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| Re: Y-Axis: Negitive numbers on top [message #1529 is a reply to message #1515] |
Tue, 30 November 1993 15:13  |
Ann_Mazuk
Messages: 5
Registered: November 1993
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Junior Member |
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In article <2dgd4b$1t6@news.u.washington.edu>, deutsch@astro.washington.edu
(Eric Deutsch) wrote:
> In article 301193095555@bundy.aero.org, Ann_Mazuk@qmail2.aero.org (Ann Mazuk) writes:
>
>> I am running IDL 3.1.0 using VAX/VMS. I am making a plot and on the y-axis
>> I want negative numbers to be near the top of the y-axis and positive
>> numbers to be near the bottom of the y-axis, such that it looks similar to
>> this:
>>
>>
>> -3 |
>> -2 |
>> -1 |
>> 0 |
>> 1 |
>> 2 |__________________________
>> 1 2 3 4 5 6 7 8 9 10
>
> The initial solution is simply to use something like:
>
> IDL> plot,indgen(10)-8,yrange=[2,-10]
>
> The tricky part comes when you want to have automatic Y scaling and have it
> reversed. An ugly solution is:
>
> IDL> plot,indgen(10)-8
> IDL> plot,indgen(10)-8,yr=[!y.crange([1,0])]
>
> Anyone have a better solution?
Many people have sent me email (thanks!) with what is probably the easiest
solution. That is to do:
IDL> plot,x,y,yrange=[2,-9]
Ann
>
> Eric
>
>
>
> Eric Deutsch Email: deutsch@astro.washington.edu
> Department of Astronomy FM-20 Voice: (206) 543-1979, 2922
> University of Washington FAX: (206) 685-0403
> Seattle, WA 98195 Johnson Hall, Room 226
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^^^^
Ann Mazuk Internet:
Ann_Mazuk@qmail2.aero.org
El Segundo, CA SPAN: DIRAC2::AMAZUK
Boring Disclaimer: These opinions are my own!
Zak! Don't eat parsley! Just for looks!
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| Re: Y-Axis: Negitive numbers on top [message #1531 is a reply to message #1529] |
Tue, 30 November 1993 13:14 |
deutsch
Messages: 19
Registered: February 1992
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Junior Member |
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In article 301193095555@bundy.aero.org, Ann_Mazuk@qmail2.aero.org (Ann Mazuk) writes:
> I am running IDL 3.1.0 using VAX/VMS. I am making a plot and on the y-axis
> I want negative numbers to be near the top of the y-axis and positive
> numbers to be near the bottom of the y-axis, such that it looks similar to
> this:
>
>
> -3 |
> -2 |
> -1 |
> 0 |
> 1 |
> 2 |__________________________
> 1 2 3 4 5 6 7 8 9 10
The initial solution is simply to use something like:
IDL> plot,indgen(10)-8,yrange=[2,-10]
The tricky part comes when you want to have automatic Y scaling and have it
reversed. An ugly solution is:
IDL> plot,indgen(10)-8
IDL> plot,indgen(10)-8,yr=[!y.crange([1,0])]
Anyone have a better solution?
Eric
Eric Deutsch Email: deutsch@astro.washington.edu
Department of Astronomy FM-20 Voice: (206) 543-1979, 2922
University of Washington FAX: (206) 685-0403
Seattle, WA 98195 Johnson Hall, Room 226
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