Nothing

```
library(zenplots)
### Generate some data #########################################################
n <- 1000 # sample size
d <- 20 # dimension
set.seed(271) # set seed (for reproducibility)
x <- matrix(rnorm(n*d), ncol = d) # i.i.d. N(0,1) data
### Understanding the layout of zenplots #######################################
## Auxiliary function
correctly_fails <- function(x)
is(tryCatch(x, error = function(e) e), "simpleError")
## Loop over packages
for(pkg in c("graphics", "grid")) {
## Call zenplot() in various cases
## Zero 2d plots (1st plot on the path)
stopifnot(correctly_fails(zenplot(x[,1], n2dcols = 0, pkg = pkg)))
zenplot(x[,1], n2dcols = 1, pkg = pkg) # 1d
stopifnot(correctly_fails(zenplot(x[,1], n2dcols = 1, last1d = FALSE,
pkg = pkg))) # 1d
stopifnot(correctly_fails(zenplot(x[,1], n2dcols = 1, first1d = FALSE,
last1d = FALSE, pkg = pkg))) # 1d
## One 2d plot (2nd/3rd plot on the path)
zenplot(x[,1:2], n2dcols = 1, last1d = FALSE, pkg = pkg) # 1d, 2d
zenplot(x[,1:2], n2dcols = 1, first1d = FALSE, last1d = FALSE, pkg = pkg) # 1d, 2d
zenplot(x[,1:2], n2dcols = 1, pkg = pkg) # 1d, 2d, 1d
## Note:
## - The size of the plotted points for 'grid' correspond to roughly
## 1/1.6 times the size for 'graphics'.
## - To (always) get the plot symbol/text size right would depend on both the
## number of rows and columns of (2d) plots (and is omitted here; manually
## fine-tune these sizes if required)
## Two 2d plots (4th/5th plot on the path)
zenplot(x[,1:3], n2dcols = 2, last1d = FALSE, pkg = pkg) # 1d, 2d, 1d, 2d
stopifnot(correctly_fails(zenplot(x[,1:3], n2dcols = 1, pkg = pkg))) # 1d, 2d, 1d, 2d, 1d
stopifnot(correctly_fails(zenplot(x[,1:3], n2dcols = 1, method = "double.zigzag", pkg = pkg))) # 1d, 2d, 1d, 2d, 1d
stopifnot(correctly_fails(zenplot(x[,1:3], n2dcols = 1, method = "single.zigzag", pkg = pkg))) # 1d, 2d, 1d, 2d, 1d
zenplot(x[,1:3], n2dcols = 2, pkg = pkg) # 1d, 2d, 1d, 2d, 1d
zenplot(x[,1:3], n2dcols = 2, method = "double.zigzag", pkg = pkg) # 1d, 2d, 1d, 2d, 1d
zenplot(x[,1:3], n2dcols = 2, method = "single.zigzag", pkg = pkg) # 1d, 2d, 1d, 2d, 1d
## Three 2d plots (6th/7th plot on the path)
zenplot(x[,1:4], n2dcols = 2, first1d = FALSE, pkg = pkg) # 2d, 1d, 2d, 1d, 2d, 1d
zenplot(x[,1:4], n2dcols = 2, last1d = FALSE, pkg = pkg) # 1d, 2d, 1d, 2d, 1d, 2d
zenplot(x[,1:4], n2dcols = 2, first1d = FALSE, last1d = FALSE, pkg = pkg) # 2d, 1d, 2d, 1d, 2d
zenplot(x[,1:4], n2dcols = 2, pkg = pkg) # 1d, 2d, 1d, 2d, 1d, 2d, 1d
zenplot(x[,1:4], n2dcols = 2, method = "double.zigzag", pkg = pkg) # 1d, 2d, 1d, 2d, 1d, 2d, 1d
zenplot(x[,1:4], n2dcols = 2, method = "single.zigzag", pkg = pkg) # 1d, 2d, 1d, 2d, 1d, 2d, 1d
## Four 2d plots (8th/9th plot on the path)
zenplot(x[,1:5], n2dcols = 2, last1d = FALSE, pkg = pkg) # 1d, 2d, 1d, 2d, 1d, 2d, 1d, 2d
zenplot(x[,1:5], n2dcols = 2, pkg = pkg) # 1d, 2d, 1d, 2d, 1d, 2d, 1d, 2d, 1d
zenplot(x[,1:5], n2dcols = 3, pkg = pkg) # 1d, 2d, 1d, 2d, 1d, 2d, 1d, 2d, 1d
zenplot(x[,1:5], n2dcols = 3, method = "double.zigzag", pkg = pkg) # 1d, 2d, 1d, 2d, 1d, 2d, 1d, 2d, 1d
zenplot(x[,1:5], n2dcols = 3, method = "single.zigzag", pkg = pkg) # 1d, 2d, 1d, 2d, 1d, 2d, 1d, 2d, 1d
## Large sub-data sets
zenplot(x[,1:18], n2dcols = 5, pkg = pkg)
zenplot(x[,1:18], n2dcols = 5, method = "double.zigzag", pkg = pkg)
zenplot(x[,1:18], n2dcols = 5, method = "single.zigzag", pkg = pkg)
zenplot(x[,1:19], n2dcols = 5, pkg = pkg)
## The full data with different n2dcols
zenplot(x, n2dcols = 4, pkg = pkg)
zenplot(x, n2dcols = 5, pkg = pkg)
zenplot(x, n2dcols = 6, pkg = pkg)
zenplot(x, n2dcols = 7, pkg = pkg)
zenplot(x, n2dcols = 8, pkg = pkg)
zenplot(x, n2dcols = 9, pkg = pkg)
zenplot(x, n2dcols = 10, pkg = pkg)
zenplot(x, n2dcols = 11, pkg = pkg)
}
### Examples with predefined plot1d() or plot2d() ##############################
zenplot(x, plot1d = "label", plot2d = "rect")
zenplot(x, plot1d = "label", plot2d = "rect", pkg = "grid")
zenplot(x, plot1d = "arrow", plot2d = "rect")
zenplot(x, plot1d = "arrow", plot2d = "rect", pkg = "grid")
zenplot(x, plot1d = "arrow", plot2d = "arrow")
zenplot(x, plot1d = "arrow", plot2d = "arrow", pkg = "grid")
zenplot(x, plot1d = NULL) # omitting the 1d plots
zenplot(x, plot1d = NULL, pkg = "grid")
zenplot(x, plot2d = NULL) # omitting the 2d plots
zenplot(x, plot2d = NULL, pkg = "grid")
### Iterate over all predefined plot1d() #######################################
for(p1d in eval(formals(zenplot)$plot1d)) {
zenplot(x, plot1d = p1d) # with graphics
zenplot(x, plot1d = p1d, pkg = "grid") # with grid
}
### Some missing data ##########################################################
z <- x
z[seq_len(n-10), 5] <- NA # all NA except 10 points
zenplot(z, plot1d = "rug")
zenplot(z, plot1d = "hist")
zenplot(z, plot1d = "density")
z[, 6] <- NA # all NA
zenplot(z, plot1d = "rug")
zenplot(z, plot1d = "hist")
zenplot(z, plot1d = "density")
```

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