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Re: [Matplotlib-users] [matplotlib-devel] RFC: candidates for a new default colormap
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From: Sourish B. <sou...@gm...> - 2015-06-05 21:35:08
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<div class="moz-cite-prefix">On 06/05/2015 12:44 PM, Jody Klymak
wrote:<br>
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<div class="">On 5 Jun 2015, at 11:39 AM, Sourish Basu <<a
moz-do-not-send="true"
href="mailto:sou...@gm..." class="">sou...@gm...</a>>
wrote:</div>
<br class="Apple-interchange-newline">
<div class=""><span style="font-family: LucidaSans-Typewriter;
font-size: 12px; font-style: normal; font-variant: normal;
font-weight: normal; letter-spacing: normal; line-height:
normal; orphans: auto; text-align: start; text-indent:
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auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;
background-color: rgb(255, 255, 255); float: none;
display: inline !important;" class="">This problem is
reasonably common for me, BTW. I can have a carbon
monoxide field with an average/background of 60 ppb, but
variations from 30 to 550 ppb. So I need a color scale
which (a) is white at 60, and (b) shows small variations
below 60 and large variations above 60 with equal
"clarity”.</span></div>
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<div>If you need to see small changes at low values and they are
equally important to large changes at high values, then taking
the logarithm is often useful (or scaling your colorbar
logarithmically). <br>
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<br>
Which would still have the problem that similar color
saturations/values at the two ends of the colorbar would represent
different (linear) distances away from the median/"zero" value.<br>
<br>
But I see your point, in my specific example the confusion is made
worse because the two ends have the same sat/val, just different
hues. Lately I've started 'sandwiching' different types of colorbars
(see attached) to get around that issue.<br>
<br>
Cheers,<br>
Sourish<br>
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<div>Cheers, Jody</div>
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<div class="">--</div>
<div class="">Jody Klymak </div>
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href="http://web.uvic.ca/%7Ejklymak/" class="">http://web.uvic.ca/~jklymak/</a></div>
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<div class="moz-signature">-- <br>
<b>Q:</b> What if you strapped C4 to a boomerang? Could this be an
effective weapon, or would it be as stupid as it sounds?<br>
<b>A:</b> Aerodynamics aside, I’m curious what tactical advantage
you’re expecting to gain by having the high explosive fly back at
you if it misses the target.<br>
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