[R] Least Absolute Deviation

[Philippe Grosjean]

You can also look at package nlrq, if you intend to do non linear LAD
regression.

Best,

Philippe Grosjean

-----Original Message-----
From: r-help-admin at stat.math.ethz.ch
[mailto:r-help-admin at stat.math.ethz.ch]On Behalf Of Huntsinger, Reid
Sent: mercredi 15 janvier 2003 6:59
To: 'huan.huang at bnpparibas.com'; r-help at stat.math.ethz.ch
Subject: RE: [R] Least Absolute Deviation


Try the package "quantreg" on CRAN.

Reid Huntsinger

-----Original Message-----
From: huan.huang at bnpparibas.com [mailto:huan.huang at bnpparibas.com]
Sent: Wednesday, January 15, 2003 12:19 PM
To: r-help at stat.math.ethz.ch
Subject: [R] Least Absolute Deviation



Dear all,

I try to fit least absolute deviation  (LAD) regression with R. I couldn't
find any command to carry out LAD. What I am doing now is using nlm() and
setting the function argument to minimize the sum of the absolute
deviation. But for some data it keeps giving out the error message: Error
in nlm(absdev, b.start) : non-finite value supplied by nlm. (there is no na
in my dataset.)

I am wondering if there is some function I can do it directly.

Many thanks.

Huan




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