Data visualization with SAS programming

ODS Graphics with nested axis

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PROC Star
Posts: 1,290

ODS Graphics with nested axis

HI All,

I want to make a chart with what I'm thinking of as a "nested axis".

For example, conisder a barchart of sashelp.shoes with x=product y=sales.

Now suppose I want the x-axis to be nested, so x-axis could be Region*Subsidiary*Product.

And maybe the x-axis would look like (ASCII Art):

-------------------------------------------------------------------------------------------------------------------------------------------------
shoes             socks            shoes        socks          shoes             socks          shoes             socks 
        Boston                               NewYork                        Paris                                  Madrid
                            North America                                                         Europe

Is there a straightforward way to do that?

Looks like a similar approach is:

proc template;
  define statgraph myplot;
    begingraph;
      layout datapanel classvars=(Region Subsidiary) /
        rows=1
        headerlabeldisplay=value
      ;
        layout prototype ;
          barchart x=product y=Sales /stat=mean;
        endlayout;
      endlayout;
    endgraph;
  end;
run;

proc sgrender
  data=sashelp.shoes 
        (where=(Subsidiary IN ("Chicago" "Los Angeles" "Madrid" "Geneva") 
                and product=: "Men"
                )
         )
  template=myplot
;
run;

Wondering if folks would suggest another approach for this sort of grouping / nesting of an x-axis?

Second question: Assuming I stick with the DATAPANEL approach,  is there a way to get the value of the classvars to display on the bottom of each cell, rather than the top? (in 9.3)

Thanks,

--Q. 

SAS Super FREQ
Posts: 1,139

Re: ODS Graphics with nested axis

If a two-level axis is acceptable, it is easy.  Use the SGPANEL procedure.as shown in the 3rd graph in this blog article:

http://blogs.sas.com/content/graphicallyspeaking/2013/09/07/bar-charts-with-stacked-and-cluster-grou...

PROC Star
Posts: 1,290

Re: ODS Graphics with nested axis

Thanks Sanjay,

That blog post is great!

Users were hoping for a three-level axis, so I Iiked that datapanel supports n levels.

But I like your SGPANEL / DATALATTICE approach, it's definitely closer to what we drew on the white board.  I think I can convince them to put the third level of nesting on the /group=.

--Q.

PROC Star
Posts: 1,290

Re: ODS Graphics with nested axis

Ack, I pay the price for over-simplifying my example.

In real life I want to do this with a box plot, not a bar chart.  I tried:

proc template;
  define statgraph myplot3;
    begingraph;
      layout gridded;
        layout datalattice columnvar=region /
          headerlabeldisplay=value
          columnheaders=bottom 
          border=false
        ;
          layout prototype / ;
            boxplot =subsidiary y=sales;    
             endlayout;
        endlayout;
      endlayout;
    endgraph;
  end;
run;

And it throws:

ERROR 823-580: Computed plots and expressions cannot be used in this layout.


Fair enough, the docs say that as well. Boxplot is a no-go for layout prototype.

Then I tried SGPanel and it works:

proc sgpanel
  data=sashelp.shoes 
        (where=(Subsidiary IN ("Chicago" "Los Angeles" "Madrid" "Geneva") 
                and product=: "Men"
                )
         )
;
  panelby Region/ layout=columnlattice novarname noborder colheaderpos=bottom;
  vbox sales/group=product category=subsidiary;
  colaxis display=(nolabel);
  rowaxis grid;
run;

I haven't used SGPANEL.  I had assumed it was generating GTL code behind the scenes, like SGPLOT.  So I thought it wouldn't work with vbox.  But it does work.  Then I thought "Oh, let me see what GTL code SGPANEL is generating", and there is no TMPLOUT= option.

So a few questions:

1. SGPanel isn't generating GTL code???

2. Is there a way I can do what SGPanel is doing, with GTL code?

-- Was thinking even though layout prototype doesn't like box plots, looks like perhaps I could roll my own, using e.g. layout lattice, with one layout overlay block for each box plot

I'm not averse to following the SGPANEL route a bit.  It's just that often I end up doing enough crazy stuff with reference lines and html drill downs that I wind up back in GTL-land.

Thanks,

-Q.

SAS Super FREQ
Posts: 1,139

Re: ODS Graphics with nested axis

If thsi is a custom graph, you can annotate the macro level label under the axis.

The VBAR can be clustered without the stacks.

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