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VectorCalculus[GetCoordinateParameters] - get coordinate system parameters

VectorCalculus[SetCoordinateParameters] - set coordinate system parameters

Calling Sequence

GetCoordinateParameters()

SetCoordinateParameters(a, b, c)

Parameters

a

-

algebraic; specify the first coordinate system parameter (default=1)

b

-

(optional) algebraic; specify the second coordinate system parameter (default=1/2)

c

-

(optional) algebraic; specify the third coordinate system parameter (default=1/3)

Description

• 

Several of the coordinate systems provided with the VectorCalculus package include up to 3 parameters in their definitions.  In the documentation for this package, these parameters are given the names a, b and c, as needed.

• 

The default values for these parameters are a=1, b=12, and c=13.

• 

These parameters can be queried and set by using the GetCoordinateParameters and SetCoordinateParameters commands.

• 

The GetCoordinateParameters command returns an expression sequence containing the current values of a, b, and c.

• 

The SetCoordinateParameters command takes 1, 2, or 3 arguments, and sets the values of a, a and b, or a, b, and c respectively.

Examples

withVectorCalculus:

SetCoordinateParametersα,β

SetCoordinatesconicalu,v,w

conicalu,v,w

(1)

V:=1,2,3

V:=eu+2ev+3ew

(2)

MapToBasisV,cartesian

6αβex+β2+4β29α2β2βey+α24α29α2β2αez

(3)

GetCoordinateParameters

α,β,13

(4)

See Also

VectorCalculus, VectorCalculus[AddCoordinates], VectorCalculus[Coordinates], VectorCalculus[GetCoordinates], VectorCalculus[MapToBasis], VectorCalculus[SetCoordinates], VectorCalculus[VectorField]


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