topic Use multiple "markercolorgradient" in one ODS plot ? in Graphics Programming

Use multiple "markercolorgradient" in one ODS plot ?

kelloggs — Thu, 12 Dec 2013 15:20:38 GMT

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")

- 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

Re: Use multiple "markercolorgradient" in one ODS plot ?

DanH_sas — Thu, 12 Dec 2013 15:49:02 GMT

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;

Re: Use multiple "markercolorgradient" in one ODS plot ?

kelloggs — Fri, 13 Dec 2013 10:01:11 GMT

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

Re: Use multiple "markercolorgradient" in one ODS plot ?

kelloggs — Fri, 13 Dec 2013 12:28:29 GMT

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