My understanding of the problem was that you wanted lines drawn in, say, th=
e x-z plane at a constant value oy y, rather than in the x-y plane at a con=
stant value of z.=0A=0AI've only ever done this with data points where the =
y-values are at the value I want to select (didn't look too pretty either f=
rom what I remember).=0A=0AIf it is a function is there some way of writing=
the function for a constant value of y and plotting a line? =0A=0AMike Lib=
by wrote:=0A=0A> I take slices of a 3d surface in splot by setting the rang=
e on one =0A> dimension to a minute amount.=0A=0AWhy re-invent contouring? =
gnuplot already has "set contour".=0A=0A> But the plot that appears is not=
a line but scattered dots. That is=0A> because all that appears is the pla=
ne's intercept with the 9x9 mesh.=0A=0AIt's your choice whether the mesh is=
9x9 or something else. gnuplot =0Adoes have a way to change the sampling =
rates of functions, after all. =0ASee "help samples".=0A=0A=0A=0A=0A=0A=0A=
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