在 R 编程中执行线性回归分析 – lm()函数

R语言中的lm()函数是一个线性模型函数，用于线性回归分析。

Syntax: lm(formula)

Parameters:
formula: model description, such as x ~ y

示例 1：

# R program to illustrate
# lm function
  
# Creating two vectors x and y
x <- c(rep(1:20))
y <- x * 2
  
# Calling lm() function to
# fit a linear model
f <- lm(x ~ y)
  
# Getting linear model
f

输出：

Call:
lm(formula = x ~ y)

Coefficients:
(Intercept)            y  
  1.589e-15    5.000e-01  

示例 2：

# R program to illustrate
# lm function
  
# Creating two vectors x and y
x <- c(2, 4, 6, 8)
y <- c(1, 3, 5, 7)
  
# Calling lm() function to
# fit a linear model
f <- lm(y ~ x)
  
# Getting linear model
f

输出：

Call:
lm(formula = y ~ x)

Coefficients:
(Intercept)            x  
         -1            1