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See the recommended documentation of this function
xsegs
draw unconnected segments
Syntax
xsegs(xv, yv, [style]) xsegs(xv, yv, zv,[style])
Arguments
- xv, yv, zv
matrices of the same size. If
zv
is not specified, a zero vector is used.- style
vector or scalar. If
style
is a positive scalar, it gives the color to use for all segments. Ifstyle
is a negative scalar, then current color is used. Ifstyle
is a vector, thenstyle(i)
gives the color to use for segmenti
.
Description
xsegs
draws a set of unconnected segments given
by xv
, yv
and
zv
. If xv
,
yv
and zv
are matrices they
are considered as vectors by concatenating their columns. The
coordinates of the two points defining a segment are given by two
consecutive values of xv
, yv
and zv
:
(xv(i),yv(i),zv(i))-->(xv(i+1),yv(i+1),zv(i+1))
.
For instance, using matrices of size (2,n)
, the
segments can be defined by:
xv=[xi_1 xi_2 ...; xf_1 xf_2...] yv=[yi_1 yi_2 ...; yf_1 yf_2...] zv=[zi_1 zi_2 ...; zf_1 zf_2...]
and the segments are (xi_k,yi_k,zi_k)-->(xf_k,yf_k,zf_k)
.
Examples
// 2D example x=2*%pi*(0:9)/10; xv=[sin(x);9*sin(x)]; yv=[cos(x);9*cos(x)]; plot2d([-10,10],[-10,10],[-1,-1],"022") xsegs(xv,yv,1:10)
// 2D example plot2d([-10,10],[-10,10],[-1,-1],"022") xsegs([9, -9],[9 , -9]) // Draw the line from X(9,9) to Y(-9, -9) xsegs([5, -2],[4 , -1]) // Draw the line from X(5,4) to Y(-2, -1)
// 3D example clf(); a=gca(); a.view="3d"; f=gcf(); f.color_map=rainbowcolormap(120); alpha=2*%pi*(0:119)/40; xv=[sin(alpha)/2;sin(alpha)/3]; yv=[cos(alpha)/2;cos(alpha)/3]; zv=[alpha/8;alpha/8]; xsegs(xv,yv,zv,1:120); // Now adjust the data_bounds a.data_bounds = [min(xv) min(yv) min(zv); ... max(xv) max(yv) max(zv)]; // We can add an arrow to each segs e = gce(); e.arrow_size = 0.4;
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