Quantreggers:

I'm trying to run rq() on a dataset I posted at:
https://docs.google.com/file/d/0B8Kij67bij_ASUpfcmJ4LTFEUUk/edit?usp=sharing
(it's a 1500kb csv file named "singular.csv") and am getting the following
error:

mydata <- read.csv("singular.csv")
fit_spl <- rq(raw_data[,1] ~ bs(raw_data[,i],df=15),tau=1)
> Error in rq.fit.br(x, y, tau = tau, ...) : Singular design matrix

Any ideas what might be causing this or, more importantly, suggestions for
how to solve this?  I'm just trying to fit a smoothed hull to the top of
the data cloud (hence the large df).

Thanks!

--jonathan


-- 
Jonathan A. Greenberg, PhD
Assistant Professor
Global Environmental Analysis and Remote Sensing (GEARS) Laboratory
Department of Geography and Geographic Information Science
University of Illinois at Urbana-Champaign
607 South Mathews Avenue, MC 150
Urbana, IL 61801
Phone: 217-300-1924
http://www.geog.illinois.edu/~jgrn/
AIM: jgrn307, MSN: jgrn307@hotmail.com, Gchat: jgrn307, Skype: jgrn3007

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