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(* This is a graph for Figure 2 of the USENIX jgraph abstract. It shows
how to extract points from a data file with awk, and how to use awk
to plot a function to match the data (the function that is plot here
is (n/k)log(n), where k is expermentally chosen to be 35000.
There are two graphs plotted -- the first is the actual jgraph. The
second is a text string showing the input for the graph. Print it
out -- you'll see what I mean.
*)
newgraph
xaxis size 2.5
hash_labels font Helvetica
label : Number of indexed Records (N)
yaxis size 2.1
label : Running time (seconds)
hash_labels font Helvetica
newcurve
marktype cross
label : Data
pts shell : awk '{print $5, $8}' data.txt
newcurve
marktype none linetype solid
label : N log N / 35000
pts shell : awk \
' $5 != 0 { \
print $5, $5 * log($5) / 35000}' \
data.txt
copygraph
x_translate -3.1
border
xaxis nodraw min 0 max 1 size 2.3
yaxis nodraw min 0 max 1
newstring hjl vjc x .03 y .5 font Courier fontsize 6 :
xaxis size 2.5 \
hash_labels font Helvetica\
label : Number of indexed Records (N)\
yaxis size 2.1 \
label : Running time (seconds)\
hash_labels font Helvetica\
\
newcurve \
marktype cross\
label : Data\
pts shell : awk '{print $5, $8}' data.txt\
\
newcurve\
marktype none linetype solid\
label : N log N / 35000\
pts shell : awk \\
' $5 != 0 { \\
print $5, $5 * log($5) / 35000}' \\
data.txt\
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