在 MacOS 10.12.1 上使用 R Studio 1.0.44
这是我第一次使用 xml 文件，我遇到了很多麻烦.. 我想将我的 xml 文件转换为如下所示的 r 数据框:
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
我只想要数据框中的 Date、householdid、memberid、session、begin 和 end。
我试过...
xmldataframe<-xmlToDataFrame("DQA_audxml_20150105_EN.xml")
print(xmldataframe)
得到这个...
destinations members regular_guests occasional_guests tvsets household_process
这是 xml 文件的一部分(我受限于字符数)..
<?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" />
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<channel session="1010001" begin="49453" end="49463" />
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<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" />
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<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" />
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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" />
最佳答案
这只是一些苦差事，熟悉 XML 的结构。相对较新的 purrr 包在这里非常有用。但是，我认为您的问题仍然有点含糊，缺少有效的 XML 文件不仅仅是问题所在:
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
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