# subset: Subsets of Probability Spaces In prob: Elementary Probability on Finite Sample Spaces

## Description

This is a method for `subset()` for the case when the input object is a probability space of class `ps`.

## Usage

 ```1 2 3 4``` ```subset(x, ...) ## S3 method for class 'ps' subset(x, subset, ...) ```

## Arguments

 `x` a probability space. `subset` logical expression indicating elements or rows of `space` to keep: missing values are taken as false. `...` further arguments to be passed to or from other methods.

## Details

This function simply extends the existing `subset()` function to `ps` objects.

## Value

A `ps` object, a subset of a probability space.

## Author(s)

G. Jay Kerns gkerns@ysu.edu.

`intersect`, `setdiff`, `union`, `isin`

## Examples

 ```1 2 3 4 5``` ```L <- tosscoin(2) M <- urnsamples(L, 3) N <- probspace(M) subset(N, all(toss1=="H")) subset(N, any(toss2=="T")) ```

### Example output

```Loading required package: combinat

Attaching package: 'combinat'

The following object is masked from 'package:utils':

combn

Rmetrics Package fOptions
Pricing and Evaluating Basic Options
Copyright (C) 2005-2014 Rmetrics Association Zurich
Educational Software for Financial Engineering and Computational Science
Rmetrics is free software and comes with ABSOLUTELY NO WARRANTY.
https://www.rmetrics.org --- Mail to: info@rmetrics.org

Attaching package: 'VGAM'

The following object is masked from 'package:hypergeo':

is.zero

The following object is masked from 'package:fAsianOptions':

erf

Attaching package: 'prob'

The following objects are masked from 'package:base':

intersect, setdiff, union

\$outcomes
list()

\$probs
numeric(0)

attr(,"class")
 "ps"   "list"
\$outcomes
\$outcomes[]
toss1 toss2
1     H     H
2     T     H
3     H     T

\$outcomes[]
toss1 toss2
1     H     H
2     T     H
4     T     T

\$outcomes[]
toss1 toss2
1     H     H
3     H     T
4     T     T

\$outcomes[]
toss1 toss2
2     T     H
3     H     T
4     T     T

\$probs
 0.25 0.25 0.25 0.25

attr(,"class")
 "ps"   "list"
```

prob documentation built on May 2, 2019, 12:20 p.m.