print "Watch some  cubic splines"
set samples 50
set xlabel "Angle (deg)"
set ylabel "Amplitude"
set key box
set title "Bragg reflection -- Peak only"
plot "big_peak.dat" title "Rate" with errorbars, \
                 "" smooth csplines t "Rate"
pause -1 "You would draw smaller bars? (-> return)"
set bars small
replot
set bars large
#
pause -1 "An approx-spline demo (-> return)"
set samples 300
set xlabel "Time (sec)"
set ylabel "Rate"
set title "Ag 108 decay data"
plot "silver.dat" t "experimental" w errorb, \
               ""  smooth csplines t "cubic smooth"
# error is column 3; weight larger errors less
# start with rel error = 1/($3/$2)
pause -1 "Now apply a smoothing spline, weighted by 1/rel error (-> return)"
S=1
plot "silver.dat" t "experimental" w errorb,\
               "" u 1:2:(S*$2/$3) smooth acsplines t "acspline Y/Z"
pause -1 "Make it smoother by changing the smoothing weights (-> return)"
plot "silver.dat" t "rate" w errorb,\
               "" u 1:2:($2/($3*1.e1)) sm acs t "acspline Y/(Z*1.e1)",\
               "" u 1:2:($2/($3*1.e3)) sm acs t "         Y/(Z*1.e3)",\
               "" u 1:2:($2/($3*1.e5)) sm acs t "         Y/(Z*1.e5)"
pause -1 "Accentuate the relative changes with a log-scale (-> return)"
set logscale y
set grid x y mx my
replot
pause -1 "Next - shaded area for error range (-> return)"
#
Shadecolor = "#80E0A080"
plot 'silver.dat' using 1:($2+$3):($2-$3) with filledcurve fc rgb Shadecolor \
     title "Shaded error region", \
     '' using 1:2 smooth mcspline lw 2 \
     title "Monotonic spline through data"
pause -1 "Now approximate the data with a bezier curve between the endpoints (-> return)"
#
unset logscale y
plot "silver.dat" t "experimental" w errorb,\
               "" smooth sbezier t "bezier"
pause -1 "You would rather use log-scales ? (-> return)"
set logscale y
plot "silver.dat" t "rate" w errorb, \
               "" smooth sbezier t "bezier"
#
pause -1 "Errorbar demo (-> return)"
set samples 100
unset logscale
unset grid
set xlabel "Resistance [Ohm]"
set ylabel "Power [W]"
set title "UM1-Cell Power"
n(x)=1.53**2*x/(5.67+x)**2
plot [0:50] "battery.dat" t "Power" with xyerrorbars, n(x) t "Theory" w lines
pause -1 "Would you like boxes? (-> return)"
plot [0:50] "battery.dat" t "Power" with boxxy, n(x) t "Theory" w lines
pause -1 "Only X-Bars? (-> return)"
plot [0:50] "battery.dat" u 1:2:3 t "Power" w xerr, n(x) t "Theory" w lines
pause -1 "Only Y-Bars? (-> return)"
plot [0:50] "battery.dat" u 1:2:4 t "Power" w yerr, n(x) t "Theory" w lines
pause -1 "Logscaled? (-> return)"
set logscale y
plot [0:50] "battery.dat" u 1:2:4 t "Power" w yerr, n(x) t "Theory" w lines
pause -1 "X as well? (-> return)"
set logscale xy
plot [1:50] "battery.dat" t "Power" w xyerr, n(x) t "Theory" w lines
pause -1 "If you like bars without tics (-> return)"
unset logscale
set bars small
plot [0:50] "battery.dat" t "Power" with xyerrorbars, n(x) t "Theory" w lines
pause -1 "X-Bars only (-> return)"
plot [0:50] "battery.dat" u 1:2:3 t "Power" w xerr, n(x) t "Theory" w lines
pause -1 "Y-Bars only (-> return)"
plot [0:50] "battery.dat" u 1:2:4 t "Power" w yerr, n(x) t "Theory" w lines
pause -1 "Hit return to continue"
reset
