找本浅显的书，沉静地看看。。。

为什么下xlsx包说我的是3.4.1下不了:

Many r packages to read xls file...try these:
https://www.r-bloggers.com/read-excel-files-from-r/

读取剪切板又说Error in scan(file = file, what = what, sep = sep, quote = quote, dec = dec,  :   12行没有43元:

Check your data, see what happen in the 12th row...

直接用read.csv("C:\\test.csv",header=TRUE)