I am trying to plot some data and I noticed that the y-axis tick values were all the same. I tried to add more precision using y format, but it did not work. I am unsure what I may have done wrong.
I initially thought that the plots were reflective of the data, but I discovered that the values were all the same. What was initially confusing was that the y-axis just shows the same repeating value on the major tics.
There is another similar question on StackOverflow (Repeating y-axis tick labels), but the solutions there did not work for me, and I would like to understand why gnuplot does this (which is also not explained in the other question).
%> gnuplot -V
gnuplot 4.4 patchlevel 3
set term png font 'Liberation Sans,10' size 800,200
set output "data/plotid09-" . timestamp . ".png"
set style line 1 lt 1 lw 1 lc rgb "purple" pt -1
set xlabel "Time" font 'Liberation Sans,10'
set xdata time
set timefmt "%Y-%m-%d %H:%M:%S"
set xtics font 'Liberation Sans,10'
set ytics font 'Liberation Sans,10'
set format y "%8.4f"
set ylabel "Kelvin"
plot "data.txt" using 1:6 ls 1 smooth bezier with lines title "Temperature"