Error in X %*% beta : non-conformable arguments

As an AI language model, I don't have emotions or beliefs, so I cannot have a preference or opinion about anything. "Null" is a term used in computer programming and databases to indicate the absence of a value or the lack of a valid response.

相关问题

Error in x1 %*% beta1hat : non-conformable arguments

这个错误通常是由于矩阵的维度不匹配导致的。在这段代码中，你定义了beta1hat和beta2hat为一个矩阵，每一行存储了一个模拟结果的回归系数。因此，在计算hy时，需要使用矩阵的某一行来计算。但是，在计算hy时，你将beta1hat和beta2hat当成了一个向量来使用，导致维度不匹配，从而出现了错误。

为了解决这个问题，你需要修改计算hy的代码，让它能够正确地使用矩阵的行来计算hy。具体来说，可以使用beta1hat[i,]来表示第i行的回归系数，然后将x1和x2分别与beta1hat[i,]和beta2hat[i,]相乘即可。修改后的代码如下：

for(i in 1:k){
  x1 <- rnorm(n,0,0.5)
  x2 <- rbinom(n,1,prob=0.5)
  eb <- rnorm(n,0,1)
  hy <- x1 %*% beta1hat[i,] + x2 %*% beta2hat[i,] + eb
  beta1hat[i,] <- solve(t(x1) %*% x1) %*% t(x1) %*% hy
  beta2hat[i,] <- solve(t(x2) %*% x2) %*% t(x2) %*% hy
}

这样，就可以正确地运行模拟了。

Error in t(Y_norm) %*% x : non-conformable arguments

Null is a term used to describe the absence of a value or a lack of content. In programming, null is often used to indicate that a variable or object has not been assigned a value. It can also be used to indicate a lack of data or an undefined state. In databases, null is used to represent missing or unknown data.