Re: white line at longitude 0

Hi,

I just try anthoer bw plot. There is same thing with vertical white line
at center (a gap is not plotted at the Greenwich Meridian), with the
.hluresfile in my home directory and put res_at_gsnAddCyclic function. I
don't know what caused this problem. This problem is nothing to do with
NCL?
Please see my another plot:
http://dust.ess.uci.edu/chaoluo/fig7_bw.pdf

Thanks,
Chao

>
>
> cluo_at_uci.edu wrote:
>> Hi all,
>>
>> I have a troble to make the black and white plot. There is always a
>> white
>> line at longitude 0, from latitude -90 to +90. I have no idea how to do
>> it.
>> Here's URLs of my plot and ncl script.
>> http://dust.ess.uci.edu/chaoluo/fig10_bw.pdf
>> http://dust.ess.uci.edu/chaoluo/test_bw.ncl
>>
>> Thanks in advance for any help or suggestions!
>
> [1] Are you talking about the horizontal "white line"
> at the top and bottom of the plot? If so, then
> I speculate your grid does not extend to the poles.
> eg: a gaussian grid, or one that spans (say)
> -89 to +89.
> In these cases there are no data at the poles.
>
> [2] I think it has been mentioned before, please put the
> following .hluresfile in your home directory.
> Amongst other things it makes helvetica the default
> font.
>
> http://www.ncl.ucar.edu/Document/Graphics/hlures.shtml
>
> [2] Why are you doing
>
> do ilev=0,27
> do ilat=0,93
> do ilon=0,191
> deltp(ilev,ilat,ilon)=(hyblev(ilev+1)-hyblev(ilev))*sufp(ilat,ilon)
> end do
> end do
> end do
>
> There is a function for this:
>
>
> http://www.ncl.ucar.edu/Document/Functions/Built-in/dpres_hybrid_ccm.shtml
>
> It is fast and you do *not* need to preallocate the array "deltp"
>
> [3] General rule for programming .... do not hardwire sizes.
> In your do loop:
>
> do ilev=0,klvl-1
> do ilat=0,nlat-1
> do ilon=0,mlon-1
>
> [4] Use NCL's array syntax it is much faster and cleaner
>
> replace
>
> do ilev=0,27
> do ilat=0,93
> do ilon=0,191
> bcwet_tot(ilat,ilon)=bcwet_tot(ilat,ilon)+bcwet(ilev,ilat,ilon)
> end do
> end do
> end do
>
> with
> do ilev=0,klvl-1
> bcwet_tot = bcwet_tot + bcwet(ilev,:,:)
> end do
>
>
>
>>
>> Chao
>>
>> _______________________________________________
>> ncl-talk mailing list
>> ncl-talk_at_ucar.edu
>> http://mailman.ucar.edu/mailman/listinfo/ncl-talk
>

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Received on Mon Sep 24 2007 - 13:14:31 MDT