File: watchmouse.dem

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gnuplot 6.0.2%2Bdfsg1-2
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# Illustrate watchpoint mouse tracking
# 2021 Weather data for Seattle Sand Point 
#
if (!strstrt(GPVAL_COMPILE_OPTIONS, "+WATCHPOINTS")) {
    print "This copy of gnuplot does not support watchpoints"
    exit  # return to caller
}
#
# Watchpoints only work for style "with lines" and "with linespoints".
# First show the easy way: each plot contains a watched line
#

set title "Seattle (USW00094290) weather data for 2021"

set xdata time
set timefmt "%Y-%m-%d"
set datafile separator comma
set datafile columnheaders

set style data lines
set style textbox opaque

set ylabel "Temperature"
set tics nomirror
set xtics format "%b %d"
set key reverse Left

set yrange [0:*]
set ytics 10, 10, 100
set ytics format "%.3h°F"
set offset 0, 0, 5, 0

set y2range [0:3.5]
set y2tics  0, 1, 2
set my2tics 10
set y2tics format "%.2g in"
set y2label "Precipitation" offset 0, -4

plot 'weather.csv' using 3:10 title "max temp" watch mouse, \
     'weather.csv' using 3:11 title "min temp" watch mouse, \
     '' using 3:6 axes x1y2 with lines lc "slategrey" title "precipitation" watch mouse

pause -1 '<cr> to continue'

#
# Now we hide the actual lines being watched by setting them to "lt nodraw"
# and use the plot styles we actually want the user to see.
# In this case it is yerrorbars to show the temperature range
# and filledcurves to show periods of rainfall.


set errorbars 0.5
set pointintervalbox 0.4

plot keyentry with yerrorbars pt 6 ps 0.4 title "min/avg/max temp", \
     'weather.csv' using 3:(($10+$11)/2):10:11 with yerrorbars pt 6 ps 0.4 notitle, \
     'weather.csv' using 3:10 lt nodraw notitle watch mouse, \
     'weather.csv' using 3:11 lt nodraw notitle watch mouse, \
     '' using 3:6 axes x1y2 with filledcurve x1 fc "slategrey" title "precipitation", \
     '' using 3:6 axes x1y2 lt nodraw notitle watch mouse

pause -1 '<cr> to continue'

unset datafile
reset