如何在R中创建具有不同数字的字符串序列

Question

I just cant figure it out how to create a vector in which the strings are constant but the numbers are not. For example:

c("raster[1]","raster[2]","raster[3]")

I'd like to use something like seq(raster[1],raster[99], by=1) , but this does not work.

Thanks in advance.

Answer 1

The sprintf function should also work:

rasters <- sprintf("raster[%s]",seq(1:99))
head(rasters)
[1] "raster[1]" "raster[2]" "raster[3]" "raster[4]" "raster[5]" "raster[6]"

As suggested by Richard Scriven, %d is more efficient than %s . So, if you were working with a longer sequence, it would be more appropriate to use:

rasters <- sprintf("raster[%d]",seq(1:99))

Answer 2

We can do

paste0("raster[", 1:6, "]")
# [1] "raster[1]" "raster[2]" "raster[3]" "raster[4]" "raster[5]" "raster[6]"