Use multiple "markercolorgradient" in one ODS plot ?

[kelloggs]

Hi everybody,

I am trying to create a scatterplot X~Y with two different groups, each group should have a distinct color (Group 1 = Red, Group 2 = Blue) as well as a groups-specific gradient coloring based on a third variable Z (Group 1: Light red to dark red, Group 2: Light blue to dark blue).

So far I succeeded in creating either

- a scatterplot with the groups colored in red / blue (using proc sgrender with "scatterplot / group = Z")

OR

- a scatterplot with a single gradient coloring for both groups:

proc template; 

/* colors for gradient coloring*/

define style styles.gradient;

parent = styles.default;

  style GraphColors /

   'gconramp3cstart'   = "light red"

   'gconramp3cneutral' = "red"

   'gconramp3cend'     = "dark red"

end; 

/* Scatterplot with a single gradient coloring */

define statgraph gradientscatter;

  begingraph;

   layout overlay;        

   scatterplot x = X1 y = Y1 / markercolorgradient = Z 

   name = "scattergrad";

   scatterplot x = X2 y = Y2 / markercolorgradient = Z 

   name = "scattergrad";

   endlayout;

  endgraph;

end;

run;

/* Draw Scatterplot */

ods html style = styles.gradient;

proc sgrender data = &indata. template = gradientscatter; run;

Anybody got an idea how this could be done?

Since I need to plot  some 100k observations, I believe proc sgrender is the way to go, but of course I'd happily accept any other solution using ODS graphics.

Thanks!

Regards

[DanH_sas]

Try something like this and see if it works for you:

proc template; 

/* colors for gradient coloring*/

define style styles.gradient;

parent = styles.default;

   class ThreeColorRamp /

      StartColor = "light red"

      NeutralColor = "red"

      EndColor = "dark red"

   ;

   class ThreeColorAltRamp /

      StartColor = "light blue"

      NeutralColor = "blue"

      EndColor = "dark blue"

   ;

end; 

/* Scatterplot with a single gradient coloring */

define statgraph gradientscatter;

  begingraph;

   layout overlay;        

   scatterplot x = X1 y = Y1 / markercolorgradient = Z 

   name = "scattergrad" colormodel=ThreeColorRamp;

   scatterplot x = X2 y = Y2 / markercolorgradient = Z 

   name = "scattergrad" colormodel=ThreeColorAltRamp;

   endlayout;

  endgraph;

end;

run;

/* Draw Scatterplot */

ods html style = styles.gradient;

proc sgrender data = &indata. template = gradientscatter; run;

[kelloggs]

Thanks for the quick reply!

Code looks good, but unfortunately I get the following error:

Looks like the color arguments are not accepted, any idea what the issue could be?

I also tried the following, which does run without an error, and the plot gets generated,but without any kind of color gradient:

proc template; 

define style styles.gradient;

parent = styles.default;

class ThreeColorRamp /

  endcolor=CXD3D3D3

  startcolor=CXFFDAB9

  neutralcolor=CXF0E68C

;

class ThreeColorAltRamp /

  endcolor=CXD3D3D3

  startcolor=CXFFDAB9

  neutralcolor=CXF0E68C

;

class graphbackground / color=white; end

; 

define statgraph gradientscatter;

begingraph;

entrytitle "&title.";

  layout overlay;
   scatterplot x = volat_below y = perf_below/ markercolorgradient = Z 

   name = "scattergrad"

   colormodel = ThreeColorRamp;

   scatterplot x = volat_above y = perf_above / markercolorgradient = Z 

   name = "scattergrad"

   colormodel = ThreeColorAltRamp;

  endlayout;

endgraph;

end;

run;

ods html style = styles.gradient;

proc sgrender data = &indata. template = gradientscatter;

run;

A couple of things I forgot to mention in the first post:

- I'm on SAS 9.3.

- The final plot should have 5 different groups. The sample I provided has only 2 groups for simplicity's sake.

  I'm mentioning this because I noticed that there seems to be only a 'ThreeColorRamp' and a 'ThreeColorAltRamp' , which may imply that only 2 different gradients can be used?

Regards

[kelloggs]

I just found the solution - the key is using "rangeattrmap":

template; 

define style styles.gradient;

parent = styles.default;

define statgraph gradientscatter;

begingraph;

  entrytitle "&title.";

  rangeattrmap name="density_below" ;

   range min - 5      / rangealtcolor=yellow;

   range 5  < - 20  / rangealtcolor=orange;

   range 20  < - max    /  rangealtcolor=red;

  endrangeattrmap ;

  rangeattrvar attrvar=rangevar_below var=n_below attrmap="density_below" ;

  rangeattrmap name="density_above" ;

   range 0 - 2      / rangealtcolor=skyblue;

   range 2  < - 4  / rangealtcolor=royalblue;

   range 4  < - max    / rangealtcolor=black;

  endrangeattrmap ;

  rangeattrvar attrvar=rangevar_above var=n_above attrmap="density_above" ;

  layout overlay;

   scatterplot x=x_below y=y_below/ markercolorgradient=rangevar_below;

   scatterplot x=x_above y=y_above/ markercolorgradient=rangevar_above;

  endlayout;

endgraph;

end;

run;

ods html style = styles.gradient;

proc sgrender data = &indata. template = gradientscatter; run;

Thanks for the input.

Regards