Can anyone see where I might be going astray?
I usually work better when I have code in front of me to
poke holes at.... so I'll provide some. This is taken
straight from the CPAN download's examples for DBD::Chart
here is some sample code for a pie chart:
#!/usr/bin/perl -w
use DBI;
use DBD::Chart;
open(OUTF, ">pietest.html");
print OUTF "<html><body>
<img src=simppie.png>
<img src=updpie.png>
<img src=delpie.png>
</body></html>\n";
close OUTF;
$dbh = DBI->connect('dbi:Chart:');
#
# simple piechart
#
$dbh->do('CREATE TABLE pie (region CHAR(20), sales FLOAT)');
$sth = $dbh->prepare('INSERT INTO pie VALUES( ?, ?)');
$sth->execute('East', 2756.34);
$sth->execute('Southeast', 3456.78);
$sth->execute('Midwest', 1234.56);
$sth->execute('Southwest', 4569.78);
$sth->execute('Northwest', 33456.78);
$rsth = $dbh->prepare(
"SELECT PIECHART FROM pie
WHERE WIDTH=400 AND HEIGHT=400 AND
TITLE = \'Sales By Region\' AND
COLOR=(red, green, blue, lyellow, lpurple) AND
SIGNATURE=\'Copyright(C) 2001, GOWI Systems, Inc.\'
AND BACKGROUND=lgray");
$rsth->execute;
$rsth->bind_col(1, \$buf);
$rsth->fetch;
open(OUTF, '>simppie.png');
binmode OUTF;
print OUTF $buf;
close(OUTF);
print "simppie.png OK\n";
$updsth = $dbh->prepare('UPDATE pie SET sales = ? WHERE region = \'Nor
+thwest\' ');
$updsth->bind_param(1, 12999.45);
$updsth->execute;
$rsth->execute;
$rsth->bind_col(1, \$buf);
$rsth->fetch;
open(OUTF, '>updpie.png');
binmode OUTF;
print OUTF $buf;
close(OUTF);
print "updpie.png OK\n";
$delsth = $dbh->prepare('delete from pie where region = ? ');
$delsth->bind_param(1, 'Northwest');
$delsth->execute;
$rsth->execute;
$rsth->bind_col(1, \$buf);
$rsth->fetch;
open(OUTF, '>delpie.png');
binmode OUTF;
print OUTF $buf;
close(OUTF);
print "delpie.png OK\n";
I ran the code and did an "ls" in my CWD and lo
and behold I found:
[pberghol@cowdawg pietest]$ ls
delpie.png pietest.html pietest.pl simppie.png updpie.png
I bet if I open pietest.html I should see a pretty
chart. I tried it and I did.
If you look here you'll
see what I mean.
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