topic Re: Color scale for heat maps in QlikView

Color scale for heat maps

christian77 — Thu, 14 Aug 2014 10:51:16 GMT

Hi Qlikers:

I need to build a heat map, (not a random rainbow).

I'd like to have advise about how to make a correct color scale.

What funcktion to use, rgb, argb...

How to convert any sort of numbers into 0 - 255, etc.

Thanks in advance.

Re: Color scale for heat maps

DavidFoster1 — Thu, 14 Aug 2014 11:04:57 GMT

One option is to use the colormix wizard. You can access the wizard by going to the expression's background colour property and then opening the expression editor. In the file menu you will find the wizard.

Notes:

1) Stick to a simple colour scheme.

2) Only use it with relatively low granularity dimensions (i.e. the number of colours it will need to calculate) as the performance deteriorates quickly.

Re: Color scale for heat maps

Gysbert_Wassenaar — Thu, 14 Aug 2014 11:05:56 GMT

Perhaps you can use this document: ColorBrewerCommunity.qvw

Re: Color scale for heat maps

christian77 — Thu, 14 Aug 2014 11:35:26 GMT

Thank you both for your answers. They are both very helpful.

Salutations.

Re: Color scale for heat maps

MarcoWedel — Thu, 14 Aug 2014 13:37:15 GMT

Hi Chris,

maybe also helpful:

Sorted Heatmap example

regards

Marco