R语言打印到屏幕或文件 – cat()函数

R语言中的 cat() 函数用于打印到屏幕或文件中。

语法：

cat(…, file = “”, sep = “”, fill = FALSE, labels = NULL, append = FALSE)

参数：

… : 原子向量、名称、NULL和没有输出的对象

file: 将进行打印的文件

sep: 指定的分隔符

fill: 如果fill=TRUE，将打印一个新行，否则不

labels: 指定标签

例1：

# R program to illustrate
# cat function
 
# Creating some string and print it
x <- "GeeksforGeeks\n"
y <- "Geeks\n"
 
# Calling cat() function
cat(x)
cat(y)
 
# Creating a sequence from 1 to 9
x <- 1:9
 
# Calling cat() function
cat(x, sep =" + ")
cat("\n")
cat(x, sep =" / ")

输出：

GeeksforGeeks
Geeks
1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9
1 / 2 / 3 / 4 / 5 / 6 / 7 / 8 / 9

例2：

# R program to illustrate
# cat function
 
# Creating a sequence from 1 to 9
x <- 1:9
 
# Calling cat() function
 
# fill value TRUE will print
# a new line
cat(x, sep =" + ", fill = TRUE)
cat(x, sep =" / ", fill = FALSE)
 
# Printing new line
cat("\n")
 
# Each number from 1 to 9 will be
# assigned with alphabets a to i
cat(x, fill = 2, labels = paste("(", letters[1:9], "):"))

输出：

1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9
1 / 2 / 3 / 4 / 5 / 6 / 7 / 8 / 9
( a ): 1 
( b ): 2 
( c ): 3 
( d ): 4 
( e ): 5 
( f ): 6 
( g ): 7 
( h ): 8 
( i ): 9