## Outline:

Range

Border

Zero axes

Key

Tics

Major tics

Minor tics

Nomirror and second tics

Other options for tics

Grid

Want only the plot?

Title, key title, and lable

Title

Key title

Label

Arrow

Resolution

3D Plot general

Scaling

Size ratio

Tics level

Log scale

Parameterizing

Parametric

Polar

Border

Zero axes

Key

Tics

Major tics

Minor tics

Nomirror and second tics

Other options for tics

Grid

Want only the plot?

Title, key title, and lable

Title

Key title

Label

Arrow

Resolution

3D Plot general

Scaling

Size ratio

Tics level

Log scale

Parameterizing

Parametric

Polar

Data plot

Basics

Vector

Bar graph

Line and point styles

Multiple columns data plot

Multiplot

For CSV files

For Fortran high precision data

Error bars

Candle chart

3D data plot

Other tips

Define a function

Plot with complex variables

Tertiary operator

Skip data values

Gnuplot as a calculator

Timestamp

Data fitting

Basics

Vector

Bar graph

Line and point styles

Multiple columns data plot

Multiplot

For CSV files

For Fortran high precision data

Error bars

Candle chart

3D data plot

Other tips

Define a function

Plot with complex variables

Tertiary operator

Skip data values

Gnuplot as a calculator

Timestamp

Data fitting

## Key

"Key" is the label of a data file (or a function) plotted. It appears in right-top in the display. In order to erase it, type simply
gnuplot> unset key

Compare this with the previous plot. You can see that the key has been removed.
You can also change the location of keys. You can select the following options with "set key" command:
gnuplot> set key left

gnuplot> set key center

gnuplot> set key right

gnuplot> set key top

gnuplot> set key bottom

gnuplot> set key outside

gnuplot> set key inside

gnuplot> set key above

gnuplot> set key below

You can also combine a few of them. For example,
gnuplot> set key center

gnuplot> set key right

gnuplot> set key top

gnuplot> set key bottom

gnuplot> set key outside

gnuplot> set key inside

gnuplot> set key above

gnuplot> set key below

gnuplot> set key left top outside

gnuplot> plot tan(x)

gnuplot> plot tan(x)

If you need to change the name of key, enter "title" command and the name will be replaced.

gnuplot> set key bottom

gnuplot> plot [0:5] log(x) title 'Log of x'

You will see "Log of x" instead of "log(x)" for the key.
Note that multiple commands for one function or data file does not need commas to separate commands.
When you plot multiple functions or data, you need to use commas for each plot.
gnuplot> plot [0:5] log(x) title 'Log of x'

If there are multiple keys to display, you may need a spacing between them because it may look crowded. The command, "set key spacing" can be used to solve this issue. The default spacing is 1. If you set like 0.5, the keys will be overlapped each other. Let's have an example to compare.

gnuplot> set key spacing 2

gnuplot> plot [-2:2] sinh(x),cosh(x)

gnuplot> plot [-2:2] sinh(x),cosh(x)

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