you are doing this inside { } you will need to do print(Function(f))
Note this is a simplified version of the rcs with 2 redundant terms to
avoid writing in terms of differences in cubes.
Frank
Sincerely,
sp
--- On Tue, 12/23/08, Frank E Harrell Jr wrote:
From: Frank E Harrell Jr
/23/08, Frank E Harrell Jr wrote:
> From: Frank E Harrell Jr
> Subject: Re: [R] newbie problem using Design.rcs
> To: to_rent_2...@yahoo.com
> Cc: "David Winsemius" , r-help@r-project.org
> Date: Tuesday, December 23, 2008, 4:57 PM
> sp wrote:
> > 2. I didn&#
f this is NOT a good way to test fitting, could you pls tell me a better way?
Respectfully,
sp
--- On Tue, 12/23/08, Frank E Harrell Jr wrote:
From: Frank E Harrell Jr
Subject: Re: [R] newbie problem using Design.rcs
To: "David Winsemius"
Cc: to_rent_2...@yahoo.com, r-help@r-project.org
t the regression curve differs from the actual
points by as high as 10^5 with 3 knots and roughly -10^5 with 4 knots as I make
y=x^2, y=x^3
If this is NOT a good way to test fitting, could you pls tell me a better way?
Respectfully,
sp
--- On Tue, 12/23/08, Frank E Harrell Jr wrote:
> Fr
In addition to David's excellent response, I'll add that your problems
seem to be statistical and not programming ones. I recommend that you
spend a significant amount of time with a good regression text or course
before using the software. Also, with Design you can find out the
algebraic for
On Dec 22, 2008, at 11:38 PM, sp wrote:
Hi,
I read data from a file. I'm trying to understand how to use
Design.rcs by using simple test data first. I use 1000 integer
values (1,...,1000) for x (the predictor) with some noise (x+.02*x)
and I set the response variable y=x. Then, I try rcs
Hi,
I read data from a file. I'm trying to understand how to use Design.rcs by
using simple test data first. I use 1000 integer values (1,...,1000) for x (the
predictor) with some noise (x+.02*x) and I set the response variable y=x. Then,
I try rcs and ols as follows:
m = ( sqrt(y1) ~ ( rcs(x1
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