CUMPROD function

Cumulative Product

This function returns the cumulative product of the elements of the input array or time series. The result is an object of the same class of the input, and its elements are the cumulative product of the current and the previous elements of the input.

If the input is a time series, users can provide the argument TSRANGE in order to project the input time series before the cumulative product.

CUMPROD(x=NULL, TSRANGE=NULL, ignoreNA=FALSE, avoidCompliance=FALSE, ...)

Arguments

• x: Input numerical array or time series that must satisfy the compliance control check defined in is.bimets.
• TSRANGE: Optional date range of operations that process the input time series. TSRANGE must be specified as an array composed by starting year, starting period, ending year and ending period, i.e. TSRANGE=c(START_Y,START_P,END_Y,END_P). The projection into the time interval specified in TSRANGE takes place before the cumulative product.
• ignoreNA: Ignore missing values.
• avoidCompliance: If TRUE, compliance control check of input time series will be skipped. See is.bimets
• ...: Backward compatibility.

Returns

This function returns an object of the same class of the input, i.e. an array or a BIMETS time series.

See Also

TSPROJECT

MOVAVG

TSDELTA

TSLAG

TSPROJECT

TSEXTEND

TSLEAD

INDEXNUM

VERIFY_MAGNITUDE

Examples

#create ts
        ts1<-TSERIES(INTS(1,10),START=c(2000,1),FREQ='M')
        out_CUMPROD<-CUMPROD(ts1)
        TABIT(out_CUMPROD)
            
        out_CUMPROD<-CUMPROD(ts1,TSRANGE=c(2000,4,2001,1))      
        TABIT(ts1,out_CUMPROD)
  
        #define an array
        arr1<-c(INTS(1,5),INTS(-1,-5))
        out_CUMPROD<-CUMPROD(arr1)
        print(out_CUMPROD)