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<div style="direction: ltr;font-family: Tahoma;color: #000000;font-size: 10pt;">Hi there,
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<div>Is it possible to change a single color in an already constructed color map to transparent?</div>
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<div>As an example: I wish to use the "hotcold_18lev" color table, but wish to change the white to transparent. I do not have editing permission to the NCARG root hence cannot change the RGBA value directly. Is it possible to change it within the NCL script?</div>
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<div>Initially, I tried this:</div>
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<span style="font-variant-ligatures: no-common-ligatures">cmap = read_colormap_file("hotcold_18lev")</span></p>
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<span style="font-variant-ligatures: no-common-ligatures">cmap(10:11,) = 0.0 ; makes whites transparent</span></p>
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res@cnFillColors = cmap</p>
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<font size="2">Yet received the error:</font></p>
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</font></p>
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<span style="font-variant-ligatures: no-common-ligatures">fatal:Error in subscript, normal subscripting is being used, make sure named subscripting has not been used</span></p>
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<span style="font-variant-ligatures: no-common-ligatures;"><font size="2">which is related to the "cmap(10:11,)" line. </font></span></p>
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</font></span></p>
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<font size="2">Thanks in advance!</font></p>
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<font size="2">Ty</font></p>
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