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我有数千个posixt格式的数据。
eg:"Tue Feb 11 14:17:41 +0000 2014"
数据从 2 月 11 日到 2 月 16 日。我想绘制一个直方图,只绘制 2 月 15 日的数据。我试过了
hist(newtime, "hours",plot = TRUE, freq = FALSE, main = "Histogram for 14", format="%d", right = TRUE)
但我不知道如何选择仅2月15日的数据