xerrorbars

The xerrorbars style is only relevant to 2D data plots. xerrorbars is like points, except that a horizontal error bar is also drawn. At each point (x,y), a line is drawn from (xlow,y) to (xhigh,y) or from (x-xdelta,y) to (x+xdelta,y), depending on how many data columns are provided. The appearance of the tic mark at the ends of the bar is controlled by set errorbars. The basic style requires either 3 or 4 columns:

     3 columns:  x  y  xdelta
     4 columns:  x  y  xlow  xhigh

An additional input column (4th or 5th) may be used to provide variable color. This style does not permit variable point properties.