Thermimage (version 2.1)

areacylinder: Provides the surface area of a cylinder.

Description

Provides the surface area of a cylinder, including the circular bases.

Usage

areacylinder(Radius, radius=Radius, height, ends = 2)

Arguments

Radius

The major radius of the base of the cylinder.

radius

The minor radius of the base of the cylinder. Default is to equal the major Radius in the case of a circular base.

height

The height of the cylinder (alternatively, the length of a horizontal cylinder)

ends

How many ends to include in the surface area calculation (2=both ends, 1=one end, 0=neither end)

Examples

## The function is currently defined as
function(Radius, radius=Radius, height, ends=2)
{
  Area <- (Radius+radius)*pi*height + ends*pi*Radius*radius
  Area
  }

# Example calculation:

# Typically, a body part might be modelled as cylindrical if it appears to be approximately
# circular or elliptical and elongated.  By measuring the major diameter (D) and minor
# diameter (d) as well as the length or height (l), the overall surface area can be 
# determined:

D<-12
d<-6
l<-18
areacylinder(Radius=D/2, radius=d/2, height=l, ends=2)


# To only show surface area of the exposed surface, and exclude the oval base of the 
# cylinder, set ends=0

areacylinder(Radius=D/2, radius=d/2, height=l, ends=0)