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Re: Multicolored dashed lines??? [message #45691 is a reply to message #45551]

Thu, 22 September 2005 05:23

Haje Korth
Messages: 651
Registered: May 1997

Senior Member

Good morning,
Thanks for everyone's help. Both Matt's and Bob's solutions work. I ran into
an additional problem, which made me go with the PLOTS procedure and the
color array Bob suggested.

The problem is that if the array to be plotted has a lot of elements, say
100000, the long dashed lines are turned into tiny pixels. This is clearly a
bug in IDL (this is v6.2 on Windoze) since the appearance of the line should
be independent of the size of the array. Right?

However, Bob's solution can be adapted to create a workaround to the
problem. That, is create the pattern first using a smaller array and then
blow it up with congrid. In the solution below there are always 100 dashes:

plots,findgen(100000l),findgen(100000l) +
5,linestyle=5,color=congrid((findgen(100) mod 2)*255,100000l)

Thanks and Cheers,
Haje

"Haje Korth" <haje.korth@nospam.jhuapl.edu> wrote in message
news:dgsgmn$s9c$1@aplcore.jhuapl.edu...
> Hi,
> Before I start coding something really crappy, I wanted to ask if anyone
> has a routine that can plot a multicolored dashed line (e.g.,
> black-white)? The purpose is to have a line that can be seen against
> arbitrary background colors, such as used in a color spectrogram.
>
> Thanks,
> Haje
>

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[Message index]

		Multicolored dashed lines??? By: Haje Korth on Wed, 21 September 2005 13:44
		Re: Multicolored dashed lines??? By: Haje Korth on Thu, 22 September 2005 05:33
		Re: Multicolored dashed lines??? By: Haje Korth on Thu, 22 September 2005 05:23
		Re: Multicolored dashed lines??? By: David Fanning on Wed, 21 September 2005 20:23
		Re: Multicolored dashed lines??? By: Andrew Cool on Wed, 21 September 2005 20:10
		Re: Multicolored dashed lines??? By: David Fanning on Wed, 21 September 2005 19:55
		Re: Multicolored dashed lines??? By: Andrew Cool on Wed, 21 September 2005 19:43

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