## ----setup, include=FALSE-----------------------------------------------------
if (!requireNamespace("rmarkdown", quietly = TRUE)) {
  warning(call. = FALSE, "These vignettes assume rmarkdown.  This was not found.")
  knitr::knit_exit()
}
knitr::opts_chunk$set(echo = TRUE, snapshot = FALSE, screenshot.force = FALSE)
library(rgl)
options(rgl.useNULL = TRUE)
setupKnitr(autoprint = TRUE)

## ----eval=FALSE---------------------------------------------------------------
# setupKnitr(autoprint = TRUE)

## -----------------------------------------------------------------------------
# Show regression plane with z as dependent variable
library(rgl)
open3d()
x <- rnorm(100)
y <- rnorm(100)
z <- 0.2*x - 0.3*y + rnorm(100, sd = 0.3)
fit <- lm(z ~ x + y)

plot3d(x, y, z, type = "s", col = "red", size = 1)

# No plot here, because of the planes3d() call below

coefs <- coef(fit)
a <- coefs["x"]
b <- coefs["y"]
c <- -1
d <- coefs["(Intercept)"]
planes3d(a, b, c, d, alpha = 0.5)