Dear Sir/Madam
I'm Working on a research project called "Dynamic price optimization" using
genetic algorithm to optimize product price's in an e-commerce store. I'm
doing this project using R language (package GA). I need help in defining a
Fitness function to optimize the products price. Can any
Thanks David! I'll take a look at zipfR.
Regards
Ben
On 05/07/2015 03:10 PM, David Winsemius wrote:
> On May 6, 2015, at 7:00 PM, Benjamin Tyner wrote:
>
>> Hi
>>
>> I'm wondering if anyone is aware of an R package implementing (i.e.,
>> providing a pdf, cdf, and/or quantile function) for the con
Thanks for the advice! I will continue to monitor the optimizer behaviour.
Jean
2015-05-07 17:03 GMT-07:00 William Dunlap :
> Your immediate problem may be solved, but the exact value of that limiting
> value
> affects the parameter estimates a fair bit. I have not really looked at
> your functi
I don't know what your work flow looks like, but I certainly do not equate
"writing R with functions" to "passing parameters at the command line".
Rather, these seem quite orthogonal to me. I often have one R file of
functions, and another R file where I source the first file and keep a record
Your immediate problem may be solved, but the exact value of that limiting
value
affects the parameter estimates a fair bit. I have not really looked at
your function,
but the ledge around it puts a kink (discontinuous first derivative) into
it, which can
mess up optimizers.
Bill Dunlap
TIBCO Sof
Yes, indeed! Problem solved!
Thanks a lot!
Jean
2015-05-07 14:06 GMT-07:00 William Dunlap :
> Your nLL function returns 1e+308 in near-boundary cases. Since 1e+308 is so
> close to machine infinity, it is easy to get into Inf-Inf (=NaN) or Inf/Inf
> (=NaN)
> situations when working with it. Tr
On Thu, 7 May 2015, Clint Bowman wrote:
as in source("pairwise-plots-continuous-vars.R")
Clint,
I did this before converting it to a function, when I modified the
variables in the script. Did not try it as a function, should have.
Thanks,
Rich
On Thu, 7 May 2015, Bert Gunter wrote:
See e.g. Chapter 10.4 in the "Intro to R Tutorial" on the "..." argument.
Bert,
Thanks. That was going to be my next step.
Much appreciated,
Rich
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## I think this is what you are looking for.
## Your download host seems to want to give me software, so I am not taking it.
tmp <- data.frame(y=rnorm(20), a=factor(rep(letters[1:4], each=5)))
tmp.aov <- aov(y ~ a, data=tmp)
summary(tmp.aov)
summary(tmp.aov, split=list(a=list(b=1, c=2, d=3)))
See e.g. Chapter 10.4 in the "Intro to R Tutorial" on the "..." argument.
The general idea is to define your function as:
myfun <- function (named_arguments,...)
{
# Some code
## now call your function as
pairwisePlot(some_named_arguments,...)
}
You would then call myfun with the ...'s replaced
?source
as in source("pairwise-plots-continuous-vars.R")
then
plotpairs(first,second,third,wise,title)
should get you going
Clint BowmanINTERNET: cl...@ecy.wa.gov
Air Quality Modeler INTERNET: cl...@math.utah.edu
Department of Ecology VOIC
Your nLL function returns 1e+308 in near-boundary cases. Since 1e+308 is so
close to machine infinity, it is easy to get into Inf-Inf (=NaN) or Inf/Inf
(=NaN)
situations when working with it. Try making that limiting value something
smaller,
like 1e+30, and you may have better luck.
Bill Dunlap
I'm starting to put code in multi-use functions rather than in individual
scripts and have not learned how to invoke the function from the command
line. If this information is in Norman Matloff's 'The Art of R Programming'
or Hadley Wickham's 'Advanced R' please point me to the proper place.
A follow-up to my yesterday's email.
I was able to make a reproducible example. All you will have to do is
load the .RData file that you can download here:
https://drive.google.com/file/d/0B0DKwRjF11x4dG1uRWhwb1pfQ2s/view?usp=sharing
and run this line of code:
nlminb(start=sv, objective = nLL, l
Dear Rxperts..
Thanks for your response. Below is the version on Windows 7 Enterprise
(64-bit) OS machine..Yes, I tried SASxport, foreign and Hmisc.. have used
SASxport before (not for writing to xpt though) and continue to have the
same write to sas transport file issue..
> version
On May 6, 2015, at 7:00 PM, Benjamin Tyner wrote:
> Hi
>
> I'm wondering if anyone is aware of an R package implementing (i.e.,
> providing a pdf, cdf, and/or quantile function) for the continuous
> binomial distribution? Specifically the one characterized here:
>
> http://www2.math.uni-paderbo
Dear R users,
I have data from a questionnaire and I want to estimate the individual
effect of each explanatory variable (all are qualitative) on the dependent
variable (continuous). However, the default is to consider the estimated
coefficients as the difference between the reference group (estim
When you want to get the individual impact of each level of a single
categorical explanatory variable on a variable continuous quantitative
response, simply add the value of the estimated coefficient to the
intercept or, more directly, just consider all levels of the categorical
variable in the reg
http://stackoverflow.com/questions/5963269/how-to-make-a-great-r-reproducible-example
You have not supplied anywhere near enough information. See the link above for
some suggestions.
John Kane
Kingston ON Canada
> -Original Message-
> From: ajao...@gmail.com
> Sent: Thu, 7 May 2015 10:
This is pretty sketchy. Perhaps some details might help.
arules is in what package?
Any code ?
Any data?
http://stackoverflow.com/questions/5963269/how-to-make-a-great-r-reproducible-example
John Kane
Kingston ON Canada
> -Original Message-
> From: krishnakanth...@outlook.com
> Sent:
Sorry, I see that I forgot the link:
http://stackoverflow.com/questions/5963269/how-to-make-a-great-r-reproducible-example
John Kane
Kingston ON Canada
> -Original Message-
> From: shivibha...@ymail.com
> Sent: Wed, 6 May 2015 22:32:37 -0700 (PDT)
> To: r-help@r-project.org
> Subject:
> -Original Message-
> From: R-help [mailto:r-help-boun...@r-project.org] On Behalf Of Santosh
> Sent: Wednesday, May 06, 2015 8:04 PM
> To: r-help
> Subject: [R] Convert csv to xpt file in R?
>
> Dear Rxperts..
>
> Was wondering if there is a way in R to read a csv file and generate an
>
On 07 May 2015, at 12:58 , khal sal wrote:
> I am getting this message after I installed R on MAC
> What should I do?
Consult the R for Mac OS X FAQ, I expect. Specifically Section 7,
Internationalization.
Notice that we cannot see what your locale settings are, and that your post has
been m
I am getting this message after I installed R on MAC
What should I do?
During startup - Warning messages:
1: Setting LC_CTYPE failed, using "C"
2: Setting LC_COLLATE failed, using "C"
3: Setting LC_TIME failed, using "C"
4: Setting LC_MESSAGES failed, using "C"
5: Setting LC_PAPER fai
Thanks John for the tip. I will use it and see what is the output. Also I
will share my analysis on R & then you can advice accordingly.
--
View this message in context:
http://r.789695.n4.nabble.com/MOnth-over-Month-Variance-in-tp4706873p4706923.html
Sent from the R help mailing list archive
I was trying to study arules in R and got stuck on this doubt:
How does arules code decide which column to be in LHS and which in RHS??
[[alternative HTML version deleted]]
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R-help@r-project.org mai
Hello,
I'm trying to create a table like below for a data set representing one
test and indexed by five categories.
Categories are grouped into a number of buckets (three in this case: A, B,
C) based on the level at which the difference between groups is significant
(0.05).
Category, Group, Me
On 2015-05-07 09:15, Jim Lemon wrote:
Hi Luis,
Try this page:
http://www.r-bloggers.com/cochran-q-test-for-k-related-samples-in-r/
Jim
Cochran's Q test is a marginal homogeneity test, and such tests can be
performed by the 'mh_test' function in the 'coin' package. The
following replicates
Two libraries are needed to run the code you submitted ...
library(dplyr)
library(sqldf)
Your IsHigh() function and its use can be replaced by a single line of code
isHighFlow <- as.numeric(Flow>=1600)
You are getting the additional hour by using cumsum(). One date element
which you seem to ch
Hi there,
I would like to conduct a mixture regression analysis with the flexmix
Package. Was just playing around with the function stepFlexmix() and did not
get a foot
into the door.
When I run the stepFlexmix-function, I get the following error (actually a
list of errors that repeats this sent
Hi Luis,
Try this page:
http://www.r-bloggers.com/cochran-q-test-for-k-related-samples-in-r/
Jim
On Thu, May 7, 2015 at 4:59 PM, Luis Fernando García
wrote:
> Dear R Experts,
>
> May be this is a basic question for you, but it is something I need really
> urgently. I need to perform a Chi Squa
Dear R Experts,
May be this is a basic question for you, but it is something I need really
urgently. I need to perform a Chi Square analysis for more than two groups
of paired observations. It seems to be ok For Cochran test. Unfortunately I
have not found info about this test in R, except for de
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