legend on map plot

Hi,

I have problem to put legend on plots.

(1) ftp://ftp.caps.ou.edu/users/yli/ike-minslp.ncl
      put legend at wrong place.

(2) ftp://ftp.caps.ou.edu/users/yli/ike-track.ncl
      does not work for legend at all.

If you know NCL legend, please help me

just type

 ncl ike-track.ncl
 ncl ike-minslp.ncl

Thanks.

Yongzuo
________________________________________

Today's Topics:

   1. Re: Making pressure-height plot with equally spaced pressure
      level (Mary Haley)

----------------------------------------------------------------------

Message: 1
Date: Wed, 6 Jan 2010 10:28:56 -0700
From: Mary Haley <haley@ucar.edu>
Subject: Re: Making pressure-height plot with equally
        spaced pressure level
To: Jeff <jeffelf@gmail.com>
Cc: ncl-talk <ncl-talk@ucar.edu>
Message-ID: <A13754AF-7655-4214-A804-B01A4C9C92BF@ucar.edu>
Content-Type: text/plain; charset="us-ascii"

Hi Yaosheng,

I didn't see your attachment, but I think I know what the solution
might be.

The problem you are referring to is illustrated in example #1 on our
"axes" applications page:

http://www.ncl.ucar.edu/Applications/axes.shtml

Click on both thumbnail images, and you will see how the Y axis changes.

If you simply want to linearize the Y axis, then use gsn_csm_contour
as before,
but additionally set the resource:

   res@gsnYAxisIrregular2Linear = True

--Mary

On Jan 5, 2010, at 9:33 PM, Jeff wrote:

> Hi, Mary,
>
> Thanks for reply. I tried your method but the result is not what I
> need.
>
> When you use gsn_csm_pres_hgt to make plots of zonal mean of a
> variable in a 3D data, it does not matter which pressure levels the
> data include.
>
> For example, if data1 contains 6 equally spaced levels on 1000, 800,
> 600, 400, 200, 0 mb and data2 contains 6 levels on 1000, 990, 950,
> 900, 700, 400, 0 mb, the axis in final plots will look the same. I
> mean, the right axis of height is always equally spaced. So it is like
> there is a pre-setup frame, and data are put into the frame.
>
> However, using gsn_csm_contour, each level will occupy a row of same
> width in the figure. Use the 6 levels example I mentioned above, the
> distance between 1000 and 900 will be same as that between 900 and 0
> mb.
>
> Enclosed is a figure from gsn_csm_contour. The space between 800 and
> 600 in Y axis is larger than that between 600 and 400, because I have
> more model layers (or more rows of data in the 2d variable I'm going
> to plot) between 800 and 600 than between 600 and 400. But what I want
> is equally spaced Y axis.
>
> Although it may work, I don't want to interpolate the data to equally
> spaced pressure levels since it may introduce some error.
>
> Looking forward to your help. Thank you very much.
> Yaosheng
>
> On Tue, Jan 5, 2010 at 11:47 AM, Mary Haley <haley@ucar.edu> wrote:
>>
>> You are on the right track with the idea of setting up
>> coordinates. You can
>> use the coordinate array feature if your coordinates are 1D.
>>
>> That is, you must have a 1D array of altitude values that has the
>> same
>> number of points as the leftmost dimension of your data array, and
>> a 1D
>> array of latitude values that has the same number of points as the
>> rightmost
>> dimension of your data array.
>>
>> If your data array is called "X", your altitude values "ALT", your
>> latitude
>> values "LAT", then you can set up the metadata for "X" so that you
>> can plot
>> it using gsn_csm_contour:
>>
>>
>> X!0 = "alt" ; Name X's dimensions
>> X!1 = "lat"
>> X&alt = ALT ; Using the names we just created,
>> X&lat = LAT ; attach the coordinate arrays to X
>>
>> Now, if you plot X:
>>
>> plot = gsn_csm_contour(wks,X,res)
>>
>> it will see the coordinate arrays attached to X, and you should
>> have the
>> correct values on your X and Y axis.
>>
>> --Mary
>>
>> On Jan 4, 2010, at 10:34 AM, Jeff wrote:
>>
>>> Hi, Sir/Madam,
>>>
>>> I would like to make plots of zonal mean of some variable, that
>>> is, a
>>> plot with altitude as Y-axis versus latitude as X-axis.
>>> However, all examples I found on NCL website using equally spaced
>>> height as Y-axis.
>>> How can I use equally spaced pressure or sigma level as Y-axis?
>>>
>>> I also checked examples for general contour plots. They may serve
>>> well. However, the example is too simple for me to follow. I have no
>>> idea about how should I setup coordinates for the variable to
>>> plot so
>>> that NCL can understand Y-axis is altitude and X-axis is latitude or
>>> whatever coordinate. Is there a detailed example?
>>>
>>> Thank you very much.
>>> Yaosheng Chen
>>> _______________________________________________
>>> ncl-talk mailing list
>>> List instructions, subscriber options, unsubscribe:
>>> http://mailman.ucar.edu/mailman/listinfo/ncl-talk
>>
>>
> _______________________________________________
> ncl-talk mailing list
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