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Y-axis problems using cgcontour [message #85764]

Wed, 04 September 2013 12:42

morganlsilverman
Messages: 46
Registered: February 2013

Member

Hello,

I'm trying to use cgcontour to plot a latitude altitude cross section of temperature data. My altitudes are actually pressure values and I need them to go from 1000mb to 10mb with 1000mb being at the bottom of the y-axis. I know how to do this using cgplot but I can't figure out how to do the same when using cgcontour. I also would like to have a log scale if possible for pressure. Is it possible to do this? Thank you.

Sincerely,
Morgan

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Re: Y-axis problems using cgcontour [message #85765 is a reply to message #85764]

Wed, 04 September 2013 12:48

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Morgan Silverman writes:

> I'm trying to use cgcontour to plot a latitude altitude cross section of temperature data. My altitudes are actually pressure values and I need them to go from 1000mb to 10mb with 1000mb being at the bottom of the y-axis. I know how to do this using cgplot but I can't figure out how to do the same when using cgcontour. I also would like to have a log scale if possible for pressure. Is it possible to do this

Did you try reversing your Y vector?

Cheers,

David

--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.idlcoyote.com/
Sepore ma de ni thue. ("Perhaps thou speakest truth.")

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Re: Y-axis problems using cgcontour [message #85766 is a reply to message #85764]

Wed, 04 September 2013 12:57

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Morgan Silverman writes:

> I'm trying to use cgcontour to plot a latitude altitude cross section of temperature data. My altitudes are actually pressure values and I need them to go from 1000mb to 10mb with 1000mb being at the bottom of the y-axis. I know how to do this using cgplot but I can't figure out how to do the same when using cgcontour. I also would like to have a log scale if possible for pressure. Is it possible to do this? Thank you.

Here is an example of a plot that does what you want:

http://www.idlcoyote.com/gallery/index.html#ZONALCONTOUR

Cheers,

David

--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.idlcoyote.com/
Sepore ma de ni thue. ("Perhaps thou speakest truth.")

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Re: Y-axis problems using cgcontour [message #85767 is a reply to message #85766]

Wed, 04 September 2013 13:04

morganlsilverman
Messages: 46
Registered: February 2013

Member

On Wednesday, September 4, 2013 3:57:46 PM UTC-4, David Fanning wrote:
> Morgan Silverman writes:
>
>
>
>> I'm trying to use cgcontour to plot a latitude altitude cross section of temperature data. My altitudes are actually pressure values and I need them to go from 1000mb to 10mb with 1000mb being at the bottom of the y-axis. I know how to do this using cgplot but I can't figure out how to do the same when using cgcontour. I also would like to have a log scale if possible for pressure. Is it possible to do this? Thank you.
>
>
>
> Here is an example of a plot that does what you want:
>
>
>
> http://www.idlcoyote.com/gallery/index.html#ZONALCONTOUR
>
>
>
> Cheers,
>
>
>
> David
>
>
>
>
>
> --
>
> David Fanning, Ph.D.
>
> Fanning Software Consulting, Inc.
>
> Coyote's Guide to IDL Programming: http://www.idlcoyote.com/
>
> Sepore ma de ni thue. ("Perhaps thou speakest truth.")

Great. Thank you. I will follow that example.

-Morgan

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Re: Y-axis problems using cgcontour [message #85770 is a reply to message #85766]

Thu, 05 September 2013 07:51

Paul Van Delst[1]
Messages: 1157
Registered: April 2002

Senior Member

On 09/04/13 15:57, David Fanning wrote:
>
> Here is an example of a plot that does what you want:
>
> http://www.idlcoyote.com/gallery/index.html#ZONALCONTOUR

Sorry for the OT, but that gallery is a beautiful collection of plots.
It's been a while since I visited it - I was completely mesmerised.

cheers,

paulv

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Re: Y-axis problems using cgcontour [message #85771 is a reply to message #85770]

Thu, 05 September 2013 08:09

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Paul van Delst writes:

> Sorry for the OT, but that gallery is a beautiful collection of plots.
> It's been a while since I visited it - I was completely mesmerised.

I'm unemployed again and apparently too old to be hired to do anything
useful, so I've been thinking about another book, the working title of
which is "Coyote's Recipes for Dramatic IDL Visualizations". My idea is
to explain at some length how the plots in the gallery are created using
both Coyote Graphics and (if I can figure this part out) Function
Graphics. Think anyone would buy it?

If not, please suggest a book you *would* buy. I'm looking for good
ideas. :-)

Cheers,

David

--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.idlcoyote.com/
Sepore ma de ni thue. ("Perhaps thou speakest truth.")

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