> I am drawing two plots in one diagram. The problem is the yrange
>is not the same for these two groups of data.So I need two different
>y axises(left and right).But I can't get it work.Can anyone tell me how to
>deal with it?
The second y axis is called "y2". It is disabled by default.
You must turn it on and then specify in the plot command to use it.
You may or may not want to explicitly give an axis range for it.
See 'help plot axes'
set y2tics # turn on y2 axis labels
# Use the default axes (x1 and y1) for the first plot
# second plot uses y2 axis but the same x axis
plot 'file1' using 1:2, 'file2' using 1:3 axes x1y2
Ethan A Merritt