# [ncl-talk] question about drawing a contour plot

jaein song jaein_song at yonsei.ac.kr
Sun Mar 29 09:52:51 MDT 2015

```I've been tried using 1-dimensional data with sfXArray and sfYArray.
and then, the result was like figure below.
[image: 본문 이미지 1]
I think, this is a result of automatically interpolated data.

how should I remove those polygons?
I want that the figure appears like figure of former e-mail with coordinate
like this figure.

for this script, below was changed.

do pi=0,np-1                                    ;DO LOOP #4 PIN->TH

hfp             = mod(pin(pi),nh)
;??? nh? nh-1? not sure if nh and nt start from 0 or 1
tfp             = (pin(pi)-hfp)/nh
;hco(pi)                =h(hfp)
hco(pi)         = h(hfp)/1000
tco(pi)         = t(tfp)/86400*24
;zup(pin(pi))   = zp(pi)
end do

res at sfXArray             = tco
res at sfYArray             = hco
res at trXMaxF              = 24
res at trXMinF              = 0
res at trYMaxF              =  15
res at trYMinF              =0
res at lbOrientation        = "Vertical"
res at tiXAxisString        = "time(hour)"
res at tiYAxisString        = "height(m)"
res at tmXBLabelsOn        = True
res at tmYLLabelsOn        = True
plot = gsn_csm_contour(wks1,zp,res)

2015-03-30 0:44 GMT+09:00 jaein song <jaein_song at yonsei.ac.kr>:

>
> Hello, my name is Jaein Song and a graduate student of Yonsei University.
> I want to draw a figure with irregular coordinate variables of x axis. but
> it doesn't work well.
> the figure below is a output of the script (except the red box).
> the numbers in red box(at x axis) came from array number (if z(n,m)-> m
> appears)
> but, I wish that these numbers represent the time (t of included script).
> I think this problem appears because t is a irregular coordinate variable.
> but I don't know how should I do.
>
> below is information about variable which i want to draw.
>
> zup!0="h"
> zup!1="t"
> zup&h=h
> zup&t=t
>
>
> how should I do ?
>
>
>
> I attach the original data file and the script.
>
> [image: 본문 이미지 5]
>
> below is the error message (Warning)
> warning:_NhlCreateSplineCoordApprox: Attempt to create spline
> approximation for X axis failed: consider adjusting trXTensionF value
> warning:IrTransInitialize: error creating spline approximation for
> trXCoordPoints; defaulting to linear
>
>
>
>
> --
> *Jae In Song (Master's course)*
> Cloud Physics Lab
> Department of Atmospheric Sciences, Yonsei University.
>
> 120-749
> Science hall #530A, Yonsei-ro 50
> Seodaemun-gu, Seoul, S.Korea
>
> Lab: +82-2-2123-7613
> Mobile: +82-10-9045-9209
>
>
>
>
>
> --
> *Jae In Song (Master's course)*
> Cloud Physics Lab
> Department of Atmospheric Sciences, Yonsei University.
>
> 120-749
> Science hall #530A, Yonsei-ro 50
> Seodaemun-gu, Seoul, S.Korea
>
> Lab: +82-2-2123-7613
> Mobile: +82-10-9045-9209
>
>
>

--
*Jae In Song (Master's course)*
Cloud Physics Lab
Department of Atmospheric Sciences, Yonsei University.

120-749
Science hall #530A, Yonsei-ro 50
Seodaemun-gu, Seoul, S.Korea

Lab: +82-2-2123-7613
Mobile: +82-10-9045-9209
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```