plot "datafile" with <error-display>Options for <error-display> are errorbars, xerrorbars, and yerrorbars.
The errors themselves are taken from the data file. For our purposes, let's put the x- and y-data in the first two columns, in which case the error information is assumed to be in one of the following formats:
x y dy (yerrorbars) x y ylow yhigh (yerrorbars) x y dx (xerrorbars) x y xlow xhigh (xerrorbars) x y dx dy (errorbars) x y xlow xhigh ylow yhigh (errorbars)The connection between the chosen option and the number of columns is always uniquely defined.
EXAMPLE: plot 'data3' every 20 with errorbars