A print facility for the VCOVs from fixest objects.

Prints a VCOV obtained from fixest, on top of a regular matrix display, its main use is to: i) report how the VCOV was computed, and ii) hide the information on attributes

Usage

# S3 method for class 'fixest_vcov'
print(x, ...)

Arguments

x

A fixest_vcov object, obtained from vcov.fixest.

...

Not used.

Value

This function does not return anything.

Author

Laurent Berge

Examples

# 1) fixest estimation
est = feols(Petal.Length ~ Sepal.Width, iris)

# 2) print the VCOV; this method hides the attributes
vcov(est)
#> VCOV type:  IID 
#>             (Intercept) Sepal.Width
#> (Intercept)   0.8628950 -0.27665242
#> Sepal.Width  -0.2766524  0.09048815

# 3) showing the attributes if needed
attributes(vcov(est))
#> $dim
#> [1] 2 2
#> 
#> $dimnames
#> $dimnames[[1]]
#> [1] "(Intercept)" "Sepal.Width"
#> 
#> $dimnames[[2]]
#> [1] "(Intercept)" "Sepal.Width"
#> 
#> 
#> $df.t
#> [1] 148
#> 
#> $vcov_type
#> [1] "IID"
#> 
#> $ssc
#> Small sample correction for IID VCOV:
#> K.adj = TRUE, K.fixef = "full", K.exact = FALSE
#> 
#> $df.K
#> [1] 2
#> 
#> $class
#> [1] "fixest_vcov"
#>