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View Code? Open in Web Editor NEWR的极客理想-工具篇
Home Page: http://fens.me/book-r1
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description 显示工篇篇，应该是工具篇？
description 显示工篇篇，应该是工具篇？
勘误5.4.5排版问题 - client.r文件代码
client.r文件代码
~ vi client.r
library(websockets) #加载类库
client = websocket("ws://192.168.1.201",port=7681) #创建客户端实例
rece<-function(DATA, WS, HEADER) { D='' if(is.raw(DATA)){ cat("raw data") D = rawToChar(DATA) } cat("==>",D,"\n")} #监听receive
set_callback("receive",rece, client)
websocket_write("2222", client) #向服务器发请求
service(client) #输出服务器的返回值
websocket_close(client) #关闭连接代码没换行，改为：
library(websockets) #加载类库
client = websocket("ws://192.168.1.201",port=7681) #创建客户端实例
rece<-function(DATA, WS, HEADER) {
D=''
if(is.raw(DATA)){
cat("raw data")
D = rawToChar(DATA)
}
cat("==>",D,"\n")
}
set_callback("receive",rece, client) #监听receive
websocket_write("2222", client) #向服务器发请求
service(client) #输出服务器的返回值
websocket_close(client) #关闭连接
}勘误6.4.3 代码多了一个数字
代码最后head(y)处
> head(y)
Petal.Length Petal.Width Sepal.Length Sepal.Width Species
1 1.4 0.2 5.1 3.5 setosa
2 1.4 0.2 4.9 3.0 setosa
3 1.3 0.2 4.7 3.2 setosa
4 1.5 0.2 4.6 3.1 setosa
5 1.4 0.2 5.0 3.6 setosa
6最后一行6去掉，改为
> head(y)
Petal.Length Petal.Width Sepal.Length Sepal.Width Species
1 1.4 0.2 5.1 3.5 setosa
2 1.4 0.2 4.9 3.0 setosa
3 1.3 0.2 4.7 3.2 setosa
4 1.5 0.2 4.6 3.1 setosa
5 1.4 0.2 5.0 3.6 setosathanks
R
文字描述错误
P212 “用RHive从历史数据中提取逆回购信息”中前言部分“各种机构 分分出售股票，债券，兑换成现金借给应银行。”应该是“纷纷”
P29页，“JSON文档比XML文档要少很多”，行文不标准，不该用“少”，准确的中文应该是“小”。少形容数量多少，这里明显是说明JSON为什么更适合网络传输所以应该是文件大小的小。
由 iphyer 发现错误 [email protected]
勘误-卷尾语
……相信这套书可以让数据《库》开发者少走弯路，同时也是对统计工作者视界……
多了一个“库”
刘思喆
勘误-3.2.5节 代码排版问题
数据可视化：第一个例子，股票数据分析案例。
> file<-"fun1_rprof.out"> plot(parse_rprof(file)) # plot画图
> ggplot(parse_rprof(file)) # ggplot2画图代码没换行，改为：
> file<-"fun1_rprof.out"
> plot(parse_rprof(file)) # plot画图
> ggplot(parse_rprof(file)) # ggplot2画图勘误-前言部分
勘误和支持
... 一个在线的图书交流网站( https://onbook.me )，方便....
https 改为 http
EN-COOO,p15
https://onbook.me 改为 http://onbook.me ，链接也要对应修改
勘误5.4.5排版问题 - 运行日志
运行客户端程序
> library(websockets)
> client = websocket("ws://192.168.1.201",port=7681)
> rece<-function(DATA, WS, HEADER) { + D='' + if(is.raw(DATA)){ + cat("raw data") + D = rawToChar(DATA) + } + cat("==>",D,"\n")}
> set_callback("receive",rece, client)
> websocket_write("2222", client)
[1] 1
> service(client)
raw data==> You sent 2222
> websocket_close(client)
Client socket 3 was closed.转行问题， 改为
> library(websockets)
> client = websocket("ws://192.168.1.201",port=7681)
> rece<-function(DATA, WS, HEADER) {
+ D=''
+ if(is.raw(DATA)){
+ cat("raw data")
+ D = rawToChar(DATA)
+ }
+ cat("==>",D,"\n")
+}
> set_callback("receive",rece, client)
> websocket_write("2222", client)
[1] 1
> service(client)
raw data==> You sent 2222
> websocket_close(client)
Client socket 3 was closed.Recommend Projects
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