计算r中的相对RMSE [英] Calculate relative RMSE in r

问题描述

为了获得我的预测模型和真实值的相对RMSE，我使用了代码

To get the relative RMSE of my predicted model and true values,I used the code

ratio<-prediction1/ISEtrain  

rRMSE1<-sqrt(mean((1-ratio)^2))

但是我失败了，输出为"[1] Inf".我的代码有什么问题?

but I failed , with the output "[1] Inf". What is wrong with my code?

谢谢！

推荐答案

由于除以零，因此得到 Inf .

You are getting Inf because you are dividing by zero.

遵循Wikipedia对标准化RMSE的定义( https://en.wikipedia.org/wiki/Root-mean-square_deviation )，您可能需要:

Following Wikipedia's definition of the normalized RMSE (https://en.wikipedia.org/wiki/Root-mean-square_deviation), you probably want:

sqrt( mean( (prediction1-ISEtrain)^2) ) / ( max(ISEtrain)-min(ISEtrain) )

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