C# 从字符串中分离文件路径、文件名及扩展名 对文件进行操作时，首先要获取文件路径信息，然后创建文件对象，通过IO流将数据读取大宋内存中并进行处理。在操作文件时，可能还需要提取文件的一些信息，比如，文件路径
I am working with a large list of points (each point has three dimensions x,y,z). I am pretty new with R, so I would like to know what is the best way to represent that kind of information.As far as
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