topic Re: Coloured Scatter Diagram in Graphics Programming

Coloured Scatter Diagram

rebeccabarton — Sun, 14 May 2017 21:03:44 GMT

Hi,

I'm trying to create a scatter plot with two continuous variables. I'd then like to colour the plots according to a third, categorical variable.

Is this possible?

My code so far is

proc sgplot data = sasuser.data1;
scatter x = tradingyears y = sales2015;
run;

Re: Coloured Scatter Diagram

Reeza — Sun, 14 May 2017 21:56:33 GMT

Of course!

Try adding the third variable as a GROUP var in your scatter statement. Example 1 in the documentation covers this

http://support.sas.com/documentation/cdl/en/grstatproc/69716/HTML/default/viewer.htm#n06fb9ichgg6akn18060gbtvw9pw.htm

If you want to control the colours see the post below

http://blogs.sas.com/content/iml/2012/10/17/specify-the-colors-of-groups-in-sas-statistical-graphics.html

Possibly more than you need now, but good to know:

http://blogs.sas.com/content/iml/2017/01/30/auto-discrete-attr-map.html

Re: Coloured Scatter Diagram

rebeccabarton — Sun, 14 May 2017 22:16:04 GMT

Thanks, this is perfect, is it also possible to set the colour of the whole plot simply?

Re: Coloured Scatter Diagram

Reeza — Sun, 14 May 2017 22:56:32 GMT

I'm not sure what you mean by 'whole plot'?

Colours are usually defined by the Style set. If you're using SAS Studio this is likely HTMLBlue. For publications the style Journal/Journal1 are good. For a clean compact look, I like the Seaside and Meadow styles. Finally, there's a post on here that has the style definition in the style of Stephen Few.

Re: Coloured Scatter Diagram

rebeccabarton — Sun, 14 May 2017 23:00:24 GMT

Sorry I meant if I wanted to change the colour of the plots, when not splitting by the categorical variable. So just each dot.

Re: Coloured Scatter Diagram

Rick_SAS — Sun, 14 May 2017 23:23:03 GMT

See "Three ways to specify colors in SAS statistical procedures." Also see the documentation for the SCATTER statement, especially the MARKERATTRS= option.