[Qgis-user] features that represent TWO attributes

[Junior]

Hi Steve,
Let's take the single symbol renderer http://docs.qgis.org/testing/en/docs/user_manual/working_with_vector/vector_properties.html#single-symbol-renderer (also linked in the previous text I sent), the data-defined override button is the figure available after "width" spinbox in the screenshot. And this set of options in the right is the so called "upper level", when the upper symbol in the left panel is being selected. The place where you find the size assistant. If I'm not wrong, for point features, the option to use is called "size" not "width".

Note that in your case, you want to do a multivariate analysis....

To go further:
Given that there are some generic structure in the way Qgis handles features styling, the doc is organized in a way to be less redundant (for readers and translators), so for a beginner you may need to follow the links mentioned in the text to build the whole picture (don't worry, no need to read all the doc :) ), namely:
- the two already shown
- http://docs.qgis.org/testing/en/docs/user_manual/working_with_vector/style_library.html#the-symbol-selector

Ask if you need more precision...

Envoyé depuis mon HTC

----- Reply message -----
De : "Stephen Sacks" <sacks44 at earthlink.net>
Pour : "DelazJ" <delazj at gmail.com>
Objet : [Qgis-user] features that represent TWO attributes
Date : ven., mai 13, 2016 16:24

Hi Harrissou -

   Thank you for taking time to provide to me the link below.  It
seems to be exactly what I need.  Unfortunately, I'm stuck at the
very beginning, where the instructions say to click the
"Data-defined override button" at the "upper level of the symbol
tree."   Since I'm very new to QGIS, I don't know how to find the
"upper level of the symbol tree" and hence I can't locate the
"Data-defined override button."  Please provide me with more
guidance.

            Thanks.

                    Steve







On 5/13/2016 12:14 AM, DelazJ wrote:







Hi, 



Steve, can you give a look to http://docs.qgis.org/testing/en/docs/user_manual/working_with_vector/vector_properties.html#proportional-symbol-and-multivariate-analysis?





HTH,



Harrissou





2016-05-13 1:27 GMT+02:00 Stephen Sacks
<sacks44 at earthlink.net>:



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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