预测R中给定x的y值 [英] Predict y value for a given x in R

问题描述

我有一个线性模型:

mod=lm(weight~age, data=f2)

我想输入一个年龄值，并从该模型返回了相应的权重.这可能很简单，但是我还没有找到一种简单的方法来实现这一点.

I would like to input an age value and have returned the corresponding weight from this model. This is probably simple, but I have not found a simple way to do this.

推荐答案

如果您的目的仅与一项预测有关，则可以通过以下方式获取系数

If your purposes are related to just one prediction you can just grab your coefficient with

coef(mod)

或者您可以像这样建立一个简单的方程式.

Or you can just build a simple equation like this.

coef(mod)[1] + "Your_Value"*coef(mod)[2]

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