design_b {DImodels} | R Documentation |

## The "design_b" Dataset

### Description

This dataset contains a set of proportions `p1`

to `p6`

where each row sums to 1. It is used as the design matrix for simulating other datasets in the `DImodels`

package.

### Usage

`data("design_b")`

### Format

A data frame with 47 observations on the following seven variables:

`richness`

A numeric vector indicating the number of species in the initial composition, i.e., the number of proportions from p1 to p6 that are >0.

`p1`

A numeric vector indicating a proportion (of species 1).

`p2`

A numeric vector indicating a proportion (of species 2).

`p3`

A numeric vector indicating a proportion (of species 3).

`p4`

A numeric vector indicating a proportion (of species 4).

`p5`

A numeric vector indicating a proportion (of species 5).

`p6`

A numeric vector indicating a proportion (of species 6).

### Details

The columns p1 to p6 form a simplex space.

### Examples

```
## Load the design_b data
data(design_b)
## View the first five entries
head(design_b)
## Explore the variables in design_b
str(design_b)
## Check that the proportions sum to 1 (required for DI models)
## p1 to p6 are in the 2nd to 7th columns in design_b
design_b_sums <- rowSums(design_b[2:7])
summary(design_b_sums)
```

*DImodels*version 1.3.2 Index]