confint.fuzzydid

Extract stored percentile bootstrap confidence intervals.

Usage

# S3 method for class 'fuzzydid'
confint(object, parm, level = 0.95, ...)

Arguments

object

A fuzzydid object.

parm

Optional parameter subset.

level

Confidence level. Only 0.95 is currently stored.

...

Unused.

Value

A matrix with lower and upper confidence limits.

Examples

df <- expand.grid(i = seq_len(20), g = 0:1, t = 0:1)
df$d <- as.integer(df$i <= c(4, 8, 6, 16)[1 + df$t + 2 * df$g])
df$y <- 1 + 0.5 * df$g + 0.4 * df$t + 2 * df$d + sin(df$i / 7)

fit <- fuzzydid(df, y ~ d, group = "g", time = "t", did = TRUE, nose = TRUE)
confint(fit)
#>       2.5 % 97.5 %
#> W_DID    NA     NA