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<div>Hi Rick,</div>
<div>thanks a lot for your help. I try your suggestion. Now I get an markerColors array, but in the plot all markers still have the same color (black). I think the plot1 is overwritten each time. Do you have an idea how can I reach that every marker is drawn individuel and gets a different color?</div>
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<div>I have attached my script, my plot and my data.</div>
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<div>Thanks for your help.</div>
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<div>Anna
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<div style="margin:0 0 10px 0;"><b>Gesendet:</b> Dienstag, 14. Juli 2015 um 17:23 Uhr<br/>
<b>Von:</b> "Rick Brownrigg" <brownrig@ucar.edu><br/>
<b>An:</b> "Hartmut Bittner" <anna@hbittnersth.de><br/>
<b>Cc:</b> "ncl-talk@ucar.edu" <ncl-talk@ucar.edu><br/>
<b>Betreff:</b> Re: [ncl-talk] xy-plot with markers (depending on a 3. variable)</div>
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<div>Hi Anna,<br/>
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<div>You have this as your loop code:<br/>
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do i= 1, num_distinct_markers<br/>
res@xyMarkerColors = 2 + i* col_step* t(i)<br/>
;print(2+i*col_step)<br/>
plot1 = gsn_csm_xy (wks,x_1,y_1,res)<br/>
end do <br/>
draw(plot1)<br/>
frame(wks)<br/>
</div>
<div>I'm surprised this doesn't report errors, but it is generating "num_distinct_markers" unique *plots*, with all the markers of the i-th plot colored with the i-th color, and plot1 is overwritten each time, with the last plot prevailing. <br/>
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What I was suggesting was to create an array of colors "num_distinct_markers" long, and populate that with your marker colors, as in :<br/>
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<div> markerColors = new((/ num_distinct_markers /), integer)</div>
<div> do i=0, num_distinct_markers - 1</div>
<div> markerColors(i) = 2 + i*col_step * t(i)</div>
<div> end do<br/>
</div>
<div> res@xyMarkerColors = markerColors</div>
<div> plot1 = gsn_csm_xy(wks, x_1, y_1, res)<br/>
</div>
<div> draw(plot1)</div>
<div> frame(wks)<br/>
</div>
<div>This is untested, without having your data. Also note that in your example, you're indexing over 1..num_distinct_markers, whereas I'm looping from 0..(num_distinct_markers - 1). I'm not totally sure which is correct for your case.<br/>
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<div>Hope that helps...</div>
<div>Rick</div>
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<div class="gmail_quote">On Tue, Jul 14, 2015 at 6:31 AM, Hartmut Bittner <span><<a href="anna@hbittnersth.de" target="_parent">anna@hbittnersth.de</a>></span> wrote:
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<div>Hi,</div>
<div>
<div>I try to realize Ricks idea. But my problem is still that all my markers have the same color.</div>
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<div><em>My problem in generel is: I have 1 data set that consists of a x- position ( in my script: x), a y-position ( in my script: y) and a 3. value (for example the temperature, in my script: t). I want to creat an x-y plot with the x/y-position and the marker should be controlled by the 3. variable t. So that I have an 2D-Plot in which 3 variables are presented.</em></div>
<div><em>For exemple the color of the marker gets red for higher t-values and gets green for lower t-values.</em></div>
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<div>I made an loop over the "xyMarkersColors",but all makers have the same color. I want that the makers have different colors. I think for reaching this goal in every do loop only 1 markers has to be drawn. So that after n- loops all the n xyMarkers are drawn. How can I reach this? And how can I realize the dependent of the markersColors of variable t? If I put t into the do loop I get an segmentation fault.</div>
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<div>Thanks for your help</div>
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<div>Anna Lena</div>
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<div style="margin: 0 0 10.0px 0;"><b>Gesendet:</b> Donnerstag, 09. Juli 2015 um 19:26 Uhr<br/>
<b>Von:</b> "Rick Brownrigg" <<a href="brownrig@ucar.edu" target="_parent">brownrig@ucar.edu</a>><br/>
<b>An:</b> "Anna Lena Bittner" <<a href="anna@hbittnersth.de" target="_parent">anna@hbittnersth.de</a>><br/>
<b>Cc:</b> "<a href="ncl-talk@ucar.edu" target="_parent">ncl-talk@ucar.edu</a>" <<a href="ncl-talk@ucar.edu" target="_parent">ncl-talk@ucar.edu</a>><br/>
<b>Betreff:</b> Re: [ncl-talk] xy-plot with markers (depending on a 3. variable)</div>
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<div>Hi Anna,<br/>
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One approach is exemplified by example #8 at:<br/>
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<a href="http://ncl.ucar.edu/Applications/polyg.shtml" target="_blank">http://ncl.ucar.edu/Applications/polyg.shtml</a><br/>
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This approach draws the markers 1-by-1, looping over the marker array and setting the colors for each one based upon some criterion.<br/>
</div>
Another approach, more or less the same amount of effort, is to set up an array for the resource "xyMarkerColors" that contains a color value for each marker to be drawn. You'd need an array the same length as your xy data, and would have to loop over it to fill in each entry with a color value based on your 3rd variable.<br/>
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I note that you are already setting the resource xyMarkerColors with 2 colors. According to the documentation, if you have more xy data than color-values in xyMarkerColors, the remaining markers are drawn with the color set by the resource xyMarkerColor (singular) -- the default for that resource is whatever the foreground color (typically black). So what you should have gotten in your existing example is one green marker, one blue marker, and the remainder black (?) <br/>
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Make sense?<br/>
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Rick</div>
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<div class="gmail_quote">On Thu, Jul 9, 2015 at 10:25 AM, Anna Lena Bittner <span><<a>anna@hbittnersth.de</a>></span> wrote:
<blockquote class="gmail_quote" style="margin: 0 0 0 0.8ex;border-left: 1.0px rgb(204,204,204) solid;padding-left: 1.0ex;">Hi,<br/>
<br/>
I would like to create a xy-plot with markers. The markers should have different colors. The colors should be controlled by a 3. variable.<br/>
In my plot I already created the makers, but I don't know how to define the color with a 3. variable ( in my case the variable t).<br/>
I couldn't find a description for this kind of plot. If there is a description on the homepage let me know.<br/>
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I have attached my scripts here.<br/>
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<br/>
Thanks a lot for your help.<br/>
<br/>
<span><font color="#888888">Anna Lena</font></span><br/>
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