如何计算日期（年和周）
[英]How to count date (year and week)
问题描述
How do I count the frequency of dates when they are not ymd but year and week format?
当日期不是 ymd 而是年和周格式时，如何计算日期的频率？
Because I am doing research based on weekly analysis, but the answers I found are related to daily data.因为我是根据每周分析做研究，但我发现的答案与每日数据有关。
1 个解决方案
解决方案1
0 2019-04-18 11:59:44
I figured out.我想通了。 This works just fine这工作得很好
data1$count <- ave(!is.na(data1$Trdwnt), substr(data1$Trdwnt, 1,7), FUN=sum)
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