回答編集履歴
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サンプル追加
test
CHANGED
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@@ -9,3 +9,65 @@
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で事足りるように思います。
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```
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df1 <- read.table(text="
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2021/12/01 12:00,xxx
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2021/12/17 19:00,xxx
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2021/12/30 23:00,xxx
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"
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, stringsAsFactors=F, header=F, sep=",")
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ddsum <- list()
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for(i in 1:nrow(df1)){
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dd <- unlist(strsplit(df1[i,1], "[ :]"))
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# 日付ごと全部数える
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if(is.null(ddsum[[ dd[1] ]][["total"]])){
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ddsum[[ dd[1] ]][["total"]] <- 1
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}else{
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ddsum[[ dd[1] ]][["total"]] <- ddsum[[ dd[1] ]][["total"]] +1
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}
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# 日付・時間ごとに数える
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if(is.null(ddsum[[ dd[1] ]][[ dd[2] ]])){
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ddsum[[ dd[1] ]][[ dd[2] ]] <- 1
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}else{
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ddsum[[ dd[1] ]][[ dd[2] ]] <- ddsum[[ dd[1] ]][[ dd[2] ]] +1
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}
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65
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}
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print(str(ddsum))
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```
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