是否可以将分数年和日期转换为R？
中的实际日期格式例如，在我下面的示例数据的time列中，1900.00对应于1900年1月，1900.08对应于2月。 dayofyr对应于年份。
myData＆lt; - 结构（列表（时间= c（1900,1900,1900,1900,1900,1900,1900， 1900,1900,1900,1900,1900,1900,1900,1900,1900,1900,1900， 1900,1900,1900,1900,1900,1900,1900,1900,1900,1900,1900， 1900,1900,1900.08,1900.08,1900.08,1900.08,1900.08,1900.08， 1900.08,1900.08,1900.08,1900.08,1900.08,1900.08,1900.08， 1900.08,1900.08,1900.08,1900.08,1900.08,1900.08,1900.08， 1900.08,1900.08,1900.08,1900.08,1900.08,1900.08,1900.08， 1900.08,1900.08,1900.17,1900.17,1900.17,1900.17,1900.17， 1900.17,1900.17,1900.17,1900.17,1900.17,1900.17,1900.17， 1900.17,1900.17,1900.17,1900.17,1900.17,1900.17,1900.17， 1900.17,1900.17,1900.17,1900.17,1900.17,1900.17,1900.17， 1900.17,1900.17,1900.17,1900.17,1900.17,1900.25,1900.25， 1900.25,1900.25,1900.25,1900.25,1900.25,1900.25,1900.25， 1900.25,1900.25,1900.25,1900.25,1900.25,1900.25,1900.25， 1900.25,1900.25,1900.25,1900.25,1900.25,1900.25,1900.25， 1900.25,1900.25,1900.25,1900.25,1900.25,1900.25,1900.25， 1900.33,1900.33,1900.33,1900.33,1900.33,1900.33,1900.33， 1900.33,1900.33,1900.33,1900.33,1900.33,1900.33,1900.33， 1900.33,1900.33,1900.33,1900.33,1900.33,1900.33,1900.33， 1900.33,1900.33,1900.33,1900.33,1900.33,1900.33,1900.33， 1900.33,1900.33,1900.33,1900.42,1900.42,1900.42,1900.42， 1900.42,1900.42,1900.42,1900.42,1900.42,1900.42,1900.42， 1900.42,1900.42,1900.42,1900.42,1900.42,1900.42,1900.42， 1900.42,1900.42,1900.42,1900.42,1900.42,1900.42,1900.42， 1900.42,1900.42,1900.42,1900.42,1900.42,1900.5,1900.5， 1900.5,1900.5,1900.5,1900.5,1900.5,1900.5,1900.5,1900.5， 1900.5,1900.5,1900.5,1900.5,1900.5,1900.5,1900.5,1900.5， 1900.5,1900.5,1900.5,1900.5,1900.5,1900.5,1900.5,1900.5， 1900.5,1900.5,1900.5,1900.5,1900.5,1900.58,1900.58,1900.58， 1900.58,1900.58,1900.58,1900.58,1900.58,1900.58,1900.58， 1900.58,1900.58,1900.58,1900.58,1900.58,1900.58,1900.58， 1900.58,1900.58,1900.58,1900.58,1900.58,1900.58,1900.58， 1900.58,1900.58,1900.58,1900.58,1900.58,1900.58,1900.58， 1900.67,1900.67,1900.67,1900.67,1900.67,1900.67,1900.67， 1900.67,1900.67,1900.67,1900.67,1900.67,1900.67,1900.67， 1900.67,1900.67,1900.67,1900.67,1900.67,1900.67,1900.67， 1900.67,1900.67,1900.67,1900.67,1900.67,1900.67,1900.67， 1900.67,1900.67,1900.75,1900.75,1900.75,1900.75,1900.75， 1900.75,1900.75,1900.75,1900.75,1900.75,1900.75,1900.75， 1900.75,1900.75,1900.75,1900.75,1900.75,1900.75,1900.75， 1900.75,1900.75,1900.75,1900.75,1900.75,1900.75,1900.75， 1900.75,1900.75,1900.75,1900.75,1900.75,1900.83,1900.83， 1900.83,1900.83,1900.83,1900.83,1900.83,1900.83,1900.83， 1900.83,1900.83,1900.83,1900.83,1900.83,1900.83,1900.83， 1900.83,1900.83,1900.83,1900.83,1900.83,1900.83,1900.83， 1900.83,1900.83,1900.83,1900.83,1900.83,1900.83,1900.83， 1900.92,1900.92,1900.92,1900.92,1900.92,1900.92,1900.92， 1900.92,1900.92,1900.92,1900.92,1900.92,1900.92,1900.92， 1900.92,1900.92,1900.92,1900.92,1900.92,1900.92,1900.92， 1900.92,1900.92,1900.92,1900.92,1900.92,1900.92,1900.92， 1900.92,1900.92,1900.92），dayofyr = 1：366），class = c（“tbl_df”， “tbl”，“data.frame”），row.names = c（NA，-366L）,. Name = c（“time”， “dayofyr”））
答案 0 :(得分：1)
使用\u2063foo foo删除小数部分，转换为附加floor的字符串，将其转换为"-01-01"类，并添加天数减1.不使用任何包。
"Date"