Glance at a(n) speedlm object

Glance accepts a model object and returns a tibble::tibble() with exactly one row of model summaries. The summaries are typically goodness of fit measures, p-values for hypothesis tests on residuals, or model convergence information.

Glance never returns information from the original call to the modeling function. This includes the name of the modeling function or any arguments passed to the modeling function.

Glance does not calculate summary measures. Rather, it farms out these computations to appropriate methods and gathers the results together. Sometimes a goodness of fit measure will be undefined. In these cases the measure will be reported as NA.

Glance returns the same number of columns regardless of whether the model matrix is rank-deficient or not. If so, entries in columns that no longer have a well-defined value are filled in with an NA of the appropriate type.

Usage

# S3 method for class 'speedlm'
glance(x, ...)

Arguments

x

A speedlm object returned from speedglm::speedlm().

...

Additional arguments. Not used. Needed to match generic signature only. Cautionary note: Misspelled arguments will be absorbed in ..., where they will be ignored. If the misspelled argument has a default value, the default value will be used. For example, if you pass conf.lvel = 0.9, all computation will proceed using conf.level = 0.95. Two exceptions here are:

• tidy() methods will warn when supplied an exponentiate argument if it will be ignored.

• augment() methods will warn when supplied a newdata argument if it will be ignored.

See also

speedglm::speedlm()

Other speedlm tidiers: augment.speedlm(), glance.speedglm(), tidy.speedglm(), tidy.speedlm()

Value

A tibble::tibble() with exactly one row and columns:

adj.r.squared

Adjusted R squared statistic, which is like the R squared statistic except taking degrees of freedom into account.

AIC

Akaike's Information Criterion for the model.

BIC

Bayesian Information Criterion for the model.

deviance

Deviance of the model.

df

Degrees of freedom used by the model.

df.residual

Residual degrees of freedom.

logLik

The log-likelihood of the model. [stats::logLik()] may be a useful reference.

nobs

Number of observations used.

p.value

P-value corresponding to the test statistic.

r.squared

R squared statistic, or the percent of variation explained by the model. Also known as the coefficient of determination.

statistic

F-statistic.

Examples

# load modeling library
library(speedglm)

# fit model
mod <- speedlm(mpg ~ wt + qsec, data = mtcars, fitted = TRUE)

# summarize model fit with tidiers
tidy(mod)
#> # A tibble: 3 × 5
#>   term        estimate std.error statistic  p.value
#>   <chr>          <dbl>     <dbl>     <dbl>    <dbl>
#> 1 (Intercept)   19.7       5.25       3.76 7.65e- 4
#> 2 wt            -5.05      0.484    -10.4  2.52e-11
#> 3 qsec           0.929     0.265      3.51 1.50e- 3
glance(mod)
#> # A tibble: 1 × 11
#>   r.squared adj.r.squared statistic  p.value    df logLik   AIC   BIC
#>       <dbl>         <dbl>     <dbl>    <dbl> <int>  <dbl> <dbl> <dbl>
#> 1     0.826         0.814      69.0 9.39e-12     3  -74.4  157.  163.
#> # ℹ 3 more variables: deviance <dbl>, df.residual <int>, nobs <int>
augment(mod)
#> # A tibble: 32 × 6
#>    .rownames           mpg    wt  qsec .fitted  .resid
#>    <chr>             <dbl> <dbl> <dbl>   <dbl>   <dbl>
#>  1 Mazda RX4          21    2.62  16.5    21.8 -0.815 
#>  2 Mazda RX4 Wag      21    2.88  17.0    21.0 -0.0482
#>  3 Datsun 710         22.8  2.32  18.6    25.3 -2.53  
#>  4 Hornet 4 Drive     21.4  3.22  19.4    21.6 -0.181 
#>  5 Hornet Sportabout  18.7  3.44  17.0    18.2  0.504 
#>  6 Valiant            18.1  3.46  20.2    21.1 -2.97  
#>  7 Duster 360         14.3  3.57  15.8    16.4 -2.14  
#>  8 Merc 240D          24.4  3.19  20      22.2  2.17  
#>  9 Merc 230           22.8  3.15  22.9    25.1 -2.32  
#> 10 Merc 280           19.2  3.44  18.3    19.4 -0.185 
#> # ℹ 22 more rows