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Groups > comp.graphics.apps.gnuplot > #4474

Re: Filtering and summation of data

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On 19.05.2022 20:15, thomas.lehm...@googlemail.com wrote:
> Hi,
> 
> considering data in a table where value are categorized.
> I would like to be able a) to filter data for a plot by category
> and b) I would like to sum up all values with same category
> being able to display it in a plot with box.
> 
> Important: the solution should be platform independent;
> as an example "awk" or "sed" is not available on all platforms.
> Yes python would be possible but I really would prefer the
> pure Gnuplot solution if possible.
> 
> Kind Regards,
> Thomas
> 
> Appendix:
> 
> What I. have sofar:
> 
> <code>
> set terminal pngcairo size 1400,1000 enhanced font ",20"
> set output "DemoSum.png"
> 
> $DemoData << EOD
> Timestamp, Category, Value
> 2022-05-19 05:55:00, test1,  5
> 2022-05-19 09:16:00, test2, 15
> 2022-05-19 13:56:00, test3, 10
> 2022-05-20 05:15:00, test1, 20
> 2022-05-20 10:58:00, test2,  5
> 2022-05-20 17:20:00, test3, 25
> EOD
> 
> set datafile separator ","
> set key autotitle columnhead
> 
> # a very simple plot functionality
> set multiplot layout 2, 1 title "Timestamps And Sums"
> 
> # define line style(s)
> set style line 1 lc rgb 'grey30' ps 0 lt 1 lw 2
> set style line 2 lc rgb 'grey70' lt 1 lw 2
> set style fill solid 1.0 border rgb 'grey30'
> 
> set timefmt "%Y-%m-%d %H:%M:%S"
> set xdata time
> set grid
> 
> set title "Data based on date and time"
> plot $DemoData using 1:3 with linespoint linestyle 1
> 
> unset xdata
> set title "Data based on categories"
> plot $DemoData using 3:xtic(2) with boxes linestyle 1
> </code>

Do you mean the second graph like this?

<code>
set terminal pngcairo size 1400,1000 enhanced font ",20"
set output "DemoSum.png"

$DemoData << EOD
Timestamp, Category, Value
2022-05-19 05:55:00, test1,  5
2022-05-19 09:16:00, test2, 15
2022-05-19 13:56:00, test3, 10
2022-05-20 05:15:00, test1, 20
2022-05-20 10:58:00, test2,  5
2022-05-20 17:20:00, test3, 25
EOD

set datafile separator ","
set key autotitle columnhead

# a very simple plot functionality
set multiplot layout 2, 1 title "Timestamps And Sums"

# define line style(s)
set style line 1 lc rgb 'grey30' ps 0 lt 1 lw 2
set style line 2 lc rgb 'grey70' lt 1 lw 2
set style fill solid 1.0 border rgb 'grey30'

set timefmt "%Y-%m-%d %H:%M:%S"
set xdata time
set grid

set title "Data based on date and time"
plot $DemoData using 1:3 with linespoint linestyle 1

unset xdata
set title "Data based on categories"

stats $DemoData u(strcol(2) eq "test1" ? $3:1/0)
sum_test1 = STATS_sum
stats $DemoData u(strcol(2) eq "test2" ? $3:1/0)
sum_test2 = STATS_sum
stats $DemoData u(strcol(2) eq "test3" ? $3:1/0)
sum_test3 = STATS_sum

set xtics in ('test1' 1, 'test2' 2, 'test3' 3)

set boxwidth 1 absolute
set yrange [0:*]
set xrange [0:4]
plot '+' u (1):(sum_test1) w boxes, '+' u (2):(sum_test2) w boxes,  '+'
u (3):(sum_test3) w boxes
unset multiplot
set out
reset
</code>

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Filtering and summation of data "thomas.lehm...@googlemail.com" <thomas.lehmann.private@googlemail.com> - 2022-05-19 11:15 -0700
  Re: Filtering and summation of data Jörg Buchholz <bookwood4new@freenet.de> - 2022-05-23 07:22 +0200
  Re: Filtering and summation of data Jörg Buchholz <bookwood4new@freenet.de> - 2022-05-23 13:36 +0200

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