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pwp

Returns the vectors of indirect influences and indirect dependences and the matrix of indirect influences according with the PWP method.

Calling Sequence

pwp(D,lambda) // Show the vector of indirect influences, always needs the parameters D and lambda.
[T,d,f]=pwp(D,lambda) // Show the vector of indirect influences f, the vector of indirect dependences d and the matrix T of indirect influences.

Parameters

lambda:

Value of the parameter for the PWP method, look the bibliography.

D:

Matrix of direct influences.

f:

Name of the variable to store the indirect influences vector.

d:

Name of the variable to store the indirect dependences vector.

T:

Name of the variable to store the indirect influences matrix.

Description

This function gives the vector of indirect influences and dependences and the matrix of indirect influences of a given matrix of direct influences according with the PWP method. If the matrix of direct influences has polynomial entries the function asks for a time parameter. For more info look the bibliography.

Examples

D = [1 0 1;0 0 0;0 0 6] // Define the matrix of direct influences.
[T,d,f] = pwp(D,1)  // Returns the matrix of indirect influences T, the vector of indirect dependences d and the vector of indirect influences f.
[T,d,f] = micmac(D,0.9)  // The same as above but with lambda equal to 0.9.
t=poly(0,'t')  // Define the variable t.
D = [t 1-t;t^2 1] // Define a 2x2 matrix with polynomial entries.
[T,d,f] = pwp(D,1) // Apply the PWP method to matrix D, the function ask for a time parameter.

See also

Authors

Bibliography

Indirect Influences, Rafael Díaz. preprint http://arxiv.org/abs/0906.1610v1

Cálculo de Influencias Indirectas en Scilab. Rafael Díaz, Jorge Catumba.

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