miss.lm.fit: Fitting Linear Regression Model with Missing Values
In misaem: Linear Regression and Logistic Regression with Missing Covariates

This function is used inside miss.lm to fit linear regression model with missing values, by EM algorithm.

1	miss.lm.fit(x, y, control = list())

`x`	design matrix with missingness N p*.
`y`	response vector N 1*.
`control`	a list of parameters for controlling the fitting process. For `miss.lm.fit` this is passed to `miss.lm.control`.

a list with following components:

`coefficients`	Estimated β.
`ll`	Observed log-likelihood.
`s.resid`	Estimated standard error for residuals.
`s.err`	Standard error for estimated parameters.
`mu.X`	Estimated μ.
`Sig.X`	Estimated Σ.