Re: [Gnuplot-info] axis color, point type & point thickness

[Thomas S. <t.s...@fz...>]

Martin Genet <mgenet <at> lbl.gov> writes:

> 
> Dear GNUPlot:
> 
> I have three questions:
> 
> 1) Suppose I plot on the same graph a first curve using one color and axes
xy1, and a second curve using another
> color and axes xy2. Is there a way to have y1 axis, tics & label of the same
color as the first curve, and y2
> axis, tics & label of the same color as the second curve? (Actually, by hand I
know how to do the label and
> tics…but the axis?)

either by defining some arrows covering the axes:

set arrow 1 from graph 0,0 to graph 0,1 lt 1 lw 2
set arrow 2 from graph 1,0 to graph 1,1 lt 2 lw 2

or by using 'multiplot' with fixed margins:

reset

set bmargin 2
set lmargin 7
set rmargin 7
set tmargin 2

set multiplot

unset xtics
set ytics nomirror
unset y2tics
set border 2 linetype 1 linewidth 2
plot sin(x) axes x1y1 linetype 1 notitle

unset xtics
unset ytics
set y2tics nomirror
set border 8 linetype 2 linewidth 2
plot 2.*cos(x) axes x1y2 linetype 2 notitle

set xtics nomirror
unset ytics
unset y2tics
set border 1 linetype -1 linewidth 1
plot sin(x) notitle

unset multiplot

> 2) Suppose I plot points in a 3D graph. Is there a point type representing a
small cube, similar to the small
> square existing for 2D graphs? (I know a small square is possible in 3D, but I
don't really like it.)

as far as i know, no

this 'point' should be a 3-dim object, you could simulate this
by placing little 'plots' where you want to have cubes:

datafile.dat:

-1 -1 -1
-1  1 -1
-1  1  1
-1 -1  1
-1 -1 -1

1 -1 -1
1  1 -1
1  1  1
1 -1  1
1 -1 -1

plot script:

set xrange [-10:10]
set yrange [-10:10]
set zrange [-10:10]
splot 'datafile.dat' using 1:2:3 with lines linetype 1, \
'' using (0.1*$1+1.):(0.1*$2-2.):(0.1*$3+2.) w l lt 1, \
'' using (0.5*$1-3.):(0.5*$2+2.):(0.5*$3-2.) w l lt 1

> 3) Suppose I plot points using crosses. Is there a way to change the thickness
of the lines of the cross?

plot ... with points linewidth 3

> Many thanks in advance for your precious help.
> 
> Martin