无法为此找到很多支持。我正在尝试将大量RTF文件读入R来构建数据框，但我很难找到一种解析RTF文件并忽略的好方法文件的结构/格式。实际上我只想从每个文件中提取两行文本 - 但它嵌套在文件结构中。
我在下面粘贴了一个示例RTF文件。我想要捕获的两个字符串是：
“今天购买26英寸液晶电视或下个月购买32英寸？购买高科技耐用产品的建模”
“技术水平和管理方面的影响。” （完整段落）
有关如何有效解析此问题的任何想法？我认为正则表达式可能对我有所帮助，但我正在努力形成正确的表达方式来完成工作。
{\rtf1\ansi\ansicpg1252\cocoartf1265
{\fonttbl\f0\fswiss\fcharset0 ArialMT;\f1\froman\fcharset0 Times-Roman;}
{\colortbl;\red255\green255\blue255;\red0\green0\blue0;\red109\green109\blue109;}
\margl1440\margr1440\vieww10800\viewh8400\viewkind0
\deftab720
\itap1\trowd \taflags0 \trgaph108\trleft-108 \trbrdrt\brdrnil \trbrdrl\brdrnil \trbrdrt\brdrnil \trbrdrr\brdrnil
\clvertalt \clshdrawnil \clwWidth15680\clftsWidth3 \clbrdrt\brdrnil \clbrdrl\brdrnil \clbrdrb\brdrnil \clbrdrr\brdrnil \clpadl0 \clpadr0 \gaph\cellx8640
\itap2\trowd \taflags0 \trgaph108\trleft-108 \trbrdrt\brdrnil \trbrdrl\brdrnil \trbrdrt\brdrnil \trbrdrr\brdrnil
\clmgf \clvertalt \clshdrawnil \clwWidth14840\clftsWidth3 \clbrdrt\brdrnil \clbrdrl\brdrnil \clbrdrb\brdrnil \clbrdrr\brdrnil \clpadl0 \clpadr0 \gaph\cellx4320
\clmrg \clvertalt \clshdrawnil \clwWidth14840\clftsWidth3 \clbrdrt\brdrnil \clbrdrl\brdrnil \clbrdrb\brdrnil \clbrdrr\brdrnil \clpadl0 \clpadr0 \gaph\cellx8640
\pard\intbl\itap2\pardeftab720
\f0\b\fs26 \cf0 Buy a 26 Inch LCD-TV Today or a 32 Inch Next Month? Modeling Purchases of High-tech Durable Products\nestcell
\pard\intbl\itap2\nestcell \lastrow\nestrow
\pard\intbl\itap1\pardeftab720
\f1\b0\fs24 \cf0 \
\pard\intbl\itap1\pardeftab720
\f0\fs26 \cf0 The technology level of new high-tech durable products, such as digital cameras and LCD-TVs, continues to go up, while prices continue to go down. Consumers may anticipate these trends. In particular, a consumer faces several options. The first is to buy the current level of technology at the current price. The second is not to buy and stick with the currently owned (old) level of technology. Hence, the consumer postpones the purchase and later on buys the same level of technology at a lower price, or better technology at the same price. We develop a new model to describe consumers\'92 decisions with respect to buying these products. Our model is built on the theory of consumer expectations of price and the well-known utility maximizing framework. Since not every consumer responds the same, we allow for observed and unobserved consumer heterogeneity. We calibrate our model on a panel of several thousand consumers. We have information on the currently owned technology and on purchases in several categories of high-tech durables. Our model provides new insights in these product markets and managerial implications.\cell \lastrow\row
\pard\pardeftab720
\f1\fs24 \cf0 \
}
答案 0 :(得分：2)
1）如果你在Windows上，一个简单的方法是使用写字板或Word读取它，然后将其保存为纯文本文档。
2）或者，要直接在R中解析它，请读入rtf文件，找到具有给定模式的行，pat生成g。然后用生成\\'的单引号替换任何noq字符串。最后删除pat和任何尾随垃圾。这适用于示例，但是如果除了我们已经处理的\\'之外还有其他嵌入的\\字符串，则可能需要修改模式：
Lines <- readLines("myfile.rtf")
pat <- "^\\\\f0.*\\\\cf0 "
g <- grep(pat, Lines, value = TRUE)
noq <- gsub("\\\\'", "'", g)
sub("\\\\.*", "", sub(pat, "", noq))
对于指定的文件，这是输出：
[1] "Buy a 26 Inch LCD-TV Today or a 32 Inch Next Month? Modeling Purchases of High-tech Durable Products"
[2] "The technology level of new high-tech durable products, such as digital cameras and LCD-TVs, continues to go up, while prices continue to go down. Consumers may anticipate these trends. In particular, a consumer faces several options. The first is to buy the current level of technology at the current price. The second is not to buy and stick with the currently owned (old) level of technology. Hence, the consumer postpones the purchase and later on buys the same level of technology at a lower price, or better technology at the same price. We develop a new model to describe consumers'92 decisions with respect to buying these products. Our model is built on the theory of consumer expectations of price and the well-known utility maximizing framework. Since not every consumer responds the same, we allow for observed and unobserved consumer heterogeneity. We calibrate our model on a panel of several thousand consumers. We have information on the currently owned technology and on purchases in several categories of high-tech durables. Our model provides new insights in these product markets and managerial implications."
多次修改。添加了Wordpad / Word解决方案。