[Qgis-user] features that represent TWO attributes

[Stephen Sacks]

I'm trying to create a layer with features that reflect two attributes.  
I want each point to be marked by a circle whose (1) color reflects its 
type (city, town, or suburb), and whose (2) size reflects its population.
   From layer properties, I first select Style and choose "Categorized" 
based on column "Type."  This gives me circles with different colors for 
different types.  Then I choose "Graduated" based on column 
"Population."  This gives me circles with different sizes.  
Unfortunately, setting the sizes wipes out the different colors.  I've 
tried setting the sizes first, but then setting the colors wipes out the 
different sizes.  How do I set both size and color ?
    I'm using QGIS 2.14.1 on Windows 7.
    Thanks in advance for your help.

Steve


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