Residual plots for a output model of class `waas`

and `waasb`

. Six types
of plots are produced: (1) Residuals vs fitted, (2) normal Q-Q plot for the
residuals, (3) scale-location plot (standardized residuals vs Fitted
Values), (4) standardized residuals vs Factor-levels, (5) Histogram of raw
residuals and (6) standardized residuals vs observation order. For a `waasb`

object, normal Q-Q plot for random effects may also be obtained declaring
`type = 're'`

## Usage

```
# S3 method for waasb
plot(
x,
var = 1,
type = "res",
position = "fill",
trait.levels = NULL,
percent = TRUE,
percent.digits = 2,
size.text.percent = 3.5,
rotate = FALSE,
conf = 0.95,
out = "print",
n.dodge = 1,
check.overlap = FALSE,
labels = FALSE,
plot_theme = theme_metan(),
alpha = 0.2,
fill.hist = "gray",
col.hist = "black",
col.point = "black",
col.line = "red",
col.lab.out = "red",
size.line = 0.7,
size.text = 10,
width.bar = 0.75,
size.lab.out = 2.5,
size.tex.lab = 10,
size.shape = 1.5,
bins = 30,
which = c(1:4),
ncol = NULL,
nrow = NULL,
...
)
```

## Arguments

- x
An object of class

`waasb`

.- var
The variable to plot. Defaults to

`var = 1`

the first variable of`x`

.- type
One of the

`"res"`

to plot the model residuals (default),`type = 're'`

to plot normal Q-Q plots for the random effects, or`"vcomp"`

to create a bar plot with the variance components.- position
The position adjustment when

`type = "vcomp"`

. Defaults to`"fill"`

, which shows relative proportions at each trait by stacking the bars and then standardizing each bar to have the same height. Use`position = "stack"`

to plot the phenotypic variance for each trait.- trait.levels
By default, variables are ordered in the x-axis by alphabetic order. If a plot with two variables (eg., "GY" and "PH") "PH" should appers before "GY", one can use a comma-separated vector of variable names to relevel the variable's position in the plot (eg.,

`trait.levels = "PH, GY"`

).- percent
If

`TRUE`

(default) shows the y-axis as percent and the percentage values within each bar.- percent.digits
The significant figures for the percentage values. Defaults to

`2`

.- size.text.percent
The size of the text for the percentage values. Defaults to

`3.5`

.- rotate
Logical argument. If

`rotate = TRUE`

the plot is rotated, i.e., traits in y axis and value in the x axis.- conf
Level of confidence interval to use in the Q-Q plot (0.95 by default).

- out
How the output is returned. Must be one of the 'print' (default) or 'return'.

- n.dodge
The number of rows that should be used to render the x labels. This is useful for displaying labels that would otherwise overlap.

- check.overlap
Silently remove overlapping labels, (recursively) prioritizing the first, last, and middle labels.

- labels
Logical argument. If

`TRUE`

labels the points outside confidence interval limits.- plot_theme
The graphical theme of the plot. Default is

`plot_theme = theme_metan()`

. For more details, see`ggplot2::theme()`

.- alpha
The transparency of confidence band in the Q-Q plot. Must be a number between 0 (opaque) and 1 (full transparency).

- fill.hist
The color to fill the histogram. Default is 'gray'.

- col.hist
The color of the border of the the histogram. Default is 'black'.

- col.point
The color of the points in the graphic. Default is 'black'.

- col.line
The color of the lines in the graphic. Default is 'red'.

- col.lab.out
The color of the labels for the 'outlying' points.

- size.line
The size of the line in graphic. Defaults to 0.7.

- size.text
The size for the text in the plot. Defaults to 10.

- width.bar
The width of the bars if

`type = "contribution"`

.- size.lab.out
The size of the labels for the 'outlying' points.

- size.tex.lab
The size of the text in axis text and labels.

- size.shape
The size of the shape in the plots.

- bins
The number of bins to use in the histogram. Default is 30.

- which
Which graphics should be plotted. Default is

`which = c(1:4)`

that means that the first four graphics will be plotted.- ncol, nrow
The number of columns and rows of the plot pannel. Defaults to

`NULL`

- ...
Additional arguments passed on to the function

`patchwork::wrap_plots()`

.

## Author

Tiago Olivoto tiagoolivoto@gmail.com

## Examples

```
# \donttest{
library(metan)
x <- gamem_met(data_ge,
gen = GEN,
env = ENV,
rep = REP,
resp = everything())
#> Evaluating trait GY |====================== | 50% 00:00:01
Evaluating trait HM |============================================| 100% 00:00:03
#> Method: REML/BLUP
#> Random effects: GEN, GEN:ENV
#> Fixed effects: ENV, REP(ENV)
#> Denominador DF: Satterthwaite's method
#> ---------------------------------------------------------------------------
#> P-values for Likelihood Ratio Test of the analyzed traits
#> ---------------------------------------------------------------------------
#> model GY HM
#> COMPLETE NA NA
#> GEN 1.11e-05 5.07e-03
#> GEN:ENV 2.15e-11 2.27e-15
#> ---------------------------------------------------------------------------
#> All variables with significant (p < 0.05) genotype-vs-environment interaction
plot(x)
#> `geom_smooth()` using formula = 'y ~ x'
#> `geom_smooth()` using formula = 'y ~ x'
# }
```