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 (but this is ugly).
Syntax:
set ylabel {"<label>"} {<xoff>}{,<yoff>}
show ylabel
With no parameters, the label is cleared. Specifying constants <xoff> or <yoff> as optional offsets for the label will move the label <xoff> or <yoff> character screen coordinates. For example,
set ylabel -1
will change only the x offset of the ylabel, moving the label roughly one character width left of its default position. This is especially useful with the LaTeX driver.
(The LaTeX, EEPIC, and Imagen drivers allow \ \ in a string to specify a newline.)