[ncl-talk] 回复：Fwd: Could I add some FillPatterns effect suchasobliquelines to a raster fill plot ?

Tue Aug 25 04:00:29 MDT 2015

Hi, Adams

  Thank you for the reply. I've tried another some times, but failed to get something. I don't know how the NCL
make the fill pattern exactly, and I guess that there is not enough grids (only 19*3 grids ) in my plot, so NCL can not
deal with few grids correctly.
  Here below is the data used in the first subplot , and you can see that no fill pattern were done for the 3rd column
values. In fact, I want all the grids with the values less than 0.05 to be filled with oblique lines.

significance values for the trend
0.055 0.055 0.000
0.000 0.000 0.000
0.000 0.055 0.000
0.000 0.007 0.000
0.055 0.055 0.000
0.000 0.001 0.000
0.055 0.000 0.000
0.055 0.000 0.000
0.000 0.055 0.000
0.000 0.055 0.000
0.000 0.037 0.000
0.002 0.003 0.000
0.000 0.055 0.000
0.000 0.055 0.000
0.000 0.055 0.001
0.002 0.055 0.055
0.001 0.055 0.000
0.000 0.055 0.000
0.000 0.000 0.002

Besides, I want to ask one more question:

I add the follwoing scripts to post all the values to the corresponding cells (so that I can understand why NCL can not contour correctly) :
    res at cnFillOn       = False
    plot(i) = gsn_csm_contour(wks, sig, res)
   text        = new(dimsizes(sig),"string")
    text        = sig
    lon         = ispan(1,3,1)
    lat         = ispan(1,19,1)
    txres        = True
    txres at txFontHeightF = 0.015
    txres at txJust    = "CenterLeft"
    dummy   = gsn_add_text(wks,plot(i),text,lat,lon,txres)
however, I got some error message as below:
fatal:Dimension sizes of left hand side and right hand side of assignment do not match
fatal:["Execute.c":7743]:Execute: Error occurred at or near line 5659 in file $NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_code.ncl
fatal:["Execute.c":7743]:Execute: Error occurred at or near line 118 in file dtr_sat_raster.ncl

Lin

原始邮件
发件人:Adam Phillipsasphilli at ucar.edu
收件人:xianglin72xianglin72 at icloud.com
抄送:ncl-talk at ucar.eduncl-talk@ucar.edu
发送时间:2015年8月25日(周二) 02:04
主题:Fwd: [ncl-talk] Could I add some FillPatterns effect suchasobliquelines to a raster fill plot ?

Hi Lin,

(ncl-talk included)

Method #2 is the way to go, and I still think you should be able to do it by modifying and using trial and error on the following lines:

sig = where(sig.le.0.05,sig,0.06)
res2 at cnLevels = 0.05

For instance, I would try the following:
sig = where(sig.le.0.05,sig,0.15)
res2 at cnLevels = 0.045 

and if that doesn't work try this:
sig = where(sig.le.0.05,sig,0.055)
res2 at cnLevels = 0.045

You should notice the range of the the pattern fill changing.

You might have to try modifying the above two settings several times before you get it right, but it should be quite possible to match up the 2 plots.

I am also wondering whether this line is correct:
plot(i) = gsn_csm_contour(wks, y, res)

I think it should be:
plot(i) = gsn_csm_contour(wks, sig, res)

as you want to compare the exact same field raster and color filled to one pattern filled. The array y is based on this line:

y = where(sig.le.0.05,dtr,-999.) ; significant trend

and contains dtr data as opposed to sig data.

If you cannot get the plot or do not wish to go through the trial and error process you can attempt to draw polylines through each significant grid box, but as I indicated previously this can get tedious.

If you have any further questions please respond to ncl-talk.
Adam

On Sun, Aug 23, 2015 at 10:13 AM, xianglin72 xianglin72 at icloud.com wrote:

Hi, Adams,

  I've tried for sometimes, but it seems that this problem is unresolvable.

1、
res at cnFillMode      = "RasterFill" 
plot(i) = gsn_csm_contour(wks, y, res)
opt = True
opt at gsnShadeFillType = "pattern"   ; pattern fill
opt at gsnShadeMid    = 3          ; use pattern #2 
plot(i)  = gsn_contour_shade(plot(i), -0.01, 0.05, opt)
……..
no fillPattern will be done.

2、
  y          = where(sig.le.0.05,dtr,-999.) ; significant trend
   y at _FillValue = -999.
   res at cnFillMode      = "RasterFill" ; “CellFill“
  plot(i) = gsn_csm_contour(wks, y, res)

   sig      = where(sig.le.0.05,sig,0.06)
   res2 at cnFillMode     = "AreaFill" ;"AreaFill"
   res2 at cnMonoFillPattern = True
   res2 at cnFillPattern   = 3
   res2 at cnMonoFillColor  = False
   res2 at cnFillColors    = (/"black","black","white","white"/)
   res2 at cnLevelSelectionMode = "ExplicitLevels"
   res2 at cnLevels       = (/0.,0.05,0.1/)
   iplot  = gsn_csm_contour(wks, sig, res2)
   overlay(plot(i),iplot)
   …...
 Then the cnFillPattern can not be shown as preferred. (see the attached fig file, All the significant values have been raster filled in the corresponding rectangular cell, all the shaded lines should also be added within these cells as expected, )

Thanks

LIn

原始邮件
发件人:Adam Phillipsasphilli at ucar.edu
收件人:xianglin72xianglin72 at icloud.com
抄送:ncl-talk at ucar.eduncl-talk@ucar.edu
发送时间:2015年8月23日(周日) 12:24
主题:Re: [ncl-talk] Could I add some FillPatterns effect such asobliquelines to a raster fill plot ?

Hi Lin,
You are correct, you cannot raster fill and pattern fill at the same time. However, I remembered that I replied to someone with this issue in April. See the response here:
http://mailman.ucar.edu/pipermail/ncl-talk/2015-April/002370.html
In short: you need to manipulate the values of the boxes that are not hatched so that the pattern fill only covers the boxes that you want. Note in the example coding that the user had _FillValue(s); you may or may not have that set for the boxes you do not want pattern filled.

The above referenced method requires trial and error, but it is possible to do what you want.

An alternative to the above would be to make many calls to gsn_add_polyline, drawing a line across each grid box, but that method may be intensive to implement as well.

Good luck. If you have any other inquires please respond to ncl-talk.
Adam

On Aug 21, 2015, at 10:05 PM, xianglin72 xianglin72 at icloud.com wrote:

Hi, Adam

   Thank you the reply. I've tried what you have told before sending the first mail( see the attached script), however, I can not get what you and I expect ( see the attached plot).
   I've checked the explaination on the resource of "raster fill", and found the following :

 The following resources can be used to control fill features whencnFillModeis set toRasterFill:
cnFillColorscnGridBoundFillColorcnMissingValFillColorcnOutOfRangeFillColorcnRasterSmoothingOncnRasterMinCellSizeFcnRasterSampleFactorFcnRasterCellSizeF

  So you can find that the cnMonoFillColor and cnFillPattern can not work for this mode, which I've said in the first mail.

  Since the "AreaFill" mode can not get the same effect and the "cnFillPattern" resource can not be used for "CellFill" and
"rasterfill" mode, I still don't know how to add some shading effect for the chosen raster grids. 

Thanks

Lin

原始邮件
发件人:Adam Phillipsasphilli at ucar.edu
收件人:xianglin72xianglin72 at icloud.com
抄送:ncl-talk at ucar.eduncl-talk@ucar.edu
发送时间:2015年8月22日(周六) 02:19
主题:Re: [ncl-talk] Could I add some FillPatterns effect such as obliquelines to a raster fill plot ?

Hi Lin,

You can always do an overlay where you create two images:

1) Create a RasterFill plot with colors. (You already have this plot.)

2) Create a RasterFill plot with pattern fill (not color fill).

Then you would overlay 2) on 1) using the overlay procedure. 

See example #10 here:
http://www.ncl.ucar.edu/Applications/overlay.shtml#ex10

Note that for plot 2) (or plot_shade in example 10) you would want to set the following resources:

res at cnFillPattern = 3 

res at cnMonoFillColor = True

res at lbLabelBarOn = False ; no labelbar needed

Available fill patterns:
http://www.ncl.ucar.edu/Document/Graphics/Images/fillpatterns.png

Hope that helps. If not, please respond to ncl-talk.

Adam

On Fri, Aug 21, 2015 at 8:44 AM, xianglin72 xianglin72 at icloud.com wrote:

Hi, all

  I've made a raster fill plot ( see the attachment), and I want to add some FillPattern effect for some chosen cells in the plot.

However, I found that the resource of cnFillPattern can not work for the raster fill plot.  How could I do to add some effect,

for example, some oblique lines to the chosenrectanglar cells?  

Thanks

Lin

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-- 

Adam Phillips 

Associate Scientist, Climate and Global Dynamics Laboratory, NCAR

www.cgd.ucar.edu/staff/asphilli/ 303-497-1726

test2.eps
dtr_sat_raster.ncl

-- 

Adam Phillips 

Associate Scientist, Climate and Global Dynamics Laboratory, NCAR

www.cgd.ucar.edu/staff/asphilli/ 303-497-1726
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