如何在R中将一个数据帧转换为另一个数据帧?
我已经下载了txt。肯尼思R.法兰西图书馆的文件,可通过以下链接找到 我需要使用这些所谓的SIC代码,根据行业因素将我的样本划分为不同的投资组合。下载的文件如下所示:如何在R中将一个数据帧转换为另一个数据帧?,r,split,dataframe,R,Split,Dataframe,我已经下载了txt。肯尼思R.法兰西图书馆的文件,可通过以下链接找到 我需要使用这些所谓的SIC代码,根据行业因素将我的样本划分为不同的投资组合。下载的文件如下所示: 1 Food 0100-0199 Agric production - crops 0200-0299 Agric production - livestock 0700-0799 Agricultural services 0900-0999 Fishing, hu
1 Food
0100-0199 Agric production - crops
0200-0299 Agric production - livestock
0700-0799 Agricultural services
0900-0999 Fishing, hunting & trapping
2000-2009 Food and kindred products
2010-2019 Meat products
2020-2029 Dairy products
2030-2039 Canned-preserved fruits-vegs
2040-2046 Flour and other grain mill products
2047-2047 Dog and cat food
2048-2048 Prepared feeds for animals
2050-2059 Bakery products
2060-2063 Sugar and confectionery products
2064-2068 Candy and other confectionery
2070-2079 Fats and oils
2080-2080 Beverages
2082-2082 Malt beverages
2083-2083 Malt
2084-2084 Wine
2085-2085 Distilled and blended liquors
2086-2086 Bottled-canned soft drinks
2087-2087 Flavoring syrup
2090-2092 Misc food preps
2095-2095 Roasted coffee
2096-2096 Potato chips
2097-2097 Manufactured ice
2098-2099 Misc food preparations
5140-5149 Wholesale - groceries & related prods
5150-5159 Wholesale - farm products
5180-5182 Wholesale - beer, wine
5191-5191 Wholesale - farm supplies
2 Mines
1000-1009 Metal mining
1010-1019 Iron ores
1020-1029 Copper ores
1030-1039 Lead and zinc ores
1040-1049 Gold & silver ores
1060-1069 Ferroalloy ores
1080-1089 Mining services
1090-1099 Misc metal ores
1200-1299 Bituminous coal
1400-1499 Mining and quarrying non-metalic minerals
5050-5052 Wholesale - metals and minerals
3 Oil
1300-1300 Oil and gas extraction
1310-1319 Crude petroleum & natural gas
1320-1329 Natural gas liquids
1380-1380 Oil and gas field services
1381-1381 Drilling oil & gas wells
1382-1382 Oil-gas field exploration
1389-1389 Oil and gas field services
2900-2912 Petroleum refining
5170-5172 Wholesale - petroleum and petro prods
4 Clths
2200-2269 Textile mill products
2270-2279 Floor covering mills
2280-2284 Yarn and thread mills
2290-2295 Misc textile goods
2296-2296 Tire cord and fabric
2297-2297 Nonwoven fabrics
2298-2298 Cordage and twine
2299-2299 Misc textile products
2300-2390 Apparel and other finished products
2391-2392 Curtains, home furnishings
2393-2395 Textile bags, canvas products
2396-2396 Auto trim
2397-2399 Misc textile products
3020-3021 Rubber and plastics footwear
3100-3111 Leather tanning and finishing
3130-3131 Boot, shoe cut stock, findings
3140-3149 Footware except rubber
3150-3151 Leather gloves and mittens
3963-3965 Fasteners, buttons, needles, pins
5130-5139 Wholesale - apparel
我想做的事情是创建数据框架,其中第一列给出行业名称(例如,食品、采矿和矿产等),第二列给出与该行业相关的所有SIC代码(标准行业代码)(因为大多数SIC代码都是通过as 5130-5139的方式给出的,这使得执行起来有点困难)
这个数据框架将使我的分析更容易实现
任何建议都将非常值得注意。这将产生一个2列数据框
df.new
,其中包含第2列中逗号分隔的代码:
df <- read.fwf("Siccodes48.txt", widths=c(3, 7, 60), stringsAsFactors=FALSE)
df <- df[!is.na(df$V3), ]
library(zoo)
df$V1 <- na.locf(df$V1)
l <- split(df, df$V1)
l <- setNames(lapply(l, function(x) {
m <- regexec("([0-9]{4})-([0-9]{4}) .*", x$V3[-1]) # omit headline
r <- regmatches(x$V3[-1], m)
fromTo <- t(sapply(r, "[", 2:3))
paste(sprintf("%04d", unlist(mapply(":", fromTo[, 1], fromTo[, 2]))), collapse=", ")
}), sapply(l, "[", 1, 3))
df.new <- data.frame(name=names(l), sic=unlist(l))
df这将生成一个2列数据帧df.new
,其中包含第2列中逗号分隔的代码:
df <- read.fwf("Siccodes48.txt", widths=c(3, 7, 60), stringsAsFactors=FALSE)
df <- df[!is.na(df$V3), ]
library(zoo)
df$V1 <- na.locf(df$V1)
l <- split(df, df$V1)
l <- setNames(lapply(l, function(x) {
m <- regexec("([0-9]{4})-([0-9]{4}) .*", x$V3[-1]) # omit headline
r <- regmatches(x$V3[-1], m)
fromTo <- t(sapply(r, "[", 2:3))
paste(sprintf("%04d", unlist(mapply(":", fromTo[, 1], fromTo[, 2]))), collapse=", ")
}), sapply(l, "[", 1, 3))
df.new <- data.frame(name=names(l), sic=unlist(l))
df这将生成一个2列数据帧df.new
,其中包含第2列中逗号分隔的代码:
df <- read.fwf("Siccodes48.txt", widths=c(3, 7, 60), stringsAsFactors=FALSE)
df <- df[!is.na(df$V3), ]
library(zoo)
df$V1 <- na.locf(df$V1)
l <- split(df, df$V1)
l <- setNames(lapply(l, function(x) {
m <- regexec("([0-9]{4})-([0-9]{4}) .*", x$V3[-1]) # omit headline
r <- regmatches(x$V3[-1], m)
fromTo <- t(sapply(r, "[", 2:3))
paste(sprintf("%04d", unlist(mapply(":", fromTo[, 1], fromTo[, 2]))), collapse=", ")
}), sapply(l, "[", 1, 3))
df.new <- data.frame(name=names(l), sic=unlist(l))
df这将生成一个2列数据帧df.new
,其中包含第2列中逗号分隔的代码:
df <- read.fwf("Siccodes48.txt", widths=c(3, 7, 60), stringsAsFactors=FALSE)
df <- df[!is.na(df$V3), ]
library(zoo)
df$V1 <- na.locf(df$V1)
l <- split(df, df$V1)
l <- setNames(lapply(l, function(x) {
m <- regexec("([0-9]{4})-([0-9]{4}) .*", x$V3[-1]) # omit headline
r <- regmatches(x$V3[-1], m)
fromTo <- t(sapply(r, "[", 2:3))
paste(sprintf("%04d", unlist(mapply(":", fromTo[, 1], fromTo[, 2]))), collapse=", ")
}), sapply(l, "[", 1, 3))
df.new <- data.frame(name=names(l), sic=unlist(l))
df这个怎么样
df<-readLines("Siccodes48.txt")
df<-data.frame(t=df[df!=""]) # delete blanks and make data frame
df$prefix<-c(substr(df$t,1,10)) # break out the prefix (first 10 char)
df$index<-cumsum(df$prefix!=" ") # make an index
ind<-df[df$prefix!=" ",] # make an index table
ind$desc<-substring(ind$t,11,100) # parse descriptions
final<-merge(ind[,c("index","desc")], # merge the index table
df[df$prefix==" ",c("index","t")], # with all non-title rows of the list
by="index") # by index
head(final,10)
index desc t
1 1 Agriculture 0100-0199 Agric production - crops
2 1 Agriculture 0200-0299 Agric production - livestock
3 1 Agriculture 0700-0799 Agricultural services
4 1 Agriculture 0910-0919 Commercial fishing
5 1 Agriculture 2048-2048 Prepared feeds for animals
6 2 Food Products 2000-2009 Food and kindred products
7 2 Food Products 2010-2019 Meat products
8 2 Food Products 2020-2029 Dairy products
9 2 Food Products 2030-2039 Canned-preserved fruits-vegs
10 2 Food Products 2040-2046 Flour and other grain mill products
df这个怎么样
df<-readLines("Siccodes48.txt")
df<-data.frame(t=df[df!=""]) # delete blanks and make data frame
df$prefix<-c(substr(df$t,1,10)) # break out the prefix (first 10 char)
df$index<-cumsum(df$prefix!=" ") # make an index
ind<-df[df$prefix!=" ",] # make an index table
ind$desc<-substring(ind$t,11,100) # parse descriptions
final<-merge(ind[,c("index","desc")], # merge the index table
df[df$prefix==" ",c("index","t")], # with all non-title rows of the list
by="index") # by index
head(final,10)
index desc t
1 1 Agriculture 0100-0199 Agric production - crops
2 1 Agriculture 0200-0299 Agric production - livestock
3 1 Agriculture 0700-0799 Agricultural services
4 1 Agriculture 0910-0919 Commercial fishing
5 1 Agriculture 2048-2048 Prepared feeds for animals
6 2 Food Products 2000-2009 Food and kindred products
7 2 Food Products 2010-2019 Meat products
8 2 Food Products 2020-2029 Dairy products
9 2 Food Products 2030-2039 Canned-preserved fruits-vegs
10 2 Food Products 2040-2046 Flour and other grain mill products
df这个怎么样
df<-readLines("Siccodes48.txt")
df<-data.frame(t=df[df!=""]) # delete blanks and make data frame
df$prefix<-c(substr(df$t,1,10)) # break out the prefix (first 10 char)
df$index<-cumsum(df$prefix!=" ") # make an index
ind<-df[df$prefix!=" ",] # make an index table
ind$desc<-substring(ind$t,11,100) # parse descriptions
final<-merge(ind[,c("index","desc")], # merge the index table
df[df$prefix==" ",c("index","t")], # with all non-title rows of the list
by="index") # by index
head(final,10)
index desc t
1 1 Agriculture 0100-0199 Agric production - crops
2 1 Agriculture 0200-0299 Agric production - livestock
3 1 Agriculture 0700-0799 Agricultural services
4 1 Agriculture 0910-0919 Commercial fishing
5 1 Agriculture 2048-2048 Prepared feeds for animals
6 2 Food Products 2000-2009 Food and kindred products
7 2 Food Products 2010-2019 Meat products
8 2 Food Products 2020-2029 Dairy products
9 2 Food Products 2030-2039 Canned-preserved fruits-vegs
10 2 Food Products 2040-2046 Flour and other grain mill products
df这个怎么样
df<-readLines("Siccodes48.txt")
df<-data.frame(t=df[df!=""]) # delete blanks and make data frame
df$prefix<-c(substr(df$t,1,10)) # break out the prefix (first 10 char)
df$index<-cumsum(df$prefix!=" ") # make an index
ind<-df[df$prefix!=" ",] # make an index table
ind$desc<-substring(ind$t,11,100) # parse descriptions
final<-merge(ind[,c("index","desc")], # merge the index table
df[df$prefix==" ",c("index","t")], # with all non-title rows of the list
by="index") # by index
head(final,10)
index desc t
1 1 Agriculture 0100-0199 Agric production - crops
2 1 Agriculture 0200-0299 Agric production - livestock
3 1 Agriculture 0700-0799 Agricultural services
4 1 Agriculture 0910-0919 Commercial fishing
5 1 Agriculture 2048-2048 Prepared feeds for animals
6 2 Food Products 2000-2009 Food and kindred products
7 2 Food Products 2010-2019 Meat products
8 2 Food Products 2020-2029 Dairy products
9 2 Food Products 2030-2039 Canned-preserved fruits-vegs
10 2 Food Products 2040-2046 Flour and other grain mill products
<代码> DFI将考虑一个真实的数据预处理工具,如谷歌精炼(离线和免费)。R并不真正适合这种任务,即使你可以用R来完成,但要付出更多的痛苦。我认为使用其他程序来处理这个问题会更好,因为你的数据看起来不像一个数据帧(中间有“4个Clth”之类的东西)。这不是一种非常有效的方法,但您可以手动执行。我可以看到,所有的SIC代码都是xxxx xxxx的形式,后跟一个空格。因此,如果你使用SEP=“读取”文件,第一列应该是你的SiC代码,第二列应该是你的行业名称(我不确定所有的名字是否是一个单一的字符串,从你的例子中,他们是),其余的将是他们卖什么?我会考虑一个真实的数据预处理工具,如谷歌精炼(脱机和免费)。R并不真正适合这种任务,即使你可以用R来完成,但要付出更多的痛苦。我认为使用其他程序来处理这个问题会更好,因为你的数据看起来不像一个数据帧(中间有“4个Clth”之类的东西)。这不是一种非常有效的方法,但您可以手动执行。我可以看到,所有的SIC代码都是xxxx xxxx的形式,后跟一个空格。因此,如果你使用SEP=“读取”文件,第一列应该是你的SiC代码,第二列应该是你的行业名称(我不确定所有的名字是否是一个单一的字符串,从你的例子中,他们是),其余的将是他们卖什么?我会考虑一个真实的数据预处理工具,如谷歌精炼(脱机和免费)。R并不真正适合这种任务,即使你可以用R来完成,但要付出更多的痛苦。我认为使用其他程序来处理这个问题会更好,因为你的数据看起来不像一个数据帧(中间有“4个Clth”之类的东西)。这不是一种非常有效的方法,但您可以手动执行。我可以看到,所有的SIC代码都是xxxx xxxx的形式,后跟一个空格。因此,如果你使用SEP=“读取”文件,第一列应该是你的SiC代码,第二列应该是你的行业名称(我不确定所有的名字是否是一个单一的字符串,从你的例子中,他们是),其余的将是他们卖什么?我会考虑一个真实的数据预处理工具,如谷歌精炼(脱机和免费)。R并不真正适合这种任务,即使你可以用R来完成,但要付出更多的痛苦。我认为使用其他程序来处理这个问题会更好,因为你的数据看起来不像一个数据帧(中间有“4个Clth”之类的东西)。这不是一种非常有效的方法,但您可以手动执行。我可以看到,所有的SIC代码都是xxxx xxxx的形式,后跟一个空格。因此,如果您使用sep=“”)阅读该文件,第一列应该是您的SIC代码,第二列应该是您的行业名称(我不确定是否所有名称都是单个字符串,从您的示例来看,它们都是),其余的将是它们销售的产品?我感到惊讶。它非常强大。谢谢你,我很惊讶。它非常强大。谢谢你,我很惊讶。它非常强大。谢谢你,我很惊讶。它非常强大。谢谢大家,非常感谢你们抽出时间!它提供了宝贵的见解。非常感谢您抽出时间!它提供了宝贵的见解。非常感谢您抽出时间!它提供了宝贵的见解。非常感谢您抽出时间!它提供了宝贵的洞察力。