Man Scilab

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" .
  • default The 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])

 
  

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