topic Re: Gchart - Axis: How to generate Gchart by Descending Order base on a statistical variable, but it should meet the flexible and automatical stepping method like it does by default Ascending way? in Graphics Programming

Gchart - Axis: How to generate Gchart by Descending Order base on a statistical variable, but it should meet the flexible and automatical stepping method like it does by default Ascending way?

tanyuanbin — Tue, 19 Mar 2013 04:59:36 GMT

Dear All,

When Gchart produce picture by default ascending order, the output is nice as below:

when I changed the order by desending way with ORDER = definition, for example, ORDER=(2700 to 2580 by -4 ) it works well as such:

However, if we changed the value of step from 4 to 3, as here ORDER=(2700 to 2580 by -3 ), the output is changed as such:

in another word, the Shape of output looks quite different from the original ascending way, so was the point view of statictical value, i.e. AMOUNT.

So, the question is how to generate Gchart by Descending Order, and the stepping of midpoint should be defined automatically and same like it does by default Ascending way? or how should I specify and define a flexible data set(as here for AXIS) to meet the descending displaying requirement, like it defines and diaplays by Ascending order.

or, does any one have knowledge or document about the internal definition details of default ascending processing?

It would be very much appreciated if anyone can help! Thank you in advance for your time!

Best Regards,

Yuanbin

====THE CODE and Data AS BELOW

data Sample2;
      set Interest.Sample2;
run;
proc datasets lib=work nolist;
       modify Sample2;
       Label Trans_Amount='Amount' Current_Price='Current Price' ;
quit;

ods listing;
filename grafout "C:\Temp\j_BS_2D.gif";

goptions reset=all
          device=gif
          gsfname=grafout
          gsfmode=replace;

GOPTIONS xpixels=400 ypixels=300;

GOPTIONS COLORS = (BLUE/*CX0F3E93 */, BLUE, CYAN, CXD2477C, Green, Red/*CX165627 */);

Legend1
FRAME
POSITION = (BOTTOM CENTER OUTSIDE);

Axis1
STYLE=1
WIDTH=1
/* ORDER=(2580 to 2700 by 4) */
ORDER=(2700 to 2580 by -3 )

LABEL=( "Current Price" )

;
Axis2
     STYLE=1
     WIDTH=1
     MINOR=
     (NUMBER=1
     )
;
TITLE;

TITLE1 h=2 "IF1304 Price Distribution Analysis" ;

FOOTNOTE;

PROC GCHART DATA=Sample2 gout=work.gseg;
     HBAR     Current_Price
/ SUMVAR=Trans_Amount
     CLIPREF
/*       DESCENDING   */

FRAME SUM /* NOSTATS */
TYPE=SUM

     LEGEND=LEGEND1
     COUTLINE=BLACK
     MAXIS=AXIS1
     RAXIS=AXIS2
     LREF=34
     CREF=BLUE
     AUTOREF
CTEXT=BLACK
CAXIS=BLACK
;

RUN; QUIT;

TITLE; FOOTNOTE;
GOPTIONS RESET=ALL;

Re: Gchart - Axis: How to generate Gchart by Descending Order base on a statistical variable, but it should meet the flexible and automatical stepping method like it does by default Ascending way?

tanyuanbin — Thu, 21 Mar 2013 05:25:23 GMT

Dear Experts:

If any advice or hlep, it's very much appreciated, Thanks!

Sincerely,

Yuanbin

Re: Gchart - Axis: How to generate Gchart by Descending Order base on a statistical variable, but it should meet the flexible and automatical stepping method like it does by default Ascending way?

GraphGuy — Thu, 21 Mar 2013 12:12:15 GMT

When you use a 'by' value in the bar chart's midpoint axis, you are not only controlling the order, but also controlling the grouping (binning) of data each bar is comprised of.

I typically pre-summarize my bar chart data before I run gchart, and I either have a character midpoint variable, or I use the 'discrete' option (so that no grouping (binning) is done on the bars).

Then, if I want to control the orders of the bars in a way that Gchart does not provide, I sort my summarized data set as desired, assign a numeric variable to the data order (such as 'bar_order=_n_'), and then use that variable (bar_order) as my midpoint variable. And I use a user-defined format so that the numeric variable (bar_order) will print in the graph as a text value that I want.

Re: Gchart - Axis: How to generate Gchart by Descending Order base on a statistical variable, but it should meet the flexible and automatical stepping method like it does by default Ascending way?

DanH_sas — Thu, 21 Mar 2013 13:41:42 GMT

Hey Yuanbin,

I believe what is happening here is that your ORDER option is excluding your data. Even when you use "by 4", you could be loosing data, unless the bins happen to fall in "by 4" increments. When you use "by 3", the exclusion pattern becomes different. In general, it is not good to use the ORDER option for categorical axes. You should use the MIDPOINTS option on the HBAR statement to set the bins, e.g. midpoints=(2700 to 2580 by -3).

Hope this helps!

Dan

Re: Gchart - Axis: How to generate Gchart by Descending Order base on a statistical variable, but it should meet the flexible and automatical stepping method like it does by default Ascending way?

tanyuanbin — Sun, 24 Mar 2013 02:17:49 GMT

Hi Robert and Dan,

I just came back and was looking for your advice, Robert's solution is a detailed one, I believed it can shoot the trouble in-deepth , while I applied for the advice from Dan first, it does work also! I thank you all so much for the great help!

Thank you all for your time again!

Sincerely,

Yuanbin