GnuPlot - Points Linepoints Circles

Points

Point Size

Example will be: plot sin(x) with points, sin(x+1) with points pointsize 2, sin(x+2) with points pointsize 4

Point Size

Point Type

Example will be: plot x+1 with points pointtype 1, x+2 w p pt 2, x+3 w p pt 3, x+4 w p pt 4, x+5 w p pt 5

Point Type

If I want to define my own point type, we can use the commands as below:

Lines Point

Point Type

Example command will be: plot sin(x) with linespoint pointtype 6, sin(x+7) w lp pt 7, sin(x+8) w lp pt 8

If I want to have my own symbols, the example will be: 

plot sin(x) with linespoint pt "ß",sin(x+1) with linespoint pt "Y",sin(x+2) with linespoint pt "#"

Circles

For example, we take the following table

x	y	size
1	1	0.6
2	2	0.9
3	3	0.7
4	4	2
5	5	0.9

We overlap the plot with linespoint to understand the relative sizes of circles.  To make this work, the table should always have the third column mentioning the diameter of circles.  The command

gnuplot> set style fill transparent solid 0.2 noborder
gnuplot> plot 'num.dat' using 1:2:3 with circles, 'num.dat' using 1:2:xtic(1) with linespoint

Results in this graph.

Lets take another example, with the following command and the corresponding table.

gnuplot> set style fill transparent solid 0.2 noborder
gnuplot> plot 'num.dat' using 1:2:3 with circles, 'num.dat' using 1:2:xtic(1) with linespoint

PieChart

GnuPlot doesn't support PieChart.