如何在R中的单个字符串中打印矢量的所有元素？

Question

Sometimes I want to print all of the elements in a vector in a single string, but it still prints the elements separately:

notes <- c("do","re","mi")
print(paste("The first three notes are: ", notes,sep="\t"))

Which gives:

[1] "The first three notes are: \tdo" "The first three notes are: \tre"
[3] "The first three notes are: \tmi"

What I really want is:

The first three notes are:      do      re      mi

Answer 1

The simplest way might be to combine your message and data using one c function:

paste(c("The first three notes are: ", notes), collapse=" ")
### [1] "The first three notes are:  do re mi"

Answer 2

The cat function both con cat enates the elements of the vector and prints them:

cat("The first three notes are: ", notes,"\n",sep="\t")

Which gives:

The first three notes are:      do      re      mi

The sep argument allows you to specific a separating character (eg here \\t for tab). Also, Adding a newline character (ie \\n ) at the end is also recommended if you have any other output or a command prompt afterwards.