wizsc has asked for the wisdom of the Perl Monks concerning the following question:

Hi Monks, I'm trying to plot a chart in perl from the excel sheet that I also create in the program. Below is the actual code. If I understood it correctly, the $A and $B etc under "values" in add_series function are the excel column number. I'm facing a problem where it would plot data only if I put $A in it. No other column(tried $B, $CJ). I'll appreciate help with these questions: 1. Why is nothing being plotted if I try any column other than $A? 2. I need to automate it to pick the last column of any sheet. I couldn't figure a syntax to do that. 3. How do I automate the worksheet name “sim_*” to as many sheets I have? 


#!/usr/intel/pkgs/perl/5.14.1/bin/perl 

use Spreadsheet::WriteExcel;


$num_files = @ARGV[0];
print "Help - Syntax: 
       ./process_xyz.pl <number_of_csv_files> <all_csv_files>\n";

print " The output file is: xyz_stat.xls \n";
my $workbook                = Spreadsheet::WriteExcel->new('xyz_stat.x
+ls') or die $!;
my $worksheet_chart         = $workbook->add_worksheet('chart');

my $chart                   = $workbook->add_chart(type => 'line', emb
+edded => 1);

for ($k = 1; $k <= $num_files; $k++) {
  $stat_file[$k] = @ARGV[$k];
  open (_file, "$stat_file[$k]") or die "cannot open $stat_file[$k]";
  $frm_num = 0;
  $frm_start = 2;
  $frm_end   = 3;
  $tmp_var = "sim_$k";
  $worksheet[$k]            = $workbook->add_worksheet($tmp_var);

  while ($line = <_file>) {
    @frame_stats = split(/,/,$line);

    my $col = 0;
    foreach $el(@frame_stats) {
        $worksheet[$k]->write($frm_num, $col, $el);
        $col ++;
    }

    $frm_num++;
  }

}
  $chart->add_series(
#      categories => '=test1!$A$2:$A$10',
      values     => '=sim_1!$B$2:$B$361',
#      values     => '=sim_1!$A$2:$A$361',
      name       => 'sim1',
  );

  $chart->add_series(
#      categories => '=test1!$A$2:$A$10',
      values     => '=sim_2!$CU$2:$CU$361',
      name       => 'sim2',
  );

$worksheet_chart->insert_chart('E2', $chart, 15, 10);

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Replies are listed 'Best First'.
Re: Plot a chart
by 1s44c (Scribe) on Jul 22, 2014 at 23:06 UTC

    You might want to format your post with some HTML markup as it's really hard to read.

[reply]
      Sorry about that. Hope it's better now.
[reply]
Re: Plot a chart
by poj (Abbot) on Jul 23, 2014 at 18:59 UTC
    Adapt this test script and see if it works for you 
    #!perl
use strict;
use Spreadsheet::WriteExcel;
my @data1 = map { int rand(10) }(0..34);
my @data2 = map { int rand(10) }(0..34);

my $workbook = Spreadsheet::WriteExcel->new('c:/temp/xyz_stat.xls') or
+ die $!;
my $sheet = $workbook->add_worksheet('sim_1');
$sheet->write_col('B2',\@data1);
$sheet = $workbook->add_worksheet('sim_2');
$sheet->write_col('CU2',\@data2);

my $worksheet_chart = $workbook->add_worksheet('chart');

my $chart = $workbook->add_chart(type => 'line', embedded => 1);
$chart->add_series( name=>'sim1', values=>'=sim_1!$B$2:$B$36');
$chart->add_series( name=>'sim2', values=>'=sim_2!$CU$2:$CU$36');
$worksheet_chart->insert_chart('E2', $chart, 15, 10);
$workbook->close;

    [download]
    poj
[reply]
[d/l]
      Thanks, poj. Your script works just fine. I wonder if there's a scope issue in my script. Something inside the for loop is not right IMO. Does anyone see it?
[reply]
        Try reading your csv files with Text:CSV_XS, adding use strict; use warnings and some print diagnostics. 
        #!perl
use strict;
use warnings;
use Spreadsheet::WriteExcel;
use Text::CSV_XS;

my $csv = Text::CSV_XS->new({ 
  binary => 1, sep_char => ',', eol => "\n"}); 
  
my $xlsfile = 'c:/temp/xyz_stat1.xls';
my $workbook = Spreadsheet::WriteExcel->new($xlsfile) 
   or die $!;

my $num_files = $ARGV[0] || 0;
for my $k (1..$num_files){
  my $csvfile = $ARGV[$k];
  print "Opening $csvfile .. ";
  open my $fh, '<', $csvfile or die "Cannot open $csvfile : $!"; 
  my $sheet = $workbook->add_worksheet('sim_'.$k);
  my $ar = $csv->getline_all($fh);
  $sheet->write_col(0,0,$ar);
  close $fh;
  print scalar (@$ar). " lines read into sheet sim_$k\n";
}
$workbook->close;
print "$xlsfile created\n";

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        poj
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