gnuplot-info

[Gnuplot-info] axis

[goon <hin...@ho...>]

hai...I have a question about axis while ploting a graph in gnuplot. Can I
change vertical axis from z axis to y axis. My current setting , vertical
axis is Z axis. Can user define the axis depend on their application or it
is fit as z is vertical.

Thank You.
goon
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Re: [Gnuplot-info] axis

[Lars H. <la...@ho...>]

> hai...I have a question about axis while ploting a graph
> in gnuplot. Can I change vertical axis from z axis to y
> axis. My current setting , vertical axis is Z axis. Can
> user define the axis depend on their application or it is
> fit as z is vertical.

Hello,
you can't change the order in which gnuplot prints the axes. 
It follows the mathematicla rule of usual 3-d-coordinates: 
the vector of the z-axis is a result of the vector product 
of x and y. 

You may change the way that gnuplot reads your data or your 
mathematical expressions. If you are plotting 
3D-Datapoints, you may use the keyword "using" to tell 
gnuplot, that you would like to have the y-coordinate in 
your dataset plotted over the z-axis of gnuplots output. 
See "help using" for more information.
If you are plotting mathematical expressions, the simplest 
way to get your desired result is to make a coordinate 
transformation as described by linear algebra.

HTH
Lars

Re: [Gnuplot-info] axis

[<HBB...@t-...>]

goon wrote:
> hai...I have a question about axis while ploting a graph in gnuplot. Can I
> change vertical axis from z axis to y axis. 

No --- but that's OK, since you don't really have to do that.

The terms "y axis" and "z axis" have several implied meanings, but those 
meanings are actually quite separate from each other.  In a simple 3D 
plot (e.g. of an explicit surface, or a data set equivalent to one), 'z' 
is often treated as synonymous of 'dependent variable', but that's 
purely convention.  If you don't want that convention, use parametric 
mode for function plots, or study the 'using' option for data.

In other words: the 'z' axis is always vertical in gnuplot --- but you 
can change which of your variables becomes gnuplot's "z".