I have been struggling to find some informaation on what lm exactly does.
I know it uses the QR decomp. However, I was recently faced with a
somewhat badly scaled matrix and summary(lm) said
Coefficients: ( 4 not defined because of singularities)
does anyone know how lm chooses these 4
Dear Jean,
On Thu, 26 Jun 2003, Jean Eid wrote:
. . .
My other question is on the regression diagnostics particularly plotting
Cook's distance. what is the rule to decide on outliers. If I read the
plot correctly, the labeled distances (vertical lines) are outliers. But I
have gotten cook's
On Thu, 26 Jun 2003, Jean Eid wrote:
I have been struggling to find some informaation on what lm exactly does.
I know it uses the QR decomp. However, I was recently faced with a
somewhat badly scaled matrix and summary(lm) said
Coefficients: ( 4 not defined because of singularities)
I have been struggling to find some informaation on what lm exactly does.
I know it uses the QR decomp. However, I was recently faced with a
somewhat badly scaled matrix and summary(lm) said
Coefficients: ( 4 not defined because of singularities)
does anyone know how lm chooses these 4
