# polar.plot: Plot values on a circular grid of 0 to 360 degrees In plotrix: Various Plotting Functions

## Description

polar.plot displays a plot of radial lines, symbols or a polygon centered at the midpoint of the plot frame on a 0:360 circle. Positions are interpreted as beginning at the right and moving counterclockwise unless start specifies another starting point or clockwise is TRUE.

If add=TRUE is passed as one of the additional arguments, the values will be added to the current plot. If a radial.lim argument was passed on the initial plot, it must be passed again to add values or the values will be displayed incorrectly.

## Usage

 ```1 2``` ``` polar.plot(lengths,polar.pos=NULL,labels,label.pos=NULL, start=0,clockwise=FALSE,rp.type="r",...) ```

## Arguments

 `lengths` numeric data vector. Magnitudes will be represented as the radial positions of symbols, line ends or polygon vertices. `polar.pos` numeric vector of positions on a 0:360 degree circle. These will be converted to radians when passed to radial.plot. `labels` text labels to place on the periphery of the circle. This defaults to labels every 20 degrees. For no labels, pass an empty string. `label.pos` positions of the peripheral labels in degrees `start` The position for zero degrees on the plot in degrees. `clockwise` Whether to increase angles clockwise rather than the default counterclockwise. `rp.type` Whether to plot radial lines, symbols or a polygon. `...` additional arguments passed to radial.plot and then to plot.

## Value

A list of the parameters altered by radial.plot.

## Author(s)

Jim Lemon

 ```1 2 3 4 5 6 7``` ``` testlen<-c(rnorm(36)*2+5) testpos<-seq(0,350,by=10) polar.plot(testlen,testpos,main="Test Polar Plot",lwd=3,line.col=4) oldpar<-polar.plot(testlen,testpos,main="Test Clockwise Polar Plot", radial.lim=c(0,15),start=90,clockwise=TRUE,lwd=3,line.col=4) # reset everything par(oldpar) ```
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