标签:png alt format images http head ges data date
> head(as.Date(data$日期,‘%y%M%D‘))
[1] NA NA NA NA NA NA
data日期格式如下:
解决办法:
> head(as.Date(data$日期,‘%y%m%d‘))
[1] "2017-06-01" "2017-06-01" "2017-06-01" "2017-06-01" "2017-06-01" "2017-06-01"
format的大写全部改成小写即可解决
标签:png alt format images http head ges data date
原文地址:http://www.cnblogs.com/hahaxzy9500/p/7285030.html