[Qgis-user] Colorize with values from attribute table

[Richard McDonnell]

Lene,
It will depend on your attributes and how you have set it up, but, under 
*Layer Properties*, *Style* the colours can be set using the *Data 
defined override* option (Form Icon) Click on this and select Edit, from 
her you can create the variables you want. On the right you will see a 
group called Colour, depending on how you specify your colour will 
depend on how you use this. For example say you have RGB values in three 
diferent columns, select *Colour* and then *colour_rgb* this will add 
*color_rgba(* to your expression, then using *Fields and Values*, select 
the appropriate Red, Green and Blue attributes from the table and close 
the brackets you should have something like *color_rgba("red", "green", 
"blue") *you will know it has worked, as the *Output Preview *on the 
bottom left will display the RGB value.
Similarly, if you have a single column for your RGB (formatted 
correctly) the same formula would be used, buy you would have a single 
field (column) in the expression.
Hope this is clear!
Regards,

Richard.





On 05/07/2016 10:53, Lene Fischer wrote:
>
> Hi,
>
> Looking for a tutorial for colorizing with values from the attribute 
> table.
>
> I have the RGB values, but can´t find a way to use it…
>
> Forund this old one – but the functions has changed a lot since. 
> http://shreshai.blogspot.dk/2014/10/display-with-color-symbology-from-data.html
>
> Ragards
>
> *Lene Fischer*
>
> Associate Professor
>
> *University of Copenhagen*
>
> Department of Geoscience and Natural Resource Management
>
> Forest and Landscape College
>
> Nødebovej 77a
>
> 3480 Fredensborg
>
> Denmark
>
> MOB +45 004540115084
>
> _lfi at ign.ku.dk_ <mailto:lfi at ign.ku.dk>
>
>
>
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-- 
*_Richard McDonnell_*
*GIS Specialist PgD GIS AssocSCSI*
*OPW FRM Data Management*
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