相关疑难解决方法(0)

当我将因子转换为数字或整数时,我得到基础级别代码,而不是值作为数字.

f <- factor(sample(runif(5), 20, replace = TRUE))
##  [1] 0.0248644019011408 0.0248644019011408 0.179684827337041 
##  [4] 0.0284090070053935 0.363644931698218  0.363644931698218 
##  [7] 0.179684827337041  0.249704354675487  0.249704354675487 
## [10] 0.0248644019011408 0.249704354675487  0.0284090070053935
## [13] 0.179684827337041  0.0248644019011408 0.179684827337041 
## [16] 0.363644931698218  0.249704354675487  0.363644931698218 
## [19] 0.179684827337041  0.0284090070053935
## 5 Levels: 0.0248644019011408 0.0284090070053935 ... 0.363644931698218

as.numeric(f)
##  [1] 1 1 3 2 5 5 3 4 4 1 4 2 3 1 3 5 4 5 3 2

as.integer(f)
##  [1] 1 1 3 2 5 …

我导入了一个测试文件并尝试制作直方图

pichman <- read.csv(file="picman.txt", header=TRUE, sep="/t")   
hist <- as.numeric(pichman$WS)    

但是,我从数据集中的值得到不同的数字.本来我以为这是因为我有文字,所以我删除了文字:

table(pichman$WS)    
ws <- pichman$WS[pichman$WS!="Down" & pichman$WS!="NoData"]    

但是,我仍然得到很高的数字,有没有人有想法？

> X864291X8X74
[1] 8.0000000000  9.0000000000  10.0000000000 6.0000000000  8.0000000000 
10 Levels: 0.0000000000 10.0000000000 12.0000000000 3.0000000000 4.0000000000 6.0000000000 ... NULL

> as.numeric(X864291X8X74)

[1] 8 9 2 6 8

我误解了什么？不应该是as.numeric 8 9 10 6 8的结果？

如何获得正确的结果？

可能的重复:
将因子转换为整数
R - 如何在R中将因子转换为整数\numeric而不会丢失信息

我读过一个文本文件,其中一些带有实数的列被读作数据帧的因子.如何将factoe列转换为数字列

给定一个shapefile,我如何塑造和使用数据文件,以便能够使用与shapefile中的形状区域对应的标识符来绘制专题图？

#Download English Government Office Network Regions (GOR) from:
#http://www.sharegeo.ac.uk/handle/10672/50
tmp_dir = tempdir()
url_data = "http://www.sharegeo.ac.uk/download/10672/50/English%20Government%20Office%20Network%20Regions%20(GOR).zip"
zip_file = sprintf("%s/shpfile.zip", tmp_dir)
download.file(url_data, zip_file)
unzip(zip_file, exdir = tmp_dir)

library(maptools)

#Load in the data file (could this be done from the downloaded zip file directly?
gor=readShapeSpatial(sprintf('%s/Regions.shp', tmp_dir))

#I can plot the shapefile okay...
plot(gor)

#and I can use these commands to get a feel for the data...
summary(gor)
attributes(gor@data)
gor@data$NAME
#[1] North East               North West              
#[3] Greater London Authority West Midlands           
#[5] Yorkshire …

我有一个R数据帧,其中一列是其级别具有隐式排序的因子.如何以下列方式将因子级别转换为特定整数:

• "非常不同意" - > 1
• "有点不同意" - > 2
• "中立" - > 3
• "有点同意" - > 4
• "非常同意" - > 5

例如,这是我的数据框:

agree <- c("Strongly agree", "Somewhat disagree", "Somewhat agree",
           "Neutral", "Strongly agree", "Strongly disagree", "Neutral")
age <- c(41, 35, 29, 42, 31, 22, 58)

df <- data.frame(age, agree)
df
#   age             agree
# 1  41    Strongly agree
# 2  35 Somewhat disagree
# 3  29    Somewhat agree
# 4  42           Neutral
# 5  31    Strongly …