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
    • pmtPayment,每期付款
    • ppmtPrinciple of Payment,每期付款中本金
    • ipmtInterest 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