如何在 MATLAB 中编写 TN10p 指数（极端气候指数之一）代码？ 我有一个站点的每日最低温度数据列和一个矩阵日期； 日期：[Y m d];%年月日
TN10p=Tmin < 10th percentile (Tn10p)
时的天数或
TN < 10th percentile Let TNij be the daily minimum temperature on day i in period j and let TNin10 be the calendar day 10th percentile centred on a 5-day window for the base period 1961-1990. The percentage of time for the base period is determined where: TNij < TNin10. To avoid possible inhomogeneity across the in-base and out-base periods, the calculation for the base period (1961-1990) requires the use of a bootstrap procedure.
的天数百分比如何提取每年和每月的这个指数？
我需要在 MATLAB 中计算这个指数。