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VectorCalculus

  

GetPVDescription

  

return a description of a position Vector in a specified coordinate system.

 

Calling Sequence

Parameters

Description

Examples

Calling Sequence

GetPVDescription(pvector)

GetPVDescription(pvector, c)

Parameters

pvector

-

Vector; the position Vector

c

-

name or name[name, name, ...]; specify the coordinate system, optionally indexed by the coordinate names

Description

• 

The GetPVDescription returns a list with the description of pvector in c coordinates.

• 

If no coordinate argument is provided, the description of pvector is given with respect to the current coordinate system as long as the dimensions match.

• 

The position Vector is always a cartesian Vector rooted at the origin, but its description varies with the choice of coordinates. For more details about position Vectors, see VectorCalculus,Details

Examples

withVectorCalculus:

pvPositionVectorpcosp,psinp,cartesianx,y

pv:=pcosppsinp

(1)

MGetPVDescriptionpv,polarr,t

M:=p2cosp2+p2sinp2,arctanpsinp,pcosp

(2)

pv2PositionVectorM,polarr,t

pv2:=pcosppsinp

(3)

carctanu

c:=arctanu

(4)

pv3PositionVectorcosucosc,sinucosc,sinc,cartesianx,y,z

pv3:=cosuu2+1sinuu2+1uu2+1

(5)

MGetPVDescriptionpv3,sphericalr,p,t

M:=cosu2u2+1+sinu2u2+1+u2u2+1,arctancosu2u2+1+sinu2u2+1,uu2+1,arctansinuu2+1,cosuu2+1

(6)

simplifyMassumingu::real

1,arctan1,u,arctansinu,cosu

(7)

See Also

VectorCalculus

VectorCalculus[About]

VectorCalculus[PlotPositionVector]

VectorCalculus[PositionVector]

 


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