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covij=sumyi-meanyi*,-meanyjlength,…
成交价高频算法1算术平均meanprice2,…
函数功能拓展refrefmeanrefref,…
函数功能拓展refrefmeanrefref,…
0常用统计量以mean函数为,是不会报错的returnmeana//,每一列求均值returnmeana1,每一行求均值returnmeana0,…
函数功能拓展refrefmeanrefref,…
矩阵年化expreturn:=meanrexpcov,:=r1expreturn:=meanrexpcov,:=r1expreturn:=meanrexpcov,…
平均绝对误差tdtdmean_absolute,均方误差tdtdmean_squared,均方误差tdtdmean_squared,…
nd_s:=meanbonds_,久期d_m:=meanbonds_,久期d_l:=meanbonds_,…
a范例codem:=meandpopdpop,…