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tensor

  

get_compts

  

return the components field of a tensor_type

  

get_char

  

return the index character field of a tensor_type

  

get_rank

  

return the rank of a tensor_type

 

Calling Sequence

Parameters

Description

Examples

Calling Sequence

get_compts(A)

get_char(A)

get_rank(A)

Parameters

A

-

tensor_type object

Description

Important: The tensor package has been deprecated. Use the superseding packages DifferentialGeometry and Physics instead.

• 

The function get_compts(A) returns the components of the tensor_type A.

• 

The function get_char(A) returns the index character of the tensor_type A.

• 

The function get_rank(A) returns the rank of the tensor_type A.

• 

These procedures are not absolutely necessary since the fields of any table can be accessed directly. However, they provide a uniform and controlled access of the information contained in the tensor_type data type.

• 

These functions are part of the tensor package, and so can be used in the form get_compts(..) / get_char(..) only after performing the command with(tensor), or with(tensor, get_compts) / with(tensor, get_char).  These functions can always be accessed in the long form tensor[get_compts](..) / tensor[get_char](..).

Examples

Important: The tensor package has been deprecated. Use the superseding packages DifferentialGeometry and Physics instead.

Get the components, index character, and rank of the tensor T:

withtensor:

Tcreate1,1,arrayw,x,0,y,z,0,0,y2,xyw

Ttablecompts=wx0yz00y2xyw,index_char=1,−1

(1)

get_comptsT

wx0yz00y2xyw

(2)

get_charT

1,−1

(3)

get_rankT

2

(4)

See Also

tensor(deprecated)

tensor(deprecated)[create]