areacone: Provides the surface are of a cone In Thermimage: Thermal Image Analysis

Description

Provides the surface area of a cone with an elliptical base. For a circular cone, simply use Radius=radius.

Usage

 `1` ```areacone(Radius, radius=Radius, hypotenuse=NULL, height, ends=1) ```

Arguments

 `Radius` The Radius of the major axis of the base of the cone. `radius` The radius of the minor axis of the base of the cone. `hypotenuse` The hypotenuse of the height of the cone (if blank, determined from radius and height) `height` The height of the cone (if hypotenuse is known, leave height blank) `ends` To include the base area in surface area calculation, set ends = 1, otherwise set ends = 0.

Details

Calculates the surface are of a cone with an elliptical base.

Author(s)

Glenn J Tattersall

Examples

 ``` 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33``` ```## The function is currently defined as function(Radius, radius=Radius, hypotenuse=NULL, height, ends=1) { if(is.null(hypotenuse)){ hypotenuse<-sqrt(height^2+Radius^2) } Area <- ends*pi*Radius*radius + pi*Radius*hypotenuse Area } # Example calculation from a measure of a bird bill. # Typically, a bird bill will be measured by its depth (d) at the base, its width (w) at the # base and by its overall length. The length (l) is typically measured along the length of # the culmen, and thus is a diagonal measure along the hypotenuse of the cone. d<-12 w<-6 l<-18 areacone(Radius=d/2, radius=w/2, hypotenuse=l, height=NULL, ends=1) # If the perpendicular cone height (h) is instead measured, rather than the hypotenuse, then # substitute h for height and assign hypotenuse = NULL, to obtain the same result h<-sqrt(l^2-(d/2)^2) areacone(Radius=d/2, radius=w/2, hypotenuse=NULL, height=h, ends=1) # To only show surface area of the exposed surface, and exclude the oval base of the cone # set ends=0: areacone(Radius=d/2, radius=w/2, hypotenuse=l/2, height=NULL, ends=0) ```

Thermimage documentation built on Nov. 6, 2018, 1:03 a.m.