Scilab Function
Last update : 28/12/2008
polarplot - Plot polar
coordinates
Calling Sequence
- polarplot(theta,rho,[style,strf,leg,rect])
- polarplot(theta,rho,<opt_args>)
Parameters
-
rho: a vector, the radius values
-
theta: a vector with same size than rho, the angle values.
-
<opt_args>: a sequence of statements key1=value1, key2=value2, ... where keys may be
style,leg,rect,strf
or frameflag
-
style: is a real row vector of size nc. The style to use for curve
i is defined by style(i). The default
style is 1:nc (1 for the first curve, 2 for the second,
etc.).
-
-if style(i) is negative, the curve is plotted
using the mark with id abs(style(i))+1; use
xset() to see the mark ids.
-
-if style(i) is strictly positive, a plain
line with color id style(i) or a dashed line with
dash id style(i) is used; use xset()
to see the color ids.
-
-When only one curve is drawn, style can be
the row vector of size 2 [sty,pos] where
sty is used to specify the style and
pos is an integer ranging from 1 to 6 which
specifies a position to use for the caption. This can be
useful when a user wants to draw multiple curves on a plot by
calling the function plot2d several times and
wants to give a caption for each curve.
-
strf: is a string of length 3 "xy0".
-
defaultThe default is "030".
-
x: controls the display of captions,
-
x=0: no captions.
-
x=1: captions are displayed. They are given by the
optional argument leg.
-
y: controls the computation of the frame. same as
frameflag
-
y=0: the current boundaries (set by a previous call to
another high level plotting function) are used. Useful
when superposing multiple plots.
-
y=1: the optional argument rect is used to
specify the boundaries of the plot.
-
y=2: the boundaries of the plot are computed using min
and max values of x and
y.
-
y=3: like y=1 but produces isoview
scaling.
-
y=4: like y=2 but produces isoview
scaling.
-
y=5: like y=1 but plot2d can
change the boundaries of the plot and the ticks of the
axes to produce pretty graduations. When the zoom button
is activated, this mode is used.
-
y=6: like y=2 but plot2d can
change the boundaries of the plot and the ticks of the
axes to produce pretty graduations. When the zoom button
is activated, this mode is used.
-
y=7: like y=5 but the scale of the new
plot is merged with the current scale.
-
y=8: like y=6 but the scale of the new
plot is merged with the current scale.
-
leg: a string. It is used when the first character x of argument
strf is 1. leg has the form
"leg1@leg2@...." where leg1,
leg2, etc. are respectively the captions of the first
curve, of the second curve, etc. The default is "".
-
rect: This argument is used when the second character y of argument
strf is 1, 3 or 5. It is a row vector of size 4 and
gives the dimension of the frame:
rect=[xmin,ymin,xmax,ymax].
Description
polarplot creates a polar coordinate plot of the angle theta versus the
radius rho. theta is the angle from the x-axis to the radius vector
specified in radians; rho is the length of the radius vector specified in
dataspace units.
Examples
t= 0:.01:2*%pi;
clf();polarplot(sin(7*t),cos(8*t))
clf();polarplot([sin(7*t') sin(6*t')],[cos(8*t') cos(8*t')],[1,2])