g.sphere {ReacTran}

Surface Area and Volume of Geometrical Objects

Description

• g.sphere the surface and volume of a sphere

• g.spheroid the surface and volume of a spheroid

• 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

x

the radius

b

the ratio of long/short radius of the spheroid; if b<1: the spheroid is oblate.

L

the length of the cylinder

Value

A list containing:

surf

the surface area

vol

the volume

Author(s)

Filip Meysman <[e-mail]>, Karline Soetaert <[e-mail]>

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)