在gtrendsR时间段内尝试使用all下载google搜索时，我缺少日期值。
library('gtrendsR')
g1 = gtrends(keyword = 'blues', geo = 'US', onlyInterest = T, time = "today+5-y")
head(g1$interest_over_time)
date hits geo time keyword gprop category
1 2014-06-22 21 US today+5-y blues web 0
2 2014-06-29 22 US today+5-y blues web 0
3 2014-07-06 21 US today+5-y blues web 0
4 2014-07-13 21 US today+5-y blues web 0
5 2014-07-20 21 US today+5-y blues web 0
6 2014-07-27 21 US today+5-y blues web 0
g2 = gtrends(keyword = 'blues', geo = 'US', onlyInterest = T, time = "all")
head(g2$interest_over_time)
date hits geo time keyword gprop category
1 <NA> 36 US all blues web 0
2 <NA> 36 US all blues web 0
3 <NA> 37 US all blues web 0
4 <NA> 38 US all blues web 0
5 <NA> 36 US all blues web 0
6 <NA> 41 US all blues web 0
任何提示如何解决此问题？