解决《R语言编程艺术》中read.pnm()中cannot open file 'logo.pgm': No such file or directory的问题
2018-03-10 12:20
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解决《R语言编程艺术》中read.pnm()中cannot open file ‘logo.pgm’: No such file or directory的问题
在《R语言编程艺术》书P53中的问题
首先下载“pixmap”包,解压,拷贝到一个文件夹中。比如我的是“D:\Program Files (x86)\R-3.4.3\library”,将”D:\Program Files (x86)\R-3.4.3\library\pixmap\pictures”中的“logo.pgm”放在pixmap文件夹中
执行命令:getwd(),发现当前工作空间为”“C:/Users/Administrator/Documents”
执行命令:“setwd(“D:/Program Files (x86)/R-3.4.3/library/pixmap”)”,改变工作空间
执行命令:library(pixmap)
执行命令:m<-read.pnm(“logo.pgm”),
执行命令:m,
结果为:
Pixmap image
Type : pixmapGrey
Size : 77x101
Resolution : 1x1
Bounding box : 0 0 101 77
总结:
1:工作空间不对,要注意切换
2:pixmap包中,并没有 “mtrush1.pgm”文件
3:有”logo.pgm”文件可以使用
在《R语言编程艺术》书P53中的问题
首先下载“pixmap”包,解压,拷贝到一个文件夹中。比如我的是“D:\Program Files (x86)\R-3.4.3\library”,将”D:\Program Files (x86)\R-3.4.3\library\pixmap\pictures”中的“logo.pgm”放在pixmap文件夹中
执行命令:getwd(),发现当前工作空间为”“C:/Users/Administrator/Documents”
执行命令:“setwd(“D:/Program Files (x86)/R-3.4.3/library/pixmap”)”,改变工作空间
执行命令:library(pixmap)
执行命令:m<-read.pnm(“logo.pgm”),
执行命令:m,
结果为:
Pixmap image
Type : pixmapGrey
Size : 77x101
Resolution : 1x1
Bounding box : 0 0 101 77
总结:
1:工作空间不对,要注意切换
2:pixmap包中,并没有 “mtrush1.pgm”文件
3:有”logo.pgm”文件可以使用
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