Displaying 20 results from an estimated 400 matches similar to: "Fundamental formula and dataframe question."
2017 Jul 13
3
How to formulate quadratic function with interaction terms for the PLS fitting model?
I have two ideas about it.
1-
i) Entering variables in quadratic form is done with the command I
(variable ^ 2) -
plsr (octane ~ NIR + I (nir ^ 2), ncomp = 10, data = gasTrain, validation =
"LOO"
You could also use a new variable NIR_sq <- (NIR) ^ 2
ii) To insert a square variable, use syntax I (x ^ 2) - it is very
important to insert I before the parentheses.
iii) If you want to
2017 Jul 13
0
How to formulate quadratic function with interaction terms for the PLS fitting model?
Below.
-- Bert
Bert Gunter
On Thu, Jul 13, 2017 at 3:07 AM, Luigi Biagini <luigi.biagini at gmail.com> wrote:
> I have two ideas about it.
>
> 1-
> i) Entering variables in quadratic form is done with the command I
> (variable ^ 2) -
> plsr (octane ~ NIR + I (nir ^ 2), ncomp = 10, data = gasTrain, validation =
> "LOO"
> You could also use a new variable
2017 Jul 13
0
Quadratic function with interaction terms for the PLS fitting model?
> On Jul 13, 2017, at 10:43 AM, Bert Gunter <bgunter.4567 at gmail.com> wrote:
>
> poly(NIR, degree = 2) will work if NIR is a matrix, not a data.frame.
> The degree argument apparently *must* be explicitly named if NIR is
> not a numeric vector. AFAICS, this is unclear or unstated in ?poly.
I still get the same error with:
library(pld)
data(gasoline)
gasTrain <-
2017 Jul 13
2
Quadratic function with interaction terms for the PLS fitting model?
Dear all,
I am using the pls package of R to perform partial least square on a set of
multivariate data. Instead of fitting a linear model, I want to fit my
data with a quadratic function with interaction terms. But I am not sure
how. I will use an example to illustrate my problem:
Following the example in the PLS manual:
## Read data
data(gasoline)
gasTrain <- gasoline[1:50,]
## Perform
2017 Jul 13
4
Quadratic function with interaction terms for the PLS fitting model?
poly(NIR, degree = 2) will work if NIR is a matrix, not a data.frame.
The degree argument apparently *must* be explicitly named if NIR is
not a numeric vector. AFAICS, this is unclear or unstated in ?poly.
-- Bert
Bert Gunter
"The trouble with having an open mind is that people keep coming along
and sticking things into it."
-- Opus (aka Berkeley Breathed in his "Bloom
2017 Jul 16
2
How to formulate quadratic function with interaction terms for the PLS fitting model?
> On Jul 13, 2017, at 7:43 AM, Bert Gunter <bgunter.4567 at gmail.com> wrote:
>
> Below.
>
> -- Bert
> Bert Gunter
>
>
>
> On Thu, Jul 13, 2017 at 3:07 AM, Luigi Biagini <luigi.biagini at gmail.com> wrote:
>> I have two ideas about it.
>>
>> 1-
>> i) Entering variables in quadratic form is done with the command I
>>
2011 Jul 21
1
Error: bad index in plotmo functions for MARS model (package earth)
Hello all useRs,
I am tring make a simple surface plot ( 2 by 2 terms of a MARS model
(with earth package)
but I get the follow error message:
> plotmo( mars )
Error: bad index (missing column in x?)
I don't no how to workround this... :-(
I thanks in advanced by some help!
Thanks.
Cleber
###############
>
> ### example code:
> library( earth )
> data( gasoline,
2017 Jul 13
0
Quadratic function with interaction terms for the PLS fitting model?
> On Jul 12, 2017, at 6:58 PM, Ng, Kelvin Sai-cheong <kscng at connect.hku.hk> wrote:
>
> Dear all,
>
> I am using the pls package of R to perform partial least square on a set of
> multivariate data. Instead of fitting a linear model, I want to fit my
> data with a quadratic function with interaction terms. But I am not sure
> how. I will use an example to
2009 Oct 22
1
data frame is killing me! help
Usage
data(gasoline)
Format
A data frame with 60 observations on the following 2 variables.
octane
a numeric vector. The octane number.
NIR
a matrix with 401 columns. The NIR spectrum
and I see the gasoline data to see below
NIR.1686 nm NIR.1688 nm NIR.1690 nm NIR.1692 nm NIR.1694 nm NIR.1696 nm
NIR.1698 nm NIR.1700 nm
1 1.242645 1.250789 1.246626 1.250985 1.264189 1.244678 1.245913
2017 Jul 16
0
How to formulate quadratic function with interaction terms for the PLS fitting model?
??
If I haven't misunderstood, they are completely different!
1) NIR must be a matrix, or poly(NIR,...) will fail.
2) Due to the previously identified bug in poly, degree must be
explicitly given as poly(NIR, degree =2,raw = TRUE).
Now consider the following example:
> df <-matrix(runif(60),ncol=3)
> y <- runif(20)
> mdl1 <-lm(y~df*I(df^2))
> mdl2
2017 Jul 13
0
Quadratic function with interaction terms for the PLS fitting model?
Bert,
The 'degree' argument follows the "..." argument in the function declaration:
poly(x, ..., degree = 1, coefs = NULL, raw = FALSE, simple = FALSE)
Generally, any arguments after the "..." must be explicitly named, but as per the Details section of ?poly:
"Although formally degree should be named (as it follows ...), an unnamed second argument of length 1
2017 Jul 13
2
Quadratic function with interaction terms for the PLS fitting model?
Marc:
1. I am aware of the need to explicitly name arguments after ... --
see the R Language definition where this can be inferred from the
argument matching rules.
2. I am aware of the stated exception for poly(). However:
> x1 <- runif(20)
> x2 <- runif(20)
> mx <- cbind(x1,x2)
> poly(mx,2)
Error in poly(dots[[i]], degree, raw = raw, simple = raw) :
'degree'
2016 Jun 20
4
FireFox-46.0.1 build with interprocedural register allocation enabled
On Mon, Jun 20, 2016 at 10:06 PM, Davide Italiano <davide at freebsd.org>
wrote:
> On Sun, Jun 19, 2016 at 11:41 AM, vivek pandya via llvm-dev
> <llvm-dev at lists.llvm.org> wrote:
> > Hello,
> >
> > I build FireFox-46.0.1 source with llvm to test interprocedural register
> > allocation.
> > The build was successful with out any runtime faliures,
2017 Jul 12
0
How to formulate quadratic function with interaction terms for the PLS fitting model?
Dear all,
I am using the pls package of R to perform partial least square on a set of
multivariate data. Instead of fitting a linear model, I want to fit my
data with a quadratic function with interaction terms. But I am not sure
how. I will use an example to illustrate my problem:
Following the example in the PLS manual:
## Read data
data(gasoline)
gasTrain <- gasoline[1:50,]
## Perform
2016 Jun 20
2
FireFox-46.0.1 build with interprocedural register allocation enabled
On Mon, Jun 20, 2016 at 4:14 AM, Sanjoy Das <sanjoy at playingwithpointers.com>
wrote:
> Hi Vivek,
>
> [Dropping firefox-dev, since I don't want to spam them]
>
> vivek pandya via llvm-dev wrote:
> > Measure W/O IPRAWITH IPRA
> > ========================
> > Total Build Time76 mins82.3 mins8% increment
> > Octane v2.0 JS Benchmark Score (higher is
2007 Nov 29
1
extracting items from R objects and using them in \Sexpr with Sweave--problem with $
Running R 2.5.1 on WinXP with Tinn-R, and using Sweave via MikTex.
I am having trouble with the code below:
-------------------------------------------------------
<<lowerCI95>>=
lowerCI95713 <- t.test(data713, alternative="greater")
lowerCI95713.bound <- lowerCI95713$conf.int[1]
@
Thus a lower 95\% confidence bound on the mean octane concentration is
2017 Jul 13
0
Quadratic function with interaction terms for the PLS fitting model?
Hi Bert,
Ok, to your initial point, the key nuance is that if 'x' is a vector, you can leave the 'degree' argument unnamed, however, if 'x' is a matrix, you cannot. That aspect of the behavior does not seem to change if poly() is called stand alone or, as suggested in ?poly, within a formula to be parsed.
Working on tracing through the code using debug(), the error is
2016 Jun 20
2
FireFox-46.0.1 build with interprocedural register allocation enabled
On Mon, Jun 20, 2016 at 10:05 PM, Sanjoy Das <sanjoy at playingwithpointers.com
> wrote:
> Hi Vivek,
>
> vivek pandya wrote:
>
> > For Octane and Kraken I have run them 4 times and above result is
> > geometric mean. For Octane standard deviation (SD) is
> > 918.54 (NO_IPRA) and 597.82 (With_IPRA). For Kraken unfortunately I
> > don't have readings
2016 Jun 19
8
FireFox-46.0.1 build with interprocedural register allocation enabled
Hello,
I build FireFox-46.0.1 source with llvm to test interprocedural register
allocation.
The build was successful with out any runtime faliures, here are few stats:
Measure W/O IPRA WITH IPRA
======= ======== =========
Total Build Time 76 mins 82.3 mins 8% increment
Octane v2.0 JS Benchmark Score (higher is better) 18675.69 19665.16 5%
improvement
Kraken JS Benchmark time (lower is better)
2000 Sep 29
1
R for Irix 6.5 or lower
Good Day:
Has anyone successfully compiled R, especially R.1.1.1, for Irix 6.5 or
lower (an SGI octane machine) and if so, may I get a copy of it? Our
computer does not have all the requisite software for compiling R -- to wit,
a fortran compiler -- and there is insufficient demand here for R to warrant
purchasing a compiler from SGI. I am trying to spur demand for R here by
making it more