Numpy 附加库

财金

Function	Desc
fv(rate,nper,pmt,pv[,when])	未来值
pv(rate,nper,pmt[,fv,when])	现值
npv(rate,values)	净现值
pmt(rate,nper,pv[,fv,when])	等额本息，每期付款
ppmt(rate,per,nper,pv[,fv,when])	等额本息中第per期本金
ipmt(rate,per,nper,pv[,fv,when])	等额本息中第per期利息
irr(values)	内部收益率
mirr(values,finance_rate,reinvest_rate)	考虑期内再融资成本finance_rate、收益再投资收益reinvest_rate
nper(rate,pmt,pv[,fv,when])	每期付款
rate(nper,pmt,pv,fv[,when,guess,tol,...])	每期间的利率

• 参数说明

  • pv：现值
  • fv：未来值
  • when：期初或期末付款
    • 0/end
    • 1/begin
  • pmt：Payment，每期付款
  • ppmt：Principle of Payment，每期付款中本金
  • ipmt：Interest of Payment，每期付款中利息

• 值说明

  • 正值：收入
  • 负值：支出

Histogram

Function	Desc
histogram(a[,bins,range,normed,weights,...])
histogram2d(x,y[,bins,range,normed,weights,...])
histogramdd(sample[,bins,range,normed,weights,...])
bincount(x[,weights,minlength])
histogram_bin_edges(a[,bin,range,weights])
digitize(x,bins[,right])

Set

Operation

Routine	Function Version
in1d(ar1,ar2[,assume_unique,invert])	是否包含，始终返回1维数组
isin(element,test_element[,...])	保持elementshape返回
intersect1d(ar1,ar2[,assume_unique,...])	交集
union1d(ar1,ar2[,assume_unique,...])	并集
setdiff1d(ar1,ar2[,assume_unique,...])	ar1-ar2
setxor1d(ar1,ar2[,assume_unique,...])	差集

Unique

Routine	Function Version
unique(ar[,return_index,return_inverse,return_counts,axis])	返回唯一值