SAS plot SGPLOT - plot

Question

I have 3 columns A, B, C. I tried to do a overlay plot, which shows one line of B and one line of C (A is the x axis). However, when I use the code below, the output looks super ugly. What is a better way to do it? Thank you.
proc plot data=djia;
plot A*B='*'
A*C='o' / overlay box;
title 'Plot of Highs and Lows';
title2 'for the Dow Jones Industrial Average';
run;
http://support.sas.com/documentation/cdl/en/proc/61895/HTML/default/viewer.htm#a002473570.htm

Answer 1

In SGPLOT the plotting statements, by defaults, plot onto the same graphing 'canvas', and thus overlay. The first statements are drawn first, so you can produce any desired 'z-effect' for the overlaying.
Example plotting djia data.
proc sgplot data=djia;
band x=year lower=low upper=high / fillatrrs=(color=vlig);
series x=year y=high / markers;
series x=year y=low / markers;
run;
The SAS knowledge base article http://support.sas.com/kb/51/821.html shows how to band (fill) the region between low and high.
Data for example
* from http://support.sas.com/documentation/cdl/en/proc/61895/HTML/default/viewer.htm#a000075748.htm#a000075747 ;
data djia;
input Year #7 HighDate date7. High #24 LowDate date7. Low;
format highdate lowdate date7.;
datalines;
1954 31DEC54 404.39 11JAN54 279.87
1955 30DEC55 488.40 17JAN55 388.20
1956 06APR56 521.05 23JAN56 462.35
1957 12JUL57 520.77 22OCT57 419.79
1958 31DEC58 583.65 25FEB58 436.89
1959 31DEC59 679.36 09FEB59 574.46
1960 05JAN60 685.47 25OCT60 568.05
1961 13DEC61 734.91 03JAN61 610.25
1962 03JAN62 726.01 26JUN62 535.76
1963 18DEC63 767.21 02JAN63 646.79
1964 18NOV64 891.71 02JAN64 768.08
1965 31DEC65 969.26 28JUN65 840.59
1966 09FEB66 995.15 07OCT66 744.32
1967 25SEP67 943.08 03JAN67 786.41
1968 03DEC68 985.21 21MAR68 825.13
1969 14MAY69 968.85 17DEC69 769.93
1970 29DEC70 842.00 06MAY70 631.16
1971 28APR71 950.82 23NOV71 797.97
1972 11DEC72 1036.27 26JAN72 889.15
1973 11JAN73 1051.70 05DEC73 788.31
1974 13MAR74 891.66 06DEC74 577.60
1975 15JUL75 881.81 02JAN75 632.04
1976 21SEP76 1014.79 02JAN76 858.71
1977 03JAN77 999.75 02NOV77 800.85
1978 08SEP78 907.74 28FEB78 742.12
1979 05OCT79 897.61 07NOV79 796.67
1980 20NOV80 1000.17 21APR80 759.13
1981 27APR81 1024.05 25SEP81 824.01
1982 27DEC82 1070.55 12AUG82 776.92
1983 29NOV83 1287.20 03JAN83 1027.04
1984 06JAN84 1286.64 24JUL84 1086.57
1985 16DEC85 1553.10 04JAN85 1184.96
1986 02DEC86 1955.57 22JAN86 1502.29
1987 25AUG87 2722.42 19OCT87 1738.74
1988 21OCT88 2183.50 20JAN88 1879.14
1989 09OCT89 2791.41 03JAN89 2144.64
1990 16JUL90 2999.75 11OCT90 2365.10
1991 31DEC91 3168.83 09JAN91 2470.30
1992 01JUN92 3413.21 09OCT92 3136.58
1993 29DEC93 3794.33 20JAN93 3241.95
1994 31JAN94 3978.36 04APR94 3593.35
;

Answer 2

In general in SGxxx procs you just add more statements to get more things to appear on the graph. For example you might want to show regression lines for AGE * WEIGHT and AGE * HEIGHT on the same graph.
proc sort data=sashelp.class out=class ;
by age;
run;
proc sgplot data=class;
reg x=age y=weight / legendlabel='Weight';
reg x=age y=height / legendlabel='Height' y2axis;
run;