OK,我们来玩一个游戏,用简单的记事本程序创建如下内容的txt文档,其完整名称为abc.txt:
"haha","","","foo"
"x1","x2","x3",""
"1","2","3",""
"4","5","6",""
"7","8","9",""
现在,需要剔除无用的行次(比如空字符较多的行次),并剔除无用的列!当然,还要转换类型,使R在读取文件后,能生成一个数值矩阵(或数据框),而非字符串组成的矩阵(或数据框)。操作如下:
R的数据操作非常灵活,这里仅是个简单样例,各位还需针对实际情况写脚本。