Hi,
I am trying to create a loess smooth from hydrologic data. My goal is to
create a smooth line that describes discharge at a certain point in time. I
have done this using the 'lowess' function and had no problem, but I'm
having some difficulty with loess. I am inputting the date ('date')
Well, you might start by reading the Help file for loess and
specifying the model via a formula, as described there.
The docs say your input is coerced to a formula -- but obviously not
the one you want. Specify it explicitly.
-- Bert
On Fri, Mar 18, 2011 at 8:34 AM, armstrwa
Yeah, I did look at the help(loess) page, but I wasn't really sure what to do
with that. I was inputting it as:
test-loess(date ~ q,data.frame(date,q),span=0.5)
test
Call:
loess(formula = date ~ q, data = data.frame(date, q), span = 0.5)
Number of Observations: 96
Equivalent Number of
Flip date and q in your formula, you've got them backwards from what you've
said you're trying to model.
armstrwa wrote:
Yeah, I did look at the help(loess) page, but I wasn't really sure what to
do with that. I was inputting it as:
test-loess(date ~ q,data.frame(date,q),span=0.5)
lt;!DOCTYPE html PUBLIC quot;-//W3C//DTD HTML 4.01 Transitional//ENquot;gt;
That would certainly help, haha.nbsp; Thank you for catching that error.nbsp;
Do you happen to know what exactly '~' means in R?
Thanks again.
Billy
nblarson [via R] wrote:
Flip date and q in your formula,
On Mar 18, 2011, at 4:00 PM, armstrwa wrote:
lt;!DOCTYPE html PUBLIC quot;-//W3C//DTD HTML 4.01 Transitional//
ENquot;gt;
That would certainly help, haha.nbsp; Thank you for catching that
error.nbsp;
Do you happen to know what exactly '~' means in R?
?formula
It separates the left
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