Generate random samples from an exponential distribution
R/sdf_stat.R
sdf_rexp
Description
Generator method for creating a single-column Spark dataframes comprised of i.i.d. samples from an exponential distribution.
Usage
sdf_rexp(sc, n, rate = 1, num_partitions = NULL, seed = NULL, output_col = "x") Arguments
| Arguments | Description |
|---|---|
| sc | A Spark connection. |
| n | Sample Size (default: 1000). |
| rate | Rate of the exponential distribution (default: 1). The exponential distribution with rate lambda has mean 1 / lambda and density f(x) = lambda e ^- lambda x . |
| num_partitions | Number of partitions in the resulting Spark dataframe (default: default parallelism of the Spark cluster). |
| seed | Random seed (default: a random long integer). |
| output_col | Name of the output column containing sample values (default: “x”). |
See Also
Other Spark statistical routines: sdf_rbeta(), sdf_rbinom(), sdf_rcauchy(), sdf_rchisq(), sdf_rgamma(), sdf_rgeom(), sdf_rhyper(), sdf_rlnorm(), sdf_rnorm(), sdf_rpois(), sdf_rt(), sdf_runif(), sdf_rweibull()