r中的extactExtractr，错误：[名称＆lt; - ]名称的数量不正确

发布于 2025-02-10 04:15:51 字数 526 浏览 3 评论 0原文

使用 eckectextractr package（cran link）它一直在起作用：我有一个耙子堆栈（s）并用这样的形状文件（Inv）剪切，

df1 <- exact_extract(s, INV, fun = c("mean", "min", "max", "median", "variance"), append_cols = c("FLIK"))

但是从今天开始，我就会有一个错误消息

错误：[名称＆lt; - ]名称的数量不正确

当我列出名称名称>名称>或名称>名称（Inv）的名称时，名称的数量不正确。我看不到任何错误。

我看不到任何隐藏的名字吗？有名字的障碍吗？

原文

Used exactextractr package (CRAN link) already and it always worked : I have a raster stack (s) and cut out with a shape-file (INV) like this

df1 <- exact_extract(s, INV, fun = c("mean", "min", "max", "median", "variance"), append_cols = c("FLIK"))

But as from today I have an error message constantly like

Error: [names<-] incorrect number of names

When I list names either of names(s) or names(INV) I cannot see any mistake.

Are there any hidden names I cannot see ? Is there alimit of names ?

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趴在窗边数星星i 2025-02-17 04:15:51

我今天遇到了同样的问题，我设法以简单的方式修复了我的代码。当我读取栅格文件（.nc）时，我从raster库中使用了stack函数。此代码Ruturn是一个栅格扇形对象。下面的代码给了我与您提到的相同的错误。

library(raster)
library(sf)
library(exactextractr)

# Reading shapefile data
shapefile<- sf::st_read("PATH_TO_SHAPEFILE")

# Reading raster data
raster <- raster::stack("PATH_TO_RASTER")

# Using exact_extract function from exactextractr package
df <- exact_extract(raster , shapefile, 'mean')

我设法通过使用brick函数（从同一库中）返回rasterbrick来解决此问题。这样，我可以在没有错误的情况下运行代码，如下所示：

library(raster)
library(sf)
library(exactextractr)

# Reading shapefile data
shapefile<- sf::st_read("PATH_TO_SHAPEFILE")

# Reading raster data
raster <- raster::brick("PATH_TO_RASTER")

# Using exact_extract function from exactextractr package
df <- exact_extract(raster , shapefile, 'mean')

我不完全知道这里发生了什么，因为我过去曾经使用stack函数，这根本没有问题。由于某种原因，使用Brick这次修复了我的代码。我希望这可以帮助您。

I had the same problem today and I manage to fix my code in a simple way. When I read the raster file (.nc), I used the stack function from raster library. This code ruturns a RasterStack object. The code below gave me the same error as you mentioned.

library(raster)
library(sf)
library(exactextractr)

# Reading shapefile data
shapefile<- sf::st_read("PATH_TO_SHAPEFILE")

# Reading raster data
raster <- raster::stack("PATH_TO_RASTER")

# Using exact_extract function from exactextractr package
df <- exact_extract(raster , shapefile, 'mean')

I managed to fix that by using the brick function, from the same library, that returns a RasterBrick. That way, I could run my code without errors, as following:

library(raster)
library(sf)
library(exactextractr)

# Reading shapefile data
shapefile<- sf::st_read("PATH_TO_SHAPEFILE")

# Reading raster data
raster <- raster::brick("PATH_TO_RASTER")

# Using exact_extract function from exactextractr package
df <- exact_extract(raster , shapefile, 'mean')

I don't exactly knows what is happening here, because I have used the stack function in the past with no problem at all. For some reason, using brick fixed my code this time. I hope this can help you.

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