Colley on Thu, 21 December 2000 03:46
		Re: PLOT question By: davidf on Wed, 20 December 2000 16:40
		Re: PLOT question By: Craig Markwardt on Wed, 20 December 2000 16:14
		Re: PLOT question By: Craig Markwardt on Wed, 20 December 2000 16:01
		Re: PLOT question By: Paul van Delst on Wed, 20 December 2000 10:51
		Re: PLOT question By: Dave Greenwood on Wed, 20 December 2000 10:32
		Re: PLOT question By: davidf on Wed, 20 December 2000 10:16

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