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# polarplot

Plot polar coordinates

### Syntax

polarplot(theta,rho,[style,strf,leg,rect]) polarplot(theta,rho,<opt_args>)

### Arguments

- 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`

. See polyline properties 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. See polyline properties to see the line style 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. Note that negative rho values cause the corresponding curve points to be reflected across the origin.

### Example 3

t = 0:0.01:2*%pi; polarplot(t, -1 + sin(t));

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