R语言处理JSON文件的方法
更新时间:2021年05月01日 15:24:44 作者:w3cschool
在本篇文章里小编给大家分享的是一篇关于R语言处理JSON文件的方法,有兴趣的朋友们可以参考下。
JSON文件以人类可读格式将数据存储为文本。 Json代表JavaScript Object Notation。 R可以使用rjson包读取JSON文件。
安装rjson包
在R语言控制台中,您可以发出以下命令来安装rjson包。
install.packages("rjson")
输入数据
通过将以下数据复制到文本编辑器(如记事本)中来创建JSON文件。 使用.json扩展名保存文件,并将文件类型选择为所有文件(*.*)。
{ "ID":["1","2","3","4","5","6","7","8" ], "Name":["Rick","Dan","Michelle","Ryan","Gary","Nina","Simon","Guru" ], "Salary":["623.3","515.2","611","729","843.25","578","632.8","722.5" ], "StartDate":[ "1/1/2012","9/23/2013","11/15/2014","5/11/2014","3/27/2015","5/21/2013", "7/30/2013","6/17/2014"], "Dept":[ "IT","Operations","IT","HR","Finance","IT","Operations","Finance"] }
读取JSON文件
JSON文件由R使用来自JSON()的函数读取。 它作为列表存储在R中。
# Load the package required to read JSON files. library("rjson") # Give the input file name to the function. result <- fromJSON(file = "input.json") # Print the result. print(result)
当我们执行上面的代码,它产生以下结果
$ID [1] "1" "2" "3" "4" "5" "6" "7" "8" $Name [1] "Rick" "Dan" "Michelle" "Ryan" "Gary" "Nina" "Simon" "Guru" $Salary [1] "623.3" "515.2" "611" "729" "843.25" "578" "632.8" "722.5" $StartDate [1] "1/1/2012" "9/23/2013" "11/15/2014" "5/11/2014" "3/27/2015" "5/21/2013" "7/30/2013" "6/17/2014" $Dept [1] "IT" "Operations" "IT" "HR" "Finance" "IT" "Operations" "Finance"
将JSON转换为数据帧
我们可以使用as.data.frame()函数将上面提取的数据转换为R语言数据帧以进行进一步分析。
# Load the package required to read JSON files. library("rjson") # Give the input file name to the function. result <- fromJSON(file = "input.json") # Convert JSON file to a data frame. json_data_frame <- as.data.frame(result) print(json_data_frame)
当我们执行上面的代码,它产生以下结果
id, name, salary, start_date, dept 1 1 Rick 623.30 2012-01-01 IT 2 2 Dan 515.20 2013-09-23 Operations 3 3 Michelle 611.00 2014-11-15 IT 4 4 Ryan 729.00 2014-05-11 HR 5 NA Gary 843.25 2015-03-27 Finance 6 6 Nina 578.00 2013-05-21 IT 7 7 Simon 632.80 2013-07-30 Operations 8 8 Guru 722.50 2014-06-17 Finance
到此这篇关于R语言处理JSON文件的方法的文章就介绍到这了,更多相关R语言对JSON文件操作内容请搜索脚本之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持脚本之家!
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