我想从财政部网站下载10年期联邦票据收益率：https://www.treasury.gov/resource-center/data-chart-center/interest-rates/Pages/TextView.aspx?data=yield
要解析上述网页并检索最近10年的国库券收益率，我曾按照此处提供的说明操作： Parsing 10-year federal note yield from the website
library(httr)
URL = "https://www.treasury.gov/resource-center/data-chart-center/interest-rates/Pages/TextView.aspx?data=yield"
urldata <- GET(URL)
data <- readHTMLTable(rawToChar(urldata$content),
stringsAsFactors = FALSE)
data <- as.data.frame((data[69]))
names(data) <- gsub("NULL.","", names(data)) # Take out "NULL."
但它不再有效。
有什么想法可能是错误的或其他建议吗？
答案 0 :(得分：3)
这不能回答为什么您的代码不再有效的具体问题。这是使用html {
margin: 0;
}
body {
background: #DCDCDC;
width: 100%;
margin: 0;
}
.carousel-control.left, .carousel-control.right {
background-image: none
}
#firstrow {
font-size: 2em;
padding: 0px 0 0 0;
width: 100%;
text-align: center;
color: black;
position: relative;
}
#firstrow span {
font-family: Impact, Impact5, Charcoal6, sans-serif;
font-size: 1.3em;
}
#firstrow p {
font-family: Helvetica,
}
@media all and (max-width: 2000px) {
#headerbutton-nederlands {
position: absolute;
bottom: 0px;
right: -90px;
line-height: 40px;
}
}
.planettext {
text-align: center;
font-size: 1.5em;
color: #000;
margin-top: 200px;
margin-bottom: 30px;
width: 100%;
background-color: #DCDCDC;
font-weight: bold;
}
.plutotext {
text-align: center;
font-size: 1.5em;
color: #000;
margin-top: 100px;
margin-bottom: 30px;
width: 100%;
background-color: #D3D3D3;
font-weight: bold;
margin: 00;
}
#pluto {
background-color: #D3D3D3;
height: 550px;
width: 100%;
}
@media all and (max-width: 900px) {
#headerbutton-nederlands { display: none; }
#headerbutton-english { display: none; }
}
@media all and (max-width: 2000px) {
#headerbutton-nederlands {
position: absolute;
bottom: 0px;
right: -70px;
line-height: 40px;
}
}
@media all and (max-width: 1450px) {
#headerbutton-nederlands {
position: absolute;
font-size: 14px;
line-height: 30px;
right: -55px;
}
}
@media all and (max-width: 1200px) {
#headerbutton-nederlands {
font-size: 13px;
line-height: 25px;
right: -55px;
}
}
@media all and (max-width: 1080px) {
#headerbutton-nederlands {
font-size: 10px;
line-height: 20px;
right: -40px;
}
}
@media all and (max-width: 2000px) {
#headerbutton-english {
position: absolute;
bottom: 0px;
right: 100px;
line-height: 40px;
}
}
@media all and (max-width: 1450px) {
#headerbutton-english {
position: absolute;
font-size: 14px;
right: 80px;
line-height: 30px
}
}
@media all and (max-width: 1200px) {
#headerbutton-english {
font-size: 13px;
line-height: 25px;
right: 50px;
}
}
@media all and (max-width: 1080px) {
#headerbutton-english {
font-size: 10px;
line-height: 20px;
right: 50px;
}
}
.planet {
margin-bottom: 30px;
position: relative;
}
.planet img {
height: 300px;
max-width: none;
margin-bottom: 20px;
}
.bannertext {
font-size: 1.3em;
line-height: 15px;
position: relative;
}
.bannertext h1 {
font-size: 2em;
}
.bannertext2 {
font-size: 2em;
}
.mobileShow { display: none;}
.mobileHide { display: inline;}
/* Smartphone Portrait and Landscape */
@media only screen
and (max-device-width : 480px){
.mobileShow { display: inline;}
.mobileHide { display: none;}
.planet img{
height: 200px;
}
}
#headerbutton-nederlands {
position: absolute;
font-weight: bold;
-webkit-border-radius: 5px;
color: white;
background-color: #778899;
width: 13%;
text-align: center;
border: white 2px solid ;
}
#headerbutton-english {
position: absolute;
font-weight: bold;
-webkit-border-radius: 5px;
color: white;
background-color: #778899;
width: 13%;
text-align: center;
border: white 2px solid ;
}
包的替代方案，它简化了许多抓取操作。特别是在下面，使用类ID CSS选择器rvest来选择表。这使得它更容忍页面格式更改。使用运算符％＆gt;％进行链接可以实现非常紧凑的代码。
.t-chart