<div dir="ltr">Hi:<div><br></div><div>Do you really want to include the < 0 part of your color bar?</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Aug 2, 2017 at 2:51 PM, Michael Weston <span dir="ltr"><<a href="mailto:mjweston@masdar.ac.ae" target="_blank">mjweston@masdar.ac.ae</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000">
Dear NCL users,<br>
<br>
This question has been asked many times. However, I wonder if a more
elegant solution has been found in the mean time.<br>
E.g subjects in this group, but these do not answer my question<br>
<br>
Making zero value white in contour plot (Jake Huff)<br>
Re: Making zero value white in contour plot (Mary Haley)<br>
Re: Making zero value white in contour plot (Dennis Shea)<br>
<br>
I have also tried:<br>
Getting the colour index (<i>get_color_index</i>), setting the
colour index to another colour using <i>NhlSetColor</i><i><br>
</i><br>
I have tried these links<br>
"How to coincide zero with the white color of the colo bar with
uneven numbering"<br>
<a class="m_2480953898124925383moz-txt-link-freetext" href="http://mailman.ucar.edu/pipermail/ncl-talk/2014-November/001361.html" target="_blank">http://mailman.ucar.edu/<wbr>pipermail/ncl-talk/2014-<wbr>November/001361.html</a>
<br>
This involves indexing a 256 color palette to the colours you want
in your 16 level map/color bar. <br>
<br>
combined with <br>
<br>
<a class="m_2480953898124925383moz-txt-link-freetext" href="http://www.ncl.ucar.edu/Document/Functions/Built-in/get_color_index.shtml" target="_blank">http://www.ncl.ucar.edu/<wbr>Document/Functions/Built-in/<wbr>get_color_index.shtml</a><br>
<br>
However, none have really hit the nail on the head despite my
efforts. And I imagine this must be much simpler than indexing a 256
color scheme.<br>
<br>
What I want: <br>
1. I want to make a map using filled contours, but I want zero to be
represented by white.<br>
I can achieve this by making all zero values missing values.<br>
2. I want to have a color bar next to my map, with zero represented
by white.<br>
I can not achieve this.<br>
<br>
My map is attached.<br>
As you can see it is beautiful, except, I would like to get rid of
the delightful purple and dark blue in the color bar. (i.e. first
two classes.)<br>
<br>
Is this possible?<br>
<br>
Thanks and regards<br>
Michael<br>
<br>
<br>
general overview of code below<br>
<br>
sfile = addfile(srcFileName,"r")<br>
TMP = sfile->var_index<br>
TMP = where(TMP.ne.0,TMP,TMP@_<wbr>FillValue) ;MAKE ZERO MISSING<br>
<br>
res@cnFillOn = True<br>
res@cnFillMode = "RasterFill" ; Raster Mode<br>
res@cnConstFEnableFill = True<br>
res@cnLinesOn = False<br>
res@cnLineLabelsOn = False<br>
<br>
res@cnLevelSelectionMode = "ExplicitLevels"<br>
res@cnLevels = fspan(0,1,10)<br>
cmap = read_colormap_file("<wbr>BlueYellowRed")<br>
res@lbLabelBarOn = True<br>
res@lbLabelStrings =
(/"0","0.1","0.2","0.3","0.4",<wbr>"0.5","0.6","0.7","0.8","0.9",<wbr>"1"/)<br>
res@lbOrientation = "Vertical"<br>
wks = gsn_open_wks("png","ncl_map")<br>
plot = gsn_csm_contour_map(wks,TMP,<wbr>res)<br>
draw(plot)<br>
frame(wks)<br>
delete(wks)<br>
<br>
<div class="m_2480953898124925383moz-signature">-- <br>
<br>
<div class="m_2480953898124925383moz-signature">
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<br></blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr">Barry H. Lynn, Ph.D<div><div>Senior Lecturer,</div><div><div><span style="color:rgb(136,136,136)">The Institute of the Earth Science, </span><br style="color:rgb(136,136,136)"><span style="color:rgb(136,136,136)">The Hebrew University of Jerusalem, </span><br style="color:rgb(136,136,136)"><span style="color:rgb(136,136,136)">Givat Ram, Jerusalem 91904, Israel </span><br style="color:rgb(136,136,136)"></div><span style="color:rgb(136,136,136)">Tel: 972 547 231 170</span><br style="color:rgb(136,136,136)"><span style="color:rgb(136,136,136)">Fax: (972)-25662581</span></div></div><div><span style="color:rgb(136,136,136)"><br></span></div><div>C.E.O, Weather It Is, LTD<br>Weather and Climate Focus<br><a href="http://weather-it-is.com" target="_blank">http://weather-it-is.com</a><br>Jerusalem, Israel<br>Local: 02 930 9525<br>Cell: 054 7 231 170<br>Int-IS: x972 2 930 9525<br>US 914 432 3108<br></div></div></div>
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