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Re: Postscript plots squished and a plot tick problem. [message #16140 is a reply to message #15948]

Fri, 02 July 1999 00:00

Grady Daub
Messages: 22
Registered: June 1999

Junior Member

I just wrote an entirely new program and the "always starting at zero" problem
is happening again. (I hope the problem is the same for both programs.)

After much experimenting and complianing and general disgust, I think I have
discovered the problem.

My XTICKV values were:

39047.2 39047.2 39047.2 39047.2 41067.2

But, this didn't seem to affect the plot. IDL just made up it's own tick
values. (Which, incidentally, were the ones I wanted.)

I then tried to put back all the stuff I took out while experimenting. I could
only reproduce the "always starting at zero" problem by making
XTICKV=XTICKV(k), where k comes from "for k=..."

Your guess at my problem seems to have been correct.

I've found the evil badness that has caused all this pain.

It is:

In real life, 1/4 = 0.25
In IDL, 1/4 = 0

:-(

Can somebody tell me why?

Harald Frey wrote:

> 2. You did not provide a sample program but what I assume happens here is
> that you improperly use the xticks and xtichv in your call.
>
> Just try this
> a=findgen(20)+9.
> plot,a,a,xticks=5,xtickv=findgen(6)*4+9
>
> But if you try
>
> plot,a,a,xticks=6,xtickv=findgen(6)*4+9
>
> you will always start at 0 and in yout PS output x-values may be plotted
> one on top of the other.

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[Message index]

		Postscript plots squished and a plot tick problem. By: Grady Daub on Sat, 26 June 1999 00:00
		Re: Postscript plots squished and a plot tick problem. By: Harald Frey on Mon, 28 June 1999 00:00
		Re: Postscript plots squished and a plot tick problem. By: davidf on Fri, 02 July 1999 00:00
		Re: Postscript plots squished and a plot tick problem. By: Grady Daub on Fri, 02 July 1999 00:00
		Re: Postscript plots squished and a plot tick problem. By: davidf on Fri, 02 July 1999 00:00
		Re: Postscript plots squished and a plot tick problem. By: Grady Daub on Fri, 02 July 1999 00:00

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