在MacOS 10.12.1上使用R Studio 1.0.44
这是我第一次使用xml文件而且我遇到了很多麻烦.. 我想将我的xml文件转换为r数据框，如下所示：
Date househouldid memberid session begin end
11/1/15 4FDYT14A1Q 1 235 49448 49453
11/1/15 4FDYT14A1Q 1 1010001 49453 49463
11/1/15 4FDYT14A1Q 1 1010475 49463 49468
我只想在数据框中使用Date，householdid，memberid，session，begin和end。
我试过......
xmldataframe<-xmlToDataFrame("DQA_audxml_20150105_EN.xml")
print(xmldataframe)
得到了这个......
目的地成员regular_guests occasional_guests tvsets household_process
这是xml文件的一部分（我受字符数限制）..
<?xml version="1.0" encoding="UTF-8"?>
<households date="2015-01-05" creation_date="2015-01-11T04:22:35" xmlns:s="http://www.mediametrie.fr/nge/schemas" xmlns:xalan="http://xml.apache.org/xalan">
<household id="95D7N14AFA">
<destinations />
<members>
<member id="1">
<member_process result="OK" vacation="undefined">
<individual_audience />
<alarms />
</member_process>
</member>
<member id="2">
<member_process result="OK" vacation="undefined">
<individual_audience />
<alarms />
</member_process>
</member>
<member id="3">
<member_process result="OK" vacation="undefined">
<individual_audience />
<alarms />
</member_process>
</member>
</members>
<regular_guests />
<occasional_guests />
<tvsets>
<tvset id="1">
<tvset_process result="OK">
<tvset_audience />
<alarms>
<alarm id="AL_T_P_VALID_LAST_HOUR_REBOOT" rule_id="T_P_METER_STOPPING_TIMESTAMPING">
<parameters>
<parameter name="unique_id" value="149" />
<parameter name="reboot_date" value="2015-01-05T03:34:23" />
<parameter name="length" value="0.35116898148148146" />
</parameters>
</alarm>
<alarm id="AL_T_P_VALID_LAST_HOUR_REBOOT" rule_id="T_P_METER_STOPPING_TIMESTAMPING">
<parameters>
<parameter name="unique_id" value="150" />
<parameter name="reboot_date" value="2015-01-05T05:28:34" />
<parameter name="length" value="0.02806712962962963" />
</parameters>
</alarm>
<alarm id="AL_T_P_VALID_LAST_HOUR_REBOOT" rule_id="T_P_METER_STOPPING_TIMESTAMPING">
<parameters>
<parameter name="unique_id" value="151" />
<parameter name="reboot_date" value="2015-01-05T08:22:46" />
<parameter name="length" value="0.07322916666666666" />
</parameters>
</alarm>
<alarm id="AL_T_P_VALID_LAST_HOUR_REBOOT" rule_id="T_P_METER_STOPPING_TIMESTAMPING">
<parameters>
<parameter name="unique_id" value="152" />
<parameter name="reboot_date" value="2015-01-05T14:32:43" />
<parameter name="length" value="0.004803240740740742" />
</parameters>
</alarm>
<alarm id="AL_T_P_VALID_LAST_HOUR_REBOOT" rule_id="T_P_METER_STOPPING_TIMESTAMPING">
<parameters>
<parameter name="unique_id" value="153" />
<parameter name="reboot_date" value="2015-01-05T18:30:47" />
<parameter name="length" value="0.0012384259259259258" />
</parameters>
</alarm>
<alarm id="AL_T_P_VALID_LAST_HOUR_REBOOT" rule_id="T_P_METER_STOPPING_TIMESTAMPING">
<parameters>
<parameter name="unique_id" value="154" />
<parameter name="reboot_date" value="2015-01-06T02:52:01" />
<parameter name="length" value="0.33817129629629633" />
</parameters>
</alarm>
</alarms>
</tvset_process>
</tvset>
</tvsets>
<household_process result="OK" vacation="no">
<alarms />
</household_process>
</household>
<household id="ISDPN14ASG">
<destinations />
<members>
<member id="1">
<member_process result="OK" vacation="undefined">
<individual_audience />
<alarms />
</member_process>
</member>
<member id="2">
<member_process result="OK" vacation="undefined">
<individual_audience />
<alarms />
</member_process>
</member>
<member id="3">
<member_process result="OK" vacation="undefined">
<individual_audience />
<alarms />
</member_process>
</member>
<member id="4">
<member_process result="OK" vacation="undefined">
<individual_audience />
<alarms />
</member_process>
</member>
<member id="5">
<member_process result="OK" vacation="undefined">
<individual_audience />
<alarms />
</member_process>
</member>
</members>
<regular_guests />
<occasional_guests />
<tvsets>
<tvset id="1">
<tvset_process result="KO">
<tvset_audience />
<alarms>
<alarm id="AL_R_P_EVENT_CHRONOLOGY" rule_id="R_P_EVENT_CHRONOLOGY">
<parameters>
<parameter name="unique_id" value="16195" />
</parameters>
</alarm>
<alarm id="AL_PROCESS_STOP" rule_id="R_P_EVENT_CHRONOLOGY">
<parameters />
</alarm>
</alarms>
</tvset_process>
</tvset>
</tvsets>
<household_process result="KO" vacation="no">
<alarms>
<alarm id="AL_T_FP_HOUSEHOLD_ABS_DECLARATION" rule_id="T_FP_HOUSEHOLD_ABS_DECLARATION">
<parameters />
</alarm>
<alarm id="AL_R_FP_NO_TVSET_KO" rule_id="R_FP_NO_TVSET_KO">
<parameters>
<parameter name="tvset_id" value="1" />
</parameters>
</alarm>
<alarm id="AL_R_FP_AT_LEAST_ONE_TVSET_OK" rule_id="R_FP_AT_LEAST_ONE_TVSET_OK">
<parameters />
</alarm>
</alarms>
</household_process>
</household>
<household id="4FDYT14A1Q">
<destinations />
<members>
<member id="1">
<member_process result="OK" vacation="undefined">
<individual_audience />
<alarms />
</member_process>
</member>
<member id="2">
<member_process result="OK" vacation="undefined">
<individual_audience>
<individual_audience_tvset id="1">
<channel session="1010497" begin="46722" end="46738" />
<channel session="48" begin="46738" end="46743" />
<channel session="235" begin="46743" end="46748" />
<channel session="47" begin="46748" end="46753" />
<channel session="1010383" begin="46753" end="46973" />
<channel session="1010497" begin="46973" end="46983" />
<channel session="1010319" begin="46983" end="46993" />
<channel session="1010072" begin="46993" end="47578" />
<channel session="1010499" begin="47578" end="47618" />
<channel session="47" begin="47618" end="47633" />
<channel session="1010383" begin="47633" end="47693" />
<channel session="48" begin="47693" end="47703" />
<channel session="235" begin="47703" end="47728" />
<channel session="1010469" begin="47728" end="47778" />
<channel session="235" begin="47778" end="47783" />
<channel session="48" begin="47783" end="47828" />
<channel session="1010367" begin="47828" end="47853" />
<channel session="48" begin="47853" end="48373" />
<channel session="1010383" begin="48373" end="48573" />
<channel session="48" begin="48573" end="49433" />
<channel session="1010452" begin="49433" end="49448" />
<channel session="235" begin="49448" end="49453" />
<channel session="1010001" begin="49453" end="49463" />
<channel session="1010475" begin="49463" end="49468" />
<channel session="1010383" begin="49468" end="49483" />
<channel session="48" begin="49483" end="49508" />
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<channel session="235" begin="60933" end="60938" />
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<channel session="48" begin="60953" end="60968" />
<channel session="235" begin="60968" end="60993" />
<channel session="1010072" begin="60993" end="61483" />
<channel session="1010499" begin="61483" end="61538" />
<channel session="48" begin="61538" end="61543" />
<channel session="47" begin="61543" end="61578" />
<channel session="1010383" begin="61578" end="61603" />
<channel session="1010072" begin="61603" end="63428" />
<channel session="1010497" begin="63428" end="63438" />
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<channel session="47" begin="64373" end="64378" />
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<channel session="48" begin="85178" end="85398" />
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<channel session="1010258" begin="85493" end="85638" />
<channel session="1010474" begin="85638" end="85785" />
</individual_audience_tvset>
</individual_audience>
<alarms />
</member_process>
</member>
<member id="3">
<member_process result="OK" vacation="undefined">
<individual_audience>
<individual_audience_tvset id="1">
<channel session="1010493" begin="54476" end="54490" />
<channel session="47" begin="54490" end="55035" />
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<channel session="1010379" begin="57615" end="57865" />
<channel session="48" begin="57865" end="58079" />
</individual_audience_tvset>
</individual_audience>
<alarms />
</member_process>
</member>
<member id="4">
<member_process result="OK" vacation="undefined">
<individual_audience />
<alarms />
</member_process>
</member>
</members>
<regular_guests />
<occasional_guests />
<tvsets>
<tvset id="1">
<tvset_process result="OK">
<tvset_audience>
<channel session="1010497" begin="46708" end="46738" />
<channel session="48" begin="46738" end="46743" />
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<channel session="1010072" begin="74443" end="74453" />
<channel session="1010499" begin="74453" end="74883" />
<channel session="1010497" begin="74883" end="74938" />
<channel session="1010072" begin="74938" end="74953" />
<channel session="47" begin="74953" end="75603" />
<channel session="1010497" begin="75603" end="77673" />
<channel session="1010383" begin="77673" end="79208" />
<channel session="1010354" begin="79208" end="79228" />
<channel session="235" begin="79228" end="79233" />
<channel session="1010497" begin="79233" end="79603" />
<channel session="1010072" begin="79603" end="80088" />
<channel session="1010497" begin="80088" end="80238" />
<channel session="1010499" begin="80238" end="80253" />
<channel session="235" begin="80253" end="80258" />
答案 0 :(得分：2)
这只是肘部油脂，熟悉XML的结构。相对较新的purrr包在这里非常有用。但是，我认为你的问题仍然有点模糊，缺乏有效的XML文件不仅仅是个问题：
library(xml2)
library(purrr)
library(dplyr)
hh <- read_xml("~/data/so.xml")
xml_find_all(hh, ".//household") %>%
map_df(function(x) {
id <- xml_attr(x, "id")
members <- xml_find_all(x, ".//member")
map_df(members, function(y) {
channel_sessions <- xml_find_all(y, ".//channel")
if (length(channel_sessions) == 0) {
NULL
} else {
xml_attrs(channel_sessions) %>%
map_df(as.list) %>%
mutate(memberid=xml_attr(y, "id"),
household=id)
}
})
}) %>%
mutate(date=xml_find_first(hh, "//households") %>%
xml_attr("creation_date") %>%
as.Date())
## # A tibble: 176 × 6
## session begin end memberid household date
## <chr> <chr> <chr> <chr> <chr> <date>
## 1 1010497 46722 46738 2 4FDYT14A1Q 2015-01-11
## 2 48 46738 46743 2 4FDYT14A1Q 2015-01-11
## 3 235 46743 46748 2 4FDYT14A1Q 2015-01-11
## 4 47 46748 46753 2 4FDYT14A1Q 2015-01-11
## 5 1010383 46753 46973 2 4FDYT14A1Q 2015-01-11
## 6 1010497 46973 46983 2 4FDYT14A1Q 2015-01-11
## 7 1010319 46983 46993 2 4FDYT14A1Q 2015-01-11
## 8 1010072 46993 47578 2 4FDYT14A1Q 2015-01-11
## 9 1010499 47578 47618 2 4FDYT14A1Q 2015-01-11
## 10 47 47618 47633 2 4FDYT14A1Q 2015-01-11
## # ... with 166 more rows
答案 1 :(得分：0)
在同一标题中使用 transform 和 xml 的单词，考虑XSLT，这是专门用于将源XML文件转换为最终用途需求的专用语言导入R数据帧。现在提出的挑战是R没有专门的库来运行XSLT。
尽管如此，R可以将命令行调用到external processers（即使在Python，PHP，Java等其他语言中）也可以将输入转换为输出。以下是两个版本：对于Windows（使用Powershell对XslCompiledTransform的调用）和Linux / Mac（通常在大多数发行版上使用xsltproc）：
XSLT 脚本（另存为.xsl，格式正确的xml文件）
<xsl:transform xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
<xsl:output version="1.0" encoding="UTF-8" indent="yes" />
<xsl:strip-space elements="*"/>
<xsl:template match="/households">
<xsl:copy>
<xsl:apply-templates select="household"/>
</xsl:copy>
</xsl:template>
<xsl:template match="household|members|member|member_process|individual_audience|individual_audience_tvset">
<xsl:apply-templates/>
</xsl:template>
<xsl:template match="channel">
<tvset>
<date><xsl:value-of select="ancestor::households/@date"/></date>
<household_id><xsl:value-of select="ancestor::household/@id"/></household_id>
<member_id><xsl:value-of select="ancestor::member/@id"/></member_id>
<session><xsl:value-of select="@session"/></session>
<begin><xsl:value-of select="@begin"/></begin>
<end><xsl:value-of select="@end"/></end>
</tvset>
</xsl:template>
<xsl:template match="tvsets"/>
</xsl:transform>
PowerShell 脚本（另存为.ps1文件，仅适用于Windows）
param ($xml, $xsl, $output)
if (-not $xml -or -not $xsl -or -not $output) {
Write-Host "& .\xslt.ps1 [-xml] xml-input [-xsl] xsl-input [-output] transform-output"
exit;
}
trap [Exception]{
Write-Host $_.Exception;
}
$xslt = New-Object System.Xml.Xsl.XslCompiledTransform;
$xslt.Load($xsl);
$xslt.Transform($xml, $output);
Write-Host "generated" $output;
R （Windows）
library(XML)
system(paste0('Powershell.exe -File',
' "C:\\Path\\To\\PowerShell\\Script.ps1"',
' "C:\\Path\\To\\Input.xml"',
' "C:\\Path\\To\\XSLT\\Script.xsl"',
' "C:\\Path\\To\\Output.xml"'))
df <- xmlToDataFrame("C:\\Path\\To\\Output.xml")
head(df, 10)
# date household_id member_id session begin end
# 1 2015-01-05 4FDYT14A1Q 2 1010497 46722 46738
# 2 2015-01-05 4FDYT14A1Q 2 48 46738 46743
# 3 2015-01-05 4FDYT14A1Q 2 235 46743 46748
# 4 2015-01-05 4FDYT14A1Q 2 47 46748 46753
# 5 2015-01-05 4FDYT14A1Q 2 1010383 46753 46973
# 6 2015-01-05 4FDYT14A1Q 2 1010497 46973 46983
# 7 2015-01-05 4FDYT14A1Q 2 1010319 46983 46993
# 8 2015-01-05 4FDYT14A1Q 2 1010072 46993 47578
# 9 2015-01-05 4FDYT14A1Q 2 1010499 47578 47618
# 10 2015-01-05 4FDYT14A1Q 2 47 47618 47633
R （Linux / Mac）
library(XML)
system('xsltproc /path/to/XSLT_Script.xsl /path/to/Input.xml -o path/to/Output.xml')
df <- xmlToDataFrame("path/to/Output.xml")