Description Usage Arguments Details Value Author(s) See Also Examples
This function generates m random long only benchmark portfolios with n investments where the sume of the weights equals a given amount. The weights are naively derived from an i.i.d. sample of truncated random variables.
1 2 3 4 | rbenchmark(m, n = 2, k = n, segments = NULL, x.t = 1,
margins = c("unif", "beta", "exp", "frechet",
"gamma", "gev", "gpd", "gumbel", "lnorm", "logis", "norm",
"weibull"), ...)
|
m |
A positive integer value for the number of portfolios |
n |
A positive integer for the number of investments in the portfolio |
k |
A positive integer for the number of non-zero exposures or cardinality |
segments |
A vector or list of vectors that defines the investment segments |
x.t |
A positive real value for the sum of the investment exposures |
margins |
A character value for the underlying distribution of the truncated random variable. The default is a uniform distribution |
... |
Other arguments passed to the random variate simulation function |
The function executes the function random.benchmark
using the R function
sapply. The result returned is the transpose of the matrix generated in the previous
step.
A numeric m \times n matrix. The rows are the portfolios and the columns are the investment weights for each portfolio
Frederick Novomestky fn334@nyu.edu
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 | ###
### 100 long only portfolios of 30 investments with 30 non-zero positions
### the margins of the truncated random variables are uniform
###
p.1.matrix <- rbenchmark( 100, 30 )
###
### 100 long only portfolios of 30 investments with 10 non-zero positions
### the margins of the truncated random variables are uniform
###
p.2.matrix <- rbenchmark( 100, 30, 10 )
###
### 100 long only portfolios of 30 investments with 30 non-zero positions
### the margins of the truncated random variables are log normal
### with zero log mean and unit log standard deviation
###
p.3.matrix <- rbenchmark( 100, 30, margins="lnorm", meanlog=0, sdlog=1 )
###
### 100 long only portfolios of 30 investments with 10 non-zero positions
### the margins of the truncated random variables are log norm
### with zero log mean and unit log standard deviation
###
p.4.matrix <- rbenchmark( 100, 30, 10, margins="lnorm", meanlog=0, sdlog=1 )
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