1. Horizontal text flushed left at the top left of the plot. Terminals that cannot rotate text will probably use this method.
2. Vertical text centered vertically at the left of the plot. Terminals that can rotate text will probably use this method.
3. Horizontal text centered vertically at the left of the plot. The Latex and EEPIC drivers use this method. The user must insert line breaks using \ \ to prevent the ylabel from overwriting the plot. To produce a vertical row of characters, add \ \ between every printing character.
Syntax:
set ylabel set ylabel "label" show ylabel
The first clears the y-axis label (default). The second form sets the y-axis label to ``label'' (without the quotes).
The Latex, EEPIC, and Imagen drivers allow \ \ in a string to specify a newline.