| Type: | Package |
| Title: | Weighted Ordered Weighted Average |
| Version: | 1.0.2 |
| Date: | 2022-05-22 |
| Maintainer: | Gleb Beliakov <gleb@deakin.edu.au> |
| Author: | Gleb Beliakov [aut, cre], Daniela Calderon [aut] |
| Description: | Introduce weights into Ordered Weighted Averages and extend bivariate means based on n-ary tree construction. Please refer to the following: G. Beliakov, H. Bustince, and T. Calvo (2016, ISBN: 978-3-319-24753-3), G. Beliakov(2018) <doi:10.1002/int.21913>, G. Beliakov, J.J. Dujmovic (2016) <doi:10.1016/j.ins.2015.10.040>, J.J. Dujmovic and G. Beliakov (2017) <doi:10.1002/int.21828>. |
| License: | LGPL-3 |
| LazyData: | FALSE |
| Imports: | Rcpp (≥ 1.0.0) |
| LinkingTo: | Rcpp |
| RoxygenNote: | 5.0.1 |
| NeedsCompilation: | yes |
| Copyright: | Gleb Beliakov |
| Packaged: | 2022-05-24 00:50:36 UTC; gleb |
| Repository: | CRAN |
| Date/Publication: | 2022-05-24 08:30:01 UTC |
WOWA package
Description
Various weighted multivariate extensions of bivariate and OWA functions, including implicit, quantifier-based and binary tree based WOWA.
Usage
wowa()
Details
Lists the functions implemented in this package.
Value
output |
No return value, called for printing only. |
Author(s)
Gleb Beliakov, Daniela L. Calderon, Deakin University
References
[1]G. Beliakov, H. Bustince, and T. Calvo. A Practical Guide to Averaging Functions. Springer, Berlin, Heidelberg, 2016.
[2]G. Beliakov. A method of introducing weights into OWA operators and other symmetric functions. In V. Kreinovich, editor, Uncertainty Modeling. Dedicated to B. Kovalerchuk, pages 37-52. Springer, Cham, 2017.
[3]G. Beliakov. Comparing apples and oranges: The weighted OWA function, Int.J. Intelligent Systems, 33, 1089-1108, 2018.
[4]V. Torra. The weighted OWA operator. Int. J. Intelligent Systems, 12:153-166, 1997.
[5]G. Beliakov and J.J. Dujmovic , Extension of bivariate means to weighted means of several arguments by using binary trees, Information sciences, 331, 137-147, 2016.
[6] J.J. Dujmovic and G. Beliakov. Idempotent weighted aggregation based on binary aggregation trees. Int. J. Intelligent Systems 32, 31-50, 2017.
Examples
wowa()
Impicit Weighted OWA Computation Function
Description
Function for Calculating implicit Weighted OWA function
Usage
wowa.ImplicitWOWA(x, p, w, n)
Arguments
x |
The vector of inputs |
p |
The weights of inputs x |
w |
The OWA weightings vector |
n |
Dimension of the vector x |
Value
output |
The value of the Impicit Weighted OWA |
Author(s)
Gleb Beliakov, Daniela L. Calderon, Deakin University
References
[1]G. Beliakov, H. Bustince, and T. Calvo. A Practical Guide to Averaging Functions. Springer, Berlin, Heidelberg, 2016.
[2]G. Beliakov. A method of introducing weights into OWA operators and other symmetric functions. In V. Kreinovich, editor, Uncertainty Modeling. Dedicated to B. Kovalerchuk, pages 37-52. Springer, Cham, 2017.
[3]G. Beliakov. Comparing apples and oranges: The weighted OWA function, Int.J. Intelligent Systems, 33, 1089-1108, 2018.
[4]V. Torra. The weighted OWA operator. Int. J. Intelligent Systems, 12:153-166, 1997.
[5]G. Beliakov and J.J. Dujmovic , Extension of bivariate means to weighted means of several arguments by using binary trees, Information sciences, 331, 137-147, 2016.
[6] J.J. Dujmovic and G. Beliakov. Idempotent weighted aggregation based on binary aggregation trees. Int. J. Intelligent Systems 32, 31-50, 2017.
Examples
n <- 4
example <- wowa.ImplicitWOWA(c(0.3,0.4,0.8,0.2), c(0.3,0.25,0.3,0.15),
c(0.4,0.35,0.2,0.05), n)
example
Ordered weigted average function
Description
Function for computing the ordered weigted averages
Usage
wowa.OWA(n, x, w)
Arguments
n |
Dimension of the vector x |
x |
The vector of inputs |
w |
The OWA weights |
Value
output |
The value of the ordered weighted average. |
Author(s)
Gleb Beliakov, Daniela L. Calderon, Deakin University
References
[1]G. Beliakov, H. Bustince, and T. Calvo. A Practical Guide to Averaging Functions. Springer, Berlin, Heidelberg, 2016.
Examples
n <- 4
wowa.OWA(n, c(0.3,0.4,0.8,0.2), c(0.4,0.35,0.2,0.05))
WAM computation
Description
Function for calculating the Weighted Arithmetic Mean
Usage
wowa.WAM(n, x, w)
Arguments
n |
Dimension of the array x |
x |
The vector of inputs |
w |
The vector of weights |
Value
output |
The value of the WAM function |
Author(s)
Gleb Beliakov, Daniela L. Calderon, Deakin University
References
[1]G. Beliakov, H. Bustince, and T. Calvo. A Practical Guide to Averaging Functions. Springer, Berlin, Heidelberg, 2016.
Examples
n <- 4
wowa.WAM(n, c(0.3,0.4,0.8,0.2), c(0.3,0.25,0.3,0.15) )
Extension of binary averaging
Description
Function for calculating a binary tree multivariate extension of a binary averaging function
Usage
wowa.WAn(x, w, n, Fn, L)
Arguments
x |
Vector of inputs |
w |
The weightings vector |
n |
Dimension of the array x (and w) |
Fn |
Bivariate symmetric mean that is extended to n arguments |
L |
The number of levels of the binary tree (see docs) |
Value
output |
The output is Weighted n-variate mean extending Fn |
Author(s)
Gleb Beliakov, Daniela L. Calderon, Deakin University
References
[1]G. Beliakov, H. Bustince, and T. Calvo. A Practical Guide to Averaging Functions. Springer, Berlin, Heidelberg, 2016.
[2]G. Beliakov. A method of introducing weights into OWA operators and other symmetric functions. In V. Kreinovich, editor, Uncertainty Modeling. Dedicated to B. Kovalerchuk, pages 37-52. Springer, Cham, 2017.
[3]G. Beliakov. Comparing apples and oranges: The weighted OWA function, Int.J. Intelligent Systems, 33, 1089-1108, 2018.
[4]V. Torra. The weighted OWA operator. Int. J. Intelligent Systems, 12:153-166, 1997.
[5]G. Beliakov and J.J. Dujmovic , Extension of bivariate means to weighted means of several arguments by using binary trees, Information sciences, 331, 137-147, 2016.
[6] J.J. Dujmovic and G. Beliakov. Idempotent weighted aggregation based on binary aggregation trees. Int. J. Intelligent Systems 32, 31-50, 2017.
Examples
Fn <- function( x, y) { # just a simple arithmetic mean,
# but can be more complex functions (eg heronian, Logaritmic means)
out <- (x+y)/2
return(out)
}
n <- 4
example <- wowa.WAn(c(0.3,0.4,0.8,0.2), c(0.4,0.3,0.2,0.1), n, Fn, 10)
example
WOWA value computation Function
Description
Function for calculating the value of the quantifier-based WOWA function
Usage
wowa.weightedOWAQuantifier(x, p, w, n, spl)
Arguments
x |
The vector of inputs |
p |
The weights of inputs x |
w |
The OWA weightings vector |
n |
The dimension of the array x |
spl |
A structure that keeps the spline knots and coefficients computed in weightedOWAQuantifierBuild function |
Value
output |
The output is quantifier-based WOWA value |
Author(s)
Gleb Beliakov, Daniela L. Calderon, Deakin University
References
[1]G. Beliakov, H. Bustince, and T. Calvo. A Practical Guide to Averaging Functions. Springer, Berlin, Heidelberg, 2016.
[2]G. Beliakov. A method of introducing weights into OWA operators and other symmetric functions. In V. Kreinovich, editor, Uncertainty Modeling. Dedicated to B. Kovalerchuk, pages 37-52. Springer, Cham, 2017.
[3]G. Beliakov. Comparing apples and oranges: The weighted OWA function, Int.J. Intelligent Systems, 33, 1089-1108, 2018.
[4]V. Torra. The weighted OWA operator. Int. J. Intelligent Systems, 12:153-166, 1997.
[5]G. Beliakov and J.J. Dujmovic , Extension of bivariate means to weighted means of several arguments by using binary trees, Information sciences, 331, 137-147, 2016.
[6] J.J. Dujmovic and G. Beliakov. Idempotent weighted aggregation based on binary aggregation trees. Int. J. Intelligent Systems 32, 31-50, 2017.
Examples
n <- 4
pweights=c(0.3,0.25,0.3,0.15);
wweights=c(0.4,0.35,0.2,0.05);
tempspline <- wowa.weightedOWAQuantifierBuild(pweights,wweights , n)
wowa.weightedOWAQuantifier(c(0.3,0.4,0.8,0.2), pweights, wweights, n, tempspline)
RIM quantifier of the Weighted OWA function
Description
Function for building the RIM quantifier of the Weighted OWA function
Usage
wowa.weightedOWAQuantifierBuild(p, w, n)
Arguments
p |
The weights of inputs x |
w |
The OWA weightings vector |
n |
The dimension of the vectors p,w |
Value
output |
A structure which has fields: spl, which keeps the spline knots and coefficients for later use in weightedOWAQuantifier, and Tnum, the number of knots in the monotone spline |
Author(s)
Gleb Beliakov, Daniela L. Calderon, Deakin University
References
[1]G. Beliakov, H. Bustince, and T. Calvo. A Practical Guide to Averaging Functions. Springer, Berlin, Heidelberg, 2016.
[2]G. Beliakov. A method of introducing weights into OWA operators and other symmetric functions. In V. Kreinovich, editor, Uncertainty Modeling. Dedicated to B. Kovalerchuk, pages 37-52. Springer, Cham, 2017.
[3]G. Beliakov. Comparing apples and oranges: The weighted OWA function, Int.J. Intelligent Systems, 33, 1089-1108, 2018.
[4]V. Torra. The weighted OWA operator. Int. J. Intelligent Systems, 12:153-166, 1997.
[5]G. Beliakov and J.J. Dujmovic , Extension of bivariate means to weighted means of several arguments by using binary trees, Information sciences, 331, 137-147, 2016.
[6] J.J. Dujmovic and G. Beliakov. Idempotent weighted aggregation based on binary aggregation trees. Int. J. Intelligent Systems 32, 31-50, 2017.
Examples
n <- 4
pweights=c(0.3,0.25,0.3,0.15);
wweights=c(0.4,0.35,0.2,0.05);
tspline <- wowa.weightedOWAQuantifierBuild(pweights,wweights , n)
wowa.weightedOWAQuantifier(c(0.3,0.4,0.8,0.2), pweights, wweights, n, tspline)
Weighted extension of the OWA function
Description
Function for extending order weigted averages and other multivariate symmetric functions
Usage
wowa.weightedf(x, p, w, n, Fn, L)
Arguments
x |
The vector of inputs |
p |
The weights of inputs x |
w |
The OWA weightings vector |
n |
The dimension of the vector x |
Fn |
Base n-variate symmetric function defined in R |
L |
The number of levels of the n-ary tree (see docs) |
Value
output |
The output is the weighted ordered weigted average. |
Author(s)
Gleb Beliakov, Daniela L. Calderon, Deakin University
References
[1]G. Beliakov, H. Bustince, and T. Calvo. A Practical Guide to Averaging Functions. Springer, Berlin, Heidelberg, 2016.
[2]G. Beliakov. A method of introducing weights into OWA operators and other symmetric functions. In V. Kreinovich, editor, Uncertainty Modeling. Dedicated to B. Kovalerchuk, pages 37-52. Springer, Cham, 2017.
[3]G. Beliakov. Comparing apples and oranges: The weighted OWA function, Int.J. Intelligent Systems, 33, 1089-1108, 2018.
[4]V. Torra. The weighted OWA operator. Int. J. Intelligent Systems, 12:153-166, 1997.
[5]G. Beliakov and J.J. Dujmovic , Extension of bivariate means to weighted means of several arguments by using binary trees, Information sciences, 331, 137-147, 2016.
[6] J.J. Dujmovic and G. Beliakov. Idempotent weighted aggregation based on binary aggregation trees. Int. J. Intelligent Systems 32, 31-50, 2017.
Examples
Fn <- function(n, x, w) {
out <- 0.0
for(i in 1:n) out<- out+x[i]*w[i];
#print(out)
return(out)
}
n <- 4
example <- wowa.weightedf(c(0.3,0.4,0.8,0.2), c(0.3,0.25,0.3,0.15),
c(0.4,0.35,0.2,0.05), n, Fn, 10)
example