Revision **9100f830886add1b0881d43e25f1e88da3fdf95f** authored by Karline Soetaert on **15 March 2011, 00:00:00 UTC**, committed by Gabor Csardi on **15 March 2011, 00:00:00 UTC**

Tip revision: **9100f830886add1b0881d43e25f1e88da3fdf95f** authored by ** Karline Soetaert ** on **15 March 2011, 00:00:00 UTC**

**version 1.3.1**

Tip revision: **9100f83**

geometries.rd

```
\name{g.sphere}
\alias{g.sphere}
\alias{g.spheroid}
\alias{g.cylinder}
\title{
Surface Area and Volume of Geometrical Objects
}
\description{
\itemize{
\item \code{g.sphere} the surface and volume of a sphere
\item \code{g.spheroid} the surface and volume of a spheroid
\item \code{g.cylinder} the surface and volume of a cylinder;
note that the surface area calculation ignores the top and bottom.
}
}
\usage{
g.sphere(x)
g.spheroid (x, b = 1)
g.cylinder (x, L = 1)
}
\arguments{
\item{x }{the radius
}
\item{b }{the ratio of long/short radius of the spheroid;
if b<1: the spheroid is oblate.
}
\item{L }{the length of the cylinder
}
}
\value{
A list containing:
\item{surf }{the surface area
}
\item{vol }{the volume
}
}
\author{
Filip Meysman <f.meysman@nioo.knaw.nl>,
Karline Soetaert <k.soetaert@nioo.knaw.nl>
}
\examples{
mf <- par(mfrow = c(3, 2))
x <- seq(from = 0, to = 1, length = 10)
plot(x, g.sphere(x)$surf, main = "sphere surface")
plot(x, g.sphere(x)$vol, main = "sphere volume")
plot(x, g.spheroid(x, b = 0.5)$surf, main = "spheroid surface")
plot(x, g.spheroid(x, b = 0.5)$vol, main = "spheroid volume")
plot(x, g.cylinder(x, L = 1)$surf, main = "cylinder surface")
plot(x, g.cylinder(x, L = 1)$vol, main = "cylinder volume")
par("mfrow" = mf)
}
\keyword{utilities}
```

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