代码:da = read.table("C:UserslxjDesktopFINANCE\001d-ibm3dx7008.txt", header = T)
结果:Warning messages:
Problem in count.fields(file = file, sep = sep, ski..: Couldn't open file "C:UserslxjDesktopFINANCEd-ibm3dx7008.txt" for "r" (read): Invalid argument
Use traceback() to see the call stack
数据的前五行
Date rtn vwretd ewretd sprtrn
19700102 0.000686 0.012137 0.033450 0.010211
19700105 0.009596 0.006375 0.018947 0.004946
19700106 0.000679 -0.007233 -0.005776 -0.006848
19700107 0.000678 -0.001272 0.003559 -0.002047
求解