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Re^2: Searching in an array of arrays

by perl_seeker (Scribe)
on Nov 04, 2004 at 08:52 UTC ( #405118=note: print w/replies, xml ) Need Help??


in reply to Re: Searching in an array of arrays
in thread Searching in an array of arrays

Hello zejames!
Thanks a lot for your reply. I do not understand your code fully, please bear with me. What
are the variables last_range and first_day used for, and what should their initial values be?

Also for this line,
my $range = $day->[1] - ($day->[1] % 5);
I get this error:
Operation `%': no method found,left argument in overloaded package XML +::XPath::Literal,right argument has no overloaded magic at C:\..\xmlr +ecord_parse.pl line 604.
Using sprintf removes the error, but I'm not sure whether this is correct(i.e. the control string "%f"):
my $range = sprintf("%f","$day->[1]") - (sprintf("% f","$day->[1]") % 5);
My array of arrays @data looks like this:
[ 1-1-2004 15.0 ], [ 2-1-2004 15.5 ], [ 3-1-2004 16.5 ], [ 4-1-2004 17.0 ], [ 5-1-2004 17.5 ], [ 6-1-2004 18.0 ], [ 7-1-2004 18.5 ], [ 8-1-2004 19.0 ], [ 9-1-2004 19.5 ], [ 10-1-2004 25.0 ], [ 11-1-2004 26.5 ], [ 12-1-2004 27.5 ], [ 13-1-2004 28.0 ], [ 14-1-2004 29.5 ], [ 15-1-2004 28.0 ], [ 16-1-2004 28.8 ],
So the resulting array of arrays I need to build should look like this:
1-1-2004 5-1-2004 mild 10-1-2004 14-1-2004 verywarm
The values of $range (printing inside the loop)I'm getting are:
15 15.5 15.5 15 15.5 15 15.5 15 15.5 25 25.5 25.5 25 25.5 25 25.8
This statements does not print anything:
print "$first_day $day->[0] ".$ranges{$range}."\n";
Please help, really need it!

Thanks,
perl_seeker:)

Replies are listed 'Best First'.
Re^3: Searching in an array of arrays
by zejames (Hermit) on Nov 04, 2004 at 09:54 UTC
    I don't understand your first problem. Testing my code here with the @data defined as :
    @data = ( [ '1-1-2004', 15.0 ], [ '2-1-2004', 15.5 ], [ '3-1-2004', 16.5 ], [ '4-1-2004', 17.0 ], [ '5-1-2004', 17.5 ], [ '6-1-2004', 18.0 ], [ '7-1-2004', 18.5 ], [ '8-1-2004', 19.0 ], [ '9-1-2004', 19.5 ], ... [ '16-1-2004', 28.8 ]);
    does work here. Could you provide code ? Your problem seems to be XML related.

    As for the range, you're right, there is problem, that is corrected in the new version, by converting temperature to an integer :
    $day->[1] = int $day->[1];

    $last_range is used to remember the current range we are in. If that range remains unchanged 5 times, we print the range information.

    $first_day is used to remember the first day we saw the temperature of the current range;

    HTH

    --
    zejames
      Hi,this is (part of)the XML file I am parsing:
      - <AnnualWeatherRecord> - <DailyWeatherRecord> <date>1-1-2004</date> - <temperature> <maxdrybulb unit="degrees-centigrade" number="15.0" /> <mindrybulb unit="degrees-centigrade" number="15.0" /> <maxwetbulb unit="degrees-centigrade" number="33.53" /> <minwetbulb unit="degrees-centigrade" number="30.53" /> </temperature> <totalrainfall unit="mm" number="0.5" /> </DailyWeatherRecord> - <DailyWeatherRecord> <date>2-1-2004</date> - <temperature> <maxdrybulb unit="degrees-centigrade" number="15.5" /> <mindrybulb unit="degrees-centigrade" number="15.5" /> <maxwetbulb unit="degrees-centigrade" number="23.14" /> <minwetbulb unit="degrees-centigrade" number="20.14" /> </temperature> <totalrainfall unit="mm" number="0" /> </DailyWeatherRecord> - <DailyWeatherRecord> <date>3-1-2004</date> - <temperature> <maxdrybulb unit="degrees-centigrade" number="16.5" /> <mindrybulb unit="degrees-centigrade" number="16.5" /> <maxwetbulb unit="degrees-centigrade" number="33.53" /> <minwetbulb unit="degrees-centigrade" number="30.53" /> </temperature> <totalrainfall unit="mm" number="0.5" /> </DailyWeatherRecord> - <DailyWeatherRecord> <date>15-1-2004</date> - <temperature> <maxdrybulb unit="degrees-centigrade" number="28.0" /> <mindrybulb unit="degrees-centigrade" number="28.0" /> <maxwetbulb unit="degrees-centigrade" number="33.53" /> <minwetbulb unit="degrees-centigrade" number="30.53" /> </temperature> <totalrainfall unit="mm" number="0.5" /> </DailyWeatherRecord> - <DailyWeatherRecord> <date>16-1-2004</date> - <temperature> <maxdrybulb unit="degrees-centigrade" number="28.8" /> <mindrybulb unit="degrees-centigrade" number="28.8" /> <maxwetbulb unit="degrees-centigrade" number="33.53" /> <minwetbulb unit="degrees-centigrade" number="30.53" /> </temperature> <totalrainfall unit="mm" number="0" /> </DailyWeatherRecord> - <DailyWeatherRecord> <date>1-2-2004</date> - <temperature> <maxdrybulb unit="degrees-centigrade" number="44.25" /> <mindrybulb unit="degrees-centigrade" number="39.25" /> <maxwetbulb unit="degrees-centigrade" number="33.53" /> <minwetbulb unit="degrees-centigrade" number="30.53" /> </temperature> <totalrainfall unit="mm" number="0.5" /> </DailyWeatherRecord> - <DailyWeatherRecord> <date>2-2-2004</date> - <temperature> <maxdrybulb unit="degrees-centigrade" number="50.25" /> <mindrybulb unit="degrees-centigrade" number="49.25" /> <maxwetbulb unit="degrees-centigrade" number="23.14" /> <minwetbulb unit="degrees-centigrade" number="20.14" /> </temperature> <totalrainfall unit="mm" number="0" /> </DailyWeatherRecord> - <MonthlyWeatherRecord> <date>1-2004</date> - <temperature> <maxdrybulb unit="degrees-centigrade" number="33.95" /> <mindrybulb unit="degrees-centigrade" number="23.20" /> <avgdrybulb unit="degrees-centigrade" number="33.95" /> </temperature> <totalrainfall unit="mm" number="0.5" /> </MonthlyWeatherRecord> - <MonthlyWeatherRecord> <date>2-2004</date> - <temperature> <maxdrybulb unit="degrees-centigrade" number="50.25" /> <mindrybulb unit="degrees-centigrade" number="39.25" /> <avgdrybulb unit="degrees-centigrade" number="44.25" /> </temperature> <totalrainfall unit="mm" number="0.5" /> </MonthlyWeatherRecord> </AnnualWeatherRecord>
      And this is the code I'm using to parse it and build @data
      Subroutine
      sub MonthlyMaxTempSpellMessage{ my $month = shift; #print "\n$month"; $month = "-$month-"; #print "\n$month"; my $xp = XML::XPath->new(filename =>'weather_records.xml'); my @data=(); my $nodes = $xp->findnodes("//DailyWeatherRecord [contains(date,'$month')]"); foreach my $node($nodes->get_nodelist){ push @data, [$xp->findvalue(".//date",$node),$xp- >findvalue(".//maxdrybulb /\@number",$node)]; } for my $aref ( @data ) { print "\t [ @$aref ],\n"; }
      Main
      my $monthmts=1; MonthlyMaxTempSpellMessage($monthmts);
      Anything wrong here? What do I need to change in your code to build the required array of arrays?
      Thanks
      perl_seeker:)

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