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<p>Hi Barry<br>
</p>
<p>So I can define the classes manually as below (although this is a
tradeoff):</p>
<p> res@cnLevelSelectionMode = "ManualLevels"<br>
res@cnMinLevelValF = 0.1 ; set min contour
level<br>
res@cnMaxLevelValF = 1 ; set max contour
level<br>
res@cnLevelSpacingF = 0.1 ; set contour
spacing<br>
</p>
<p> res@lbLabelStrings =
(/"0.1","0.2","0.3","0.4","0.5","0.6","0.7","0.8","0.9","1"/)<br>
</p>
But it still creates a purple box in the color bar.<br>
Is this what you had in mind?<br>
<br>
Thanks<br>
Mike<br>
<br>
<div class="moz-cite-prefix">On 02/08/2017 16:41, Barry Lynn wrote:<br>
</div>
<blockquote
cite="mid:CAN7Bv267vRekMze2MsNdfDxgCHxJ_03axEzqo-UJJD99+-1HgA@mail.gmail.com"
type="cite">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<div dir="ltr">Hi:
<div><br>
</div>
<div>The easiest thing to do is just define your color bar
manually, and your intervals not to include 0. You then set
the leftward most color to white.</div>
<div><br>
</div>
<div>I am not sure if there is an easier way.</div>
<div><br>
</div>
<div>Do you need help with this?</div>
<div><br>
</div>
<div>Barry</div>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Wed, Aug 2, 2017 at 3:31 PM, Michael
Weston <span dir="ltr"><<a moz-do-not-send="true"
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">
<p>Hi <br>
</p>
No not really. What line in the code is causing it to be
included? <br>
My understanding from both these lines is that it starts
at zero.<br>
<br>
res@cnLevels = fspan(0,1,10)<br>
...<span class=""><br>
res@lbLabelStrings =
(/"0","0.1","0.2","0.3","0.4", </span>
<div bgcolor="#FFFFFF" text="#000000"><span class="">"0.5","0.6","0.7","0.8","0.9",<wbr>"1"/)<br>
<br>
</span> Mike<br>
</div>
<div>
<div class="h5"> <br>
<br>
<div class="m_-1865265935508319278moz-cite-prefix">On
02/08/2017 16:21, Barry Lynn wrote:<br>
</div>
<blockquote type="cite">
<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
moz-do-not-send="true"
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 moz-do-not-send="true"
class="m_-1865265935508319278m_2480953898124925383moz-txt-link-freetext"
href="http://mailman.ucar.edu/pipermail/ncl-talk/2014-November/001361.html"
target="_blank">http://mailman.ucar.edu/piperm<wbr>ail/ncl-talk/2014-November/<wbr>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 moz-do-not-send="true"
class="m_-1865265935508319278m_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/Docume<wbr>nt/Functions/Built-in/get_<wbr>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@_FillVa<wbr>lue)
;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("BlueYellow<wbr>Red")<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,re<wbr>s)<br>
draw(plot)<br>
frame(wks)<br>
delete(wks)<br>
<br>
<div
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<div dir="ltr">Barry H. Lynn, Ph.D
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<div dir="ltr">Barry H. Lynn, Ph.D
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