用于R的堆栈函数（光栅库）的参数

我正在尝试从R中的光栅库中使用stack函数创建RasterStack对象

library(raster)

但是我对函数中使用的参数有疑问。让我展示一下我在做什么：

###set working directory
setwd("myworkingdirectory")

###Upload variables
v1 <- raster("variable1.tif")
v2 <- raster("variable2.tif")
v3 <- raster("variable3.tif")
v4 <- raster("variable4.tif")

我试图编写类似于以下代码的代码，希望能让流程正常工作，但事实并非如此：

var.stacked <- stack(num.vars)

Error in .local(.Object, ...) : 
  `myworkingdirectory\e1' does not exist in the file system,
and is not recognised as a supported dataset name.


Error in .rasterObjectFromFile(x, band = band, objecttype = "RasterLayer",  : 
  Cannot create a RasterLayer object from this file. (file does not exist)

---

var.stacked因为您正在将字符向量传递给
stack
，然后将其解释为当前工作目录中的文件名。相反，如果您已经在R中创建了光栅对象，则可以执行此操作

stack( mget( num.vars , env = .GlobalEnv ) )

mget
获取光栅对象名称的字符向量并返回光栅对象列表

堆叠
然后将列表中的光栅堆叠成一个
堆叠
，太棒了！非常感谢你，西蒙诺101@很高兴为您服务！
var.stacked <- stack(num.vars)

Error in .local(.Object, ...) : 
  `myworkingdirectory\e1' does not exist in the file system,
and is not recognised as a supported dataset name.


Error in .rasterObjectFromFile(x, band = band, objecttype = "RasterLayer",  : 
  Cannot create a RasterLayer object from this file. (file does not exist)

stack( mget( num.vars , env = .GlobalEnv ) )