ex2_unset_and_locate_key

# key means legend in gnuplot
# method 1: use "unset key" to erase a legend
#plot 'text1' u 1:2 w l
#unset key
#replot

# method 2:
#set key at graph 0.5, graph 0.9
#plot sin(x) notitle, 'text1' u 1:2 title "simple"

# how to locate key?
# Available choices are : left, right , top, bottom, outside, below.
# we can combine some of them
set key left top
plot sin(x) notitle, 'text1' u 1:2 title "simple"