topic Re: Color gradient for Visual Analytics 8.2 heat map in SAS Visual Analytics

Color gradient for Visual Analytics 8.2 heat map

SundareshS — Wed, 13 Jun 2018 15:50:48 GMT

Hi all

I have been working with correlation matrices off and on, without thinking about this aspect too much ( one indication that perhaps it is not very important), but I noticed the following ,and wondered if there is a way to change it ?

- The gradient options provide for a starting color and an ending color (I would assume it is from lowest to highest like we generally perceive measures)

- However, the actual gradient is shown based on strength - weak to strong - therefore for -0.95 (strong negative) and 0.95 (strong positive), the same green color is depicted

- While I still find it useful (it helps in basic inference of variable relationships ), wouldnt there be value in changing this to a three color gradient - something like red - white - green, so that

* anything close to 0 (weak or almost no correlation) is white

* large positive correlation values are higher on the green scale

* large negative values are higher on the red scale

Perhaps convention dictates the current gradient, but I thought I will put this as a suggestion anyways. I understand there will be some internal feature request mechanism at SAS so perhaps this has been dealt with already.

regards

Sundaresh

Re: Color gradient for Visual Analytics 8.2 heat map

avigdo — Sat, 16 Jun 2018 11:07:29 GMT

Try using ‘rules’. Didn’t try it myself but in the TreeMap object, I could over ruled that gradient, using ‘rules’. Pls let me know if it worked

Re: Color gradient for Visual Analytics 8.2 heat map

SundareshS — Fri, 29 Jun 2018 17:41:47 GMT

Thank you very much ! (and sorry for a late reply, it has been a while since I logged in last) - unfortunately display rules are disabled for a correlation matrix - I guess it is because of the gradient measure out there - I was wondering whether to try out a custom chart (and then import that custom chart) or either an external chart object - but haven't got around to doing the same. Also - the correlation matrix calculates coefficients on the fly so I wanted to avoid the data prep beforehand..... Thanks again !

Re: Color gradient for Visual Analytics 8.2 heat map

Filipvdr — Thu, 02 Jan 2020 14:09:22 GMT

Any solution for this?

We got the same in VA 7.5. When looking into the css we only have a start and end color.

<![CDATA[
#ve56 .TwoColorRamp {
fill-gradient-start-color: #F8F9FA;
fill-gradient-end-color: #000000;
}
]]>