Tag:innovator

  • Extension end data tecdat: R language Bass model for sales forecast

    Time:2021-8-3

    Original link:http://tecdat.cn/?p=3937 Original source:Tuo end data tribal official account Bass diffusion model Bass diffusion modelThree parameters: total number of people who finally purchased products m; Innovation coefficient P; And imitation coefficient Q, nls(Sales~M*(((P+Q)^2/P)\*exp(-(P+Q)\*T79))/(1+(Q/P)\*exp(-(P+Q)\*T79))^2, ## Parameters: ## Estimate Std. Error t value Pr(>|t|) ## M 6.80e+04 3.13e+03 21.74 1.1e-07 *** ## P 6.59e-03 1.43e-03 4.61 0.0025 ** ## Q 6.38e-01 4.14e-02 15.41 1.2e-06 *** ## — ## Signif. codes: 0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ‘ 1 ## ## Residual standard error: 727 on 7 degrees of freedom ## ## Number of iterations to convergence: 8 ## Achieved convergence tolerance: 7.32e-06 #   Gain coefficient Bcoef <- coef(Bass.nls) m <- Bcoef\[1\] p <- Bcoef\[2\] q <- Bcoef\[3\] Set the […]