CentOS

Hi,
sorry for asking this question, but i'm new in Gnuplot and little confused.

I have a data file (plot_size_transferd.csv) in csv format and a plot file like:

###############################
set title 'Size transfered'
set xlabel 'Date'
set ylabel 'Transfered size (GB)'
set grid x2tics ytics
set datafile separator ";"
set xtics rotate by 90 right out nomirror

set term jpeg enhanced giant size 1024,768
set output 'size_transfered.jpg'

plot "plot_size_transferd.csv" title "CDGSHG" with line lt -1 lw 1 linecolor rgb "blue"
###############################

if i run my gnuplot file i get a graph like you can see in file 'wrong_graph.PNG', but i expect a graph like in 'file expected_graph.PNG', which i created in excel withou any modifications.

can you please explain me, whats wrong whith my plot file ??

Thanks in advance.
FK

The question "How to use Gnuplot?" is not specific to CentOS.
Out of curiosity I did browse gnuplot's own website and got these:

Code: Select all

set ylabel 'Size transfered'
set xlabel 'Date'
set title 'Transfered size (GB)'
set grid x2tics ytics
set datafile separator ";"
set xtics rotate by 90 right out nomirror

set key autotitle columnhead
unset key

set timefmt "%Y.%m.%d-%H:%M:%S"
set xdata time
set format x "%Y.%m.%d"
set term jpeg enhanced giant size 1024,768
set output 'size_transfered.jpg'

plot "plot_size_transferd.csv" using 1:2 title "CDGSHG" with line lt -1 lw 1 linecolor rgb "blue"

Gnuplot was not happy about the header line (columnhead), so found a way to ignore.
The 'timefmt' tells how to read time from file.
The 'xdata time' tells that x-values are time.
The 'plot' had to have 'using 1:2' explicitly.

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