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<html><h1>distrib</h1><img src="distrib.gif"><p>
<a href="gall.using.html">How to download and try this example</a><br>
<pre><b>Usage: pl -gif distrib.htm
or for postscript output: pl -ps distrib.htm | lp
This is a more elaborate example that involves variables, a loop,
automatically calculated distributions for the histograms, etc.
<hr></b>
// <b> set landscape mode and do page title using <a href="../doc/page.html">proc page</a></b>
#proc page
landscape: yes
pagesize: 11 8.5
#if @DEVICE in gif,png
scale: 0.5
#endif
title: Distribution of Scores Over Time
Protocol 7 vs. Protocol B
06-30-99
// <b> read file <a href="vf.dat">vf.dat</a> using <a href="../doc/getdata.html">proc getdata</a></b>
#proc getdata
file: vf.dat
// <b> set some variables.. </b>
// I will be our loop counter..
#set I = 1
// make a list of the data fields to use for each left member of pair ..
// (rt member will be +1)
#set FIELDLIST = 7,9,11,13
// make a list of X left locations for each pair in inches..
#set XPOSLIST = 1,3.5,6,8.5
// make a list of labels for each pair
#set LABELLIST = "Baseline,1_yr_visit,2_yr,3_yr"
// <b> loop, once for each pair.. </b>
#loop
// get parameters from lists..
#set FLD = $nmember(@I,@FIELDLIST)
#if $strlen(@FLD) < 1
#break
#endif
#set XPOS = $nmember(@I,@XPOSLIST)
#set LABEL = $nmember(@I,@LABELLIST)
#set LABEL = $change( "_", " ", @LABEL )
//////////////////////////
// first do left of pair..
//////////////////////////
// <b> set up plotting area for histogram (left member of pair) using <a href="../doc/areadef.html">proc areadef</a></b>
#proc areadef
box: 1 2.5
location: @XPOS 4
xrange: 0 40
yrange: 0 100
#saveas A
// <b> if the leftmost pair, do a Y axis using <a href="../doc/axis.html">proc yaxis</a></b>
#if @I = 1
#proc yaxis
stubs: inc 10
label: Score
labeldistance: 0.7
stubslide: -2.5(s)
ticlen: 0 0
#endif
// <b> if the rightmost pair, do a Y axis using <a href="../doc/axis.html">proc yaxis</a></b>
#if @I = 4
#proc yaxis
location: 10.2
label: Score
labeldistance: -0.7
stubs: inc 10
stubdetails: adjust=0.5,0
stubslide: -2.5(s)
ticlen: 0 0
#endif
// <b> render label above pair using <a href="../doc/annotate.html">proc annotate</a></b>
#proc annotate
location: max-0.2 max+0.2
textdetails: align=C
text: @LABEL
// <b> compute distribution for histogram using <a href="../doc/tabulate.html">proc tabulate</a></b>
#proc tabulate
axis1: y
datafield1: @FLD
rangespec1: 0 5 95
percents: yes
select: @@4 = B
showrangelowonly: yes
#saveas: T
// <b> we cannot do a histogram if N is too low.. find N using <a href="../doc/transform.html">proc processdata</a></b>
// (the variable TOTALS will be set)..
#proc processdata
action: total
fields: 2
#endproc
// only do the histogram if we have > 10 cases..
#if @TOTALS > 10
// <b> render histogram using <a href="../doc/bars.html">proc bars</a></b>
#proc bars
horizontalbars: yes
locfield: 1
lenfield: 3
barwidth: 0.08
#saveas B
#endif
// <b> now set up plotting area for rangebars using <a href="../doc/areadef.html">proc areadef</a></b>
#proc areadef
box: 1 2
location: @XPOS 1
xrange: 0 1
yrange: 0 100
#saveas A2
// <b> if leftmost pair do a Y axis using <a href="../doc/axis.html">proc yaxis</a></b>
#if @I = 1
#proc yaxis
stubs: inc 10
label: Score
labeldistance: 0.7
#endif
// <b> if rightmost pair do a Y axis using <a href="../doc/axis.html">proc yaxis</a></b>
#if @I = 4
#proc yaxis
location: 10.2
label: Score
labeldistance: -0.7
stubs: inc 10
stubdetails: adjust=0.5,0
ticlen: -0.1
#endif
// <b> get back to original set of data (<a href="../doc/originaldata.html">proc originaldata</a>)</b>
#proc originaldata
// <b> render rangebar using <a href="../doc/rangebar.html">proc rangebar</a></b>
#proc rangebar
select: @@4 = B
datafield: @FLD
barloc: 0.25
mediansym: shape=circle style=filled fillcolor=0.3
nlocation: -10(s)
color: 0.9
#saveas R
////////////////////////////
// now do right of pair..
// (repeat of procedure above)
////////////////////////////
#set XPOS = $arith(@XPOS+1.0)
// do histogram..
#proc areadef
#clone A
location: @XPOS 4
#proc tabulate
#clone: T
select: @@4 = 7
// see if total is high enough to display histogram..
#proc processdata
action: total
fields: 2
#endproc
// only do the histogram if we have > 10 cases..
#if @TOTALS > 10
#proc bars
#clone B
#endif
// do rangebar..
#proc areadef
#clone: A2
location: @XPOS 1
// get back to data set originally read..
#proc originaldata
#proc rangebar
#clone R
select: @@4 = 7
barloc: 0.15
datafield: @FLD
#set I = $arith(@I+1)
#endloop
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