更改 R 中函数的默认参数
change the default arguments of a function in R
我正在跟进 。我想知道是否有办法在 library(effects)
生成的图中将参数 rug
的默认值设置为 FALSE
并将参数 multiline
的默认值设置为 TRUE
作为,例如,代码如下所示?
library(effects)
m <- lm(Fertility ~ Examination*Education, data = swiss)
plot(allEffects(m), rug = FALSE, multiline = TRUE) # By default, change `rug = FALSE`
# `multiline = TRUE `
注意:以下建议是指在函数中更改默认值的一般情况。
是的,乱用默认参数是可能的。一种方法是修改函数的 formals
,在本例中为
formals(effects:::plot.eff)$rug <- FALSE
formals(effects:::plot.eff)$multiline <- TRUE
另一种可能性是使用 default
包,例如
default::default(effects:::plot.eff) <- list(rug = FALSE,
multiline = TRUE)
引用包说明,
A simple syntax to change the default values for function arguments, whether they are in packages or defined locally.
关于包的更多信息,您可以查看CRAN页面。
我认为如果您只是想将这两个选项添加到您引用的@MrFlick 的回答中,您可以执行以下操作:
plot.efflist <- function (x, selection, rows, cols, graphics = TRUE,
lattice, rug = FALSE, multiline = TRUE, ...)
{
lattice <- if (missing(lattice))
list()
else lattice
if (!missing(selection)) {
if (is.character(selection))
selection <- gsub(" ", "", selection)
pp <- plot(x[[selection]], lattice = lattice, rug = rug, multiline=multiline, ...)
pp$x.scales$tck=c(1,0)
pp$y.scales$tck=c(1,0)
return(pp)
}
effects <- gsub(":", "*", names(x))
neffects <- length(x)
mfrow <- mfrow(neffects)
if (missing(rows) || missing(cols)) {
rows <- mfrow[1]
cols <- mfrow[2]
}
for (i in 1:rows) {
for (j in 1:cols) {
if ((i - 1) * cols + j > neffects)
break
more <- !((i - 1) * cols + j == neffects)
lattice[["array"]] <- list(row = i, col = j,
nrow = rows, ncol = cols, more = more)
pp <- plot(x[[(i - 1) * cols + j]], lattice = lattice, rug=rug, multiline=multiline,
...)
# hack to turn off opposite side tick marks
pp$x.scales$tck=c(1,0)
pp$y.scales$tck=c(1,0)
print(pp)
}
}
}
environment(plot.efflist) <- asNamespace("effects")
library(effects)
m <- lm(Fertility ~ ., data = swiss)
plot(allEffects(m), rug = FALSE)
我正在跟进 library(effects)
生成的图中将参数 rug
的默认值设置为 FALSE
并将参数 multiline
的默认值设置为 TRUE
作为,例如,代码如下所示?
library(effects)
m <- lm(Fertility ~ Examination*Education, data = swiss)
plot(allEffects(m), rug = FALSE, multiline = TRUE) # By default, change `rug = FALSE`
# `multiline = TRUE `
注意:以下建议是指在函数中更改默认值的一般情况。
是的,乱用默认参数是可能的。一种方法是修改函数的 formals
,在本例中为
formals(effects:::plot.eff)$rug <- FALSE
formals(effects:::plot.eff)$multiline <- TRUE
另一种可能性是使用 default
包,例如
default::default(effects:::plot.eff) <- list(rug = FALSE,
multiline = TRUE)
引用包说明,
A simple syntax to change the default values for function arguments, whether they are in packages or defined locally.
关于包的更多信息,您可以查看CRAN页面。
我认为如果您只是想将这两个选项添加到您引用的@MrFlick 的回答中,您可以执行以下操作:
plot.efflist <- function (x, selection, rows, cols, graphics = TRUE,
lattice, rug = FALSE, multiline = TRUE, ...)
{
lattice <- if (missing(lattice))
list()
else lattice
if (!missing(selection)) {
if (is.character(selection))
selection <- gsub(" ", "", selection)
pp <- plot(x[[selection]], lattice = lattice, rug = rug, multiline=multiline, ...)
pp$x.scales$tck=c(1,0)
pp$y.scales$tck=c(1,0)
return(pp)
}
effects <- gsub(":", "*", names(x))
neffects <- length(x)
mfrow <- mfrow(neffects)
if (missing(rows) || missing(cols)) {
rows <- mfrow[1]
cols <- mfrow[2]
}
for (i in 1:rows) {
for (j in 1:cols) {
if ((i - 1) * cols + j > neffects)
break
more <- !((i - 1) * cols + j == neffects)
lattice[["array"]] <- list(row = i, col = j,
nrow = rows, ncol = cols, more = more)
pp <- plot(x[[(i - 1) * cols + j]], lattice = lattice, rug=rug, multiline=multiline,
...)
# hack to turn off opposite side tick marks
pp$x.scales$tck=c(1,0)
pp$y.scales$tck=c(1,0)
print(pp)
}
}
}
environment(plot.efflist) <- asNamespace("effects")
library(effects)
m <- lm(Fertility ~ ., data = swiss)
plot(allEffects(m), rug = FALSE)