Lab::Measurement - Log, describe and plot data on the fly
use Lab::Measurement; my $measurement=new Lab::Measurement( sample => $sample, title => $title, filename_base => 'qpc_pinch_off', description => $comment, live_plot => 'QPC current', columns => [ { 'unit' => 'V', 'label' => 'Gate voltage', 'description' => 'Applied to gates via low path filter.', }, { 'unit' => 'V', 'label' => 'Amplifier output', 'description' => "Voltage output by current amplifier set to $amp.", } ], axes => [ { 'unit' => 'V', 'expression' => '$C0', 'label' => 'Gate voltage', 'min' => ($start_voltage < $end_voltage) ? $start_voltage : $end_voltage, 'max' => ($start_voltage < $end_voltage) ? $end_voltage : $start_voltage, 'description' => 'Applied to gates via low path filter.', }, { 'unit' => 'A', 'expression' => "abs(\$C1)*$amp", 'label' => 'QPC current', 'description' => 'Current through QPC', }, { 'unit' => '2e^2/h', 'expression' => "(\$A1/$v_sd)/$g0)", 'label' => "Total conductance", }, { 'unit' => '2e^2/h', 'expression' => "(1/(1/abs(\$C1)-1/$U_Kontakt)) * ($amp/($v_sd*$g0))", 'label' => "QPC conductance", 'min' => -0.1, 'max' => 5 }, ], plots => { 'QPC current' => { 'type' => 'line', 'xaxis' => 0, 'yaxis' => 1, 'grid' => 'xtics ytics', }, 'QPC conductance'=> { 'type' => 'line', 'xaxis' => 0, 'yaxis' => 3, 'grid' => 'ytics', } }, ); $measurement->start_block(); my $stepsign=$step/abs($step); for (my $volt=$start_voltage;$stepsign*$volt<=$stepsign*$end_voltage;$volt+=$step) { $knick->set_voltage($volt); usleep(500000); my $meas=$hp->read_voltage_dc(10,0.0001); $measurement->log_line($volt,$meas); } my $meta=$measurement->finish_measurement();
This module simplifies the task of running a measurement, writing the data to disk and keeping track of necessary meta information that usually later you don't find in your lab book anymore.
If your measurements don't come out nice, it's not because you were using the wrong software.
$measurement=new Lab::Measurement(%config);
where %config can contain
%config
sample => '', # see Meta title => '', # single line filename => '', filename_base => '', # for auto_naming description => '', # multi line columns => [], axes => [], plots => [], # See Meta live_plot => '', # Name of plot that is to be plotted live live_refresh => '', live_latest => '', writer_config => {}, # Configuration options for Lab::Data::Writer
$block_num=$measurement->start_block($label);
$measurement->log_line(@data);
$meta=$measurement->finish_measurement();
$now=$measurement->now_string();
magic log. deprecated.
Copyright 2004-2006 Daniel Schröer (L<http://www.danielschroeer.de>)
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
1 POD Error
The following errors were encountered while parsing the POD:
Non-ASCII character seen before =encoding in 'Schröer'. Assuming UTF-8
To install Lab::Measurement, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Lab::Measurement
CPAN shell
perl -MCPAN -e shell install Lab::Measurement
For more information on module installation, please visit the detailed CPAN module installation guide.