R: Return number of observations for statistical models

nObs {miscTools} | R Documentation

## Return number of observations for statistical models

### Description

Returns number of observations for statistical models. The default method assumes presence of a component `param$nObs` in `x`.

### Usage

    nObs(x, ...)
    ## Default S3 method:
    nObs(x, ...)
    ## S3 method for class 'lm'
    nObs(x, ...)

### Arguments

`x` | a statistical model, such as created by `lm`
`...` | further arguments for methods

### Details

This is a generic function. The default method returns the component `x$param$nObs`. The `lm`-method is based on qr-decomposition, in the same way as the does `summary.lm`.

### Value

numeric, number of observations

### Author(s)

Ott Toomet, otoomet@econ.au.dk

### See Also

`nParam`

### Examples

    # Construct a simple OLS regression:
    x1 <- runif(100)
    x2 <- runif(100)
    y <- 3 + 4*x1 + 5*x2 + rnorm(100)
    m <- lm(y~x1+x2)  # estimate it
    nObs(m)

[Package miscTools version 0.6-22 Index]