Hello,
Is it possible to execute functions (outside the ui and server shiny
environments) after reading data using reactiveFileReader() ?
For example, I'd like to fit a linear model on data read using
reactiveFileReader() outside ui/server.
library(shiny)
library(dplyr)
bigData <-
2,X_name)%>%
>> do(describe(.$X_value))
>>
>> ##To obtain only means of your data
>> df%>% gather(X_name,X_value,X1:X4)%>%
>> group_by(f1,f2,X_name)%>%
>> do(describe(.$X_value))%>%
>> select(mean)%>%# You select only mean value
>&g
Dear group,
Is there a way I could avoid the sort of duplication illustrated below?
i.e., I have the same dplyr::summarise function on different group_by
arguments. So I'd like to create a single summarise function that could be
applied to both. My attempt below fails.
df <-
Hi All,
I'd appreciate if you can point me to any good open source (and free)
Resource Manager for R installed on a unix server. Essentially, I'm looking
to have the ability to selectively allocate computational resources to
individuals or groups who have access to this server.
I understand R
NAs are not
allowed in subscripted assignments
In addition:
Warning message:
'newdata'
had 200 rows but variables found have 300 rows
On Sun, Jun 26, 2016 at 3:46 PM, David Winsemius <dwin
net>
wrote:
>
> > On Jun 26, 2016, at 11:32 AM, Lars Bishop <lars...@gmail.com> wrote:
> >
> > Thanks Bert.
> >
> > But I it doesn't complain when predict is used on X instead of X_new
> > (using nnet_7.3-12), which is even more puzzling to me:
> &g
r predict.nnet, at
> least in my version: nnet_7.3-12
>
> Cheers,
> 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 County"
Hello,
I'd appreciate your help in spotting the reason for the error and warning
messages below.
library(nnet)
set.seed(1)
ysim <- gl(3, 100)
y <- model.matrix(~ysim -1)
X <- matrix( 3 * runif(length(ysim)), nrow = 300, ncol = 3)
X_new <- matrix( 3 * runif(length(ysim)), nrow = 200, ncol = 3)
age. Perhaps
> there is a problem with R trying to read a different character set
> from that used in the package.
>
> Jim
>
> On Sat, Apr 30, 2016 at 8:22 PM, Lars Bishop <lars...@gmail.com
> <javascript:;>> wrote:
> > Hello,
> >
> > I can’t seem to be a
Hello,
I can’t seem to be able to install packages on a redhat-linux-gnu. For
instance, this is what happens when I try to install “bitops”. Any hint on
what might be the issue would be much appreciated.
> sessionInfo()
R version 3.2.3 (2015-12-10)
Platform: x86_64-redhat-linux-gnu (64-bit)
Hello,
I'm trying to plot a histogram (or alternatively the density) of a
variable, with a slider that displays a vertical line with the
corresponding quantile of the distribution of the variable. That is, I what
to interactivity pick for example, the median, and have the vertical line
move to
ad any of the profile files.
>
> https://stat.ethz.ch/R-manual/R-devel/library/base/html/Startup.html
>
> Sarah
>
> On Fri, Feb 26, 2016 at 12:01 PM, Lars Bishop <lars...@gmail.com> wrote:
> > Thank you Ulrik. I actually don't want to install SparkR, just don't want
>
vel/library/base/html/Startup.html
>>
>
> Another possibility is that SparkR defines some S4 classes, and you have
> an object of that type in your workspace. To read it might need SparkR
> installed.
>
> The solution here is to run R --vanilla as above, or to delete the obje
pkg and I haven't
> tried it myself.
>
> Hope this helps,
> Ulrik
>
> On Fri, 26 Feb 2016 at 17:40 Lars Bishop <lars...@gmail.com> wrote:
>
>> Hello,
>>
>> Just installed R version 3.2.3, and I'm getting the error message below
>> every time I start
Hello,
Just installed R version 3.2.3, and I'm getting the error message below
every time I start R. I had SparkR installed in the prior version. I
googled this problem, but didn;t find anything useful.
Any help would be very appreciated.
Error in library(SparkR) : there is no package called
e
first matrix (where the first level of “f1” is omitted in the resulting
matrix). This would’t happen if the user specifies the terms in reverse order
(as per the second matrix).
Thanks again,
Lars.
> On Jan 17, 2016, at 2:53 PM, Lars Bishop <lars...@gmail.com> wrote:
>
>
This is very helpful, thanks!
Lars.
> On Jan 17, 2016, at 1:34 PM, Charles C. Berry <ccbe...@ucsd.edu> wrote:
>
> On Sun, 17 Jan 2016, Lars Bishop wrote:
>
>> I’d appreciate your help on understanding the following.
>
>> It is not very clear to me from th
I’d appreciate your help on understanding the following.
It is not very clear to me from the model.matrix documentation, why simply
changing the order of terms in the formula may change the number of resulting
columns. Please note I’m purposely not including main effects in the model
formula
Hi All,
Apologies for the simple question, but I could not find a straightforward
answer based on my limited knowledge of survival analysis.
Iâm trying to obtain the predicted median survival time for each subject on
a new dataset from a fitted coxph{survival} or cph{rms} object. Would the
Hello,
I would like to show in my facet labels the equivalent in LaTex of
$\sigma_{0}= \sqrt{2}$. I think I'm close below, but not yet as it shows
$(\sigma_{0}, \sqrt{2})$
m - mpg
levels(m$drv) - c(sigma[0]=sqrt(2), sigma[0]=2 * sqrt(2), sigma[0]= 3
* sqrt(2))
ggplot(m, aes(x = displ, y = cty))
Dear list,
I'm most likely doing something wrong, but I'm getting an error message in
tab2 below (tab1 is fine). Any hint is much appreciated.
library(tables)
set.seed(1)
dd - data.frame(x = rnorm(100), f1 = gl(2, 50, labels = c(A, B)),
f2 = gl(4, 25, labels = c(a, b, c, d)),
Hello,
I'd like to produce a ggplot where the order of factors within facets is
based on the average of another variable.
Here's a reproducible example. My problem is that the factors are ordered
similarly in both facets. I would like to have, within each facet of `f1',
boxplots for 'x' within
Hello,
I'm trying to get familiar with the coin package for doing permutation
tests. I'm not sure I understand the documentation regarding the difference
between distribution = asymptotic and approximate in the function
independence_test. Are permutations of the test statistic actually computed
Hi,
Is it possible to use x and y below to produce the vector shown in
desired.result (which represents the values in y ordered according to
the order specified by x)? Ideally the solution must be efficient in
terms of timing as I'm dealing with *very* long vectors.
x - c(7, 6, 5, 9, 4, 14, 8,
Dear list,
I have an issue with placing the information stored in the file
mypackage-package.Rd file (as created by promptPackage(mypackage))
in the package manual pdf file.
The information on that .Rd file is not placed in the head of the
manual as I would expect. I think a possible reason is
Dear List,
Several times I use this package I get the error message shown below.
When I work out simple examples, it turns out to be fine, but when
working with real and moderate size data sets I always get the same
error.
Do you know what could be the cause of the problem?
Error in
commented, minimal, self-contained, reproducible code.
We can not help unless we at least have the data that you are using.
On Sat, Jul 30, 2011 at 3:01 PM, Lars Bishop lars...@gmail.com wrote:
Dear List,
Several times I use this package I get the error message shown below.
When I work out simple
-help-boun...@r-project.org]
On Behalf Of Lars Bishop
Sent: July-30-11 4:30 PM
To: jim holtman; r-help@r-project.org
Subject: Re: [R] Problem with effects package
ok. Here's an example:
R version 2.11.1
effects_2.0-10
var1 - c(25631.9392, 2521.2590, 6656.6516, 1362.5997, 6369.9818
Dear List,
I'd appreciate you guidance for obtaining the desired result shown
below, by combining tapply(x, g, mean) and g in the example.
Basically, I'm trying to create a vector whose values are based on the
result from tapply(x, g, mean) but that follow the pattern and length
given by the
Let's say I have the data frame 'dd' below. I'd like to select one
column from this data frame (say 'a') and keep its name in the
resulting data frame. That can be done as in #2. However, what if I
want to make my selection based on a vector of names (and again keep
those names in the resulting
Hi,
The penalized documentation says that Unordered factors are turned
into as many dummy variables as the factor has levels. This is done
by a function in the package called contr.none. I'm trying to figure
out how exactly is a model matrix created with this contrast option
when the user calls
Hi,
I need to build a function to generate one column for each level of a factor
in the model matrix created on an arbitrary formula (instead of using the
available contrasts options such as contr.treatment, contr.SAS, etc).
My approach to this was first to use the built-in function for
Hi,
I need to extract the second largest element from each row of a
matrix. Below is my solution, but I think there should be a more efficient
way to accomplish the same, or not?
set.seed(1)
a - matrix(rnorm(9), 3 ,3)
sec.large - as.vector(apply(a, 1, order, decreasing=T)[2,])
ans -
, Lars Bishop wrote:
Hi,
I need to extract the second largest element from each row of a
matrix. Below is my solution, but I think there should be a more
efficient
way to accomplish the same, or not?
set.seed(1)
a- matrix(rnorm(9), 3 ,3)
sec.large- as.vector(apply(a, 1, order
Dear R users,
Let's say I have a list with components being 'm' matrices (as exemplified
in the mylist object below). Now, I'd like to subset this list based on an
index vector, which will partition each matrix 'm' in 2 sub-matrices. My
questions are:
1. Is there an elegant way to have the
Dear List,
I've used R fr a while now, but I'm totally unfamiliar with the compiling
process. In particular, I'd like to compile R for AIX 5.3. servers. I'll
appreciate your guidance on the best place to get started on this.
Thanks in advance,
Lars.
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Hi,
I'm able to establish a successful odbc connection using RODBC 1.3-2 on Win
7 and R 2.12.0. But I'm getting the following error message when I try to
save a data frame into the debase as shown below.
library(RODBC)
bbdb - odbcConnect(bbdb)
odbcGetInfo(bbdb) # returns ok
sqlSave(bbdb,
Dear list,
When I use the predict.glm method on a glm fitted object, I get the
following warning message:
In addition: Warning message:
In predict.lm(object, x) :
prediction from a rank-deficient fit may be misleading
As the documentation says this happens if the fit is rank-deficient, some
Hi,
I'm running R 2.11.1 on Windows 32-bit. I fitted a glm to a large data set
with no problems (i.e., nothing is wrong with the created glm object).
However, when I try to use the effects package to plot the effects I get
the error message shown below. I get the same message if I try to plot a
Hi,
Maybe I'm missing the point here...but let's suppose you are working with
large data sets and using functions that take a significant amount of time
to run in R. I woulnd't like to run these functions every time I call
Sweave(myfile.Rnw) within R. What is the common practice to use Sweave
in
Hi,
I'll apreciate your guidance on how can I re-create the output from SAS PROC
VARCLUS in R. I've found the varclus function in Hmisc. However, is it
possible to use that function to compute for each variable the 1-R**2 ratio
(this is the ratio of 1 minus the R-squared with Own Cluster to one
Hi,
Is it possible to include class factor inputs in a Logistic Regression model
with the glmnet package? It only seems to allow for numeric inputs.
Looks like the Penalized package does this? Any other package you would
recommend for this purpose?
Thanks in advance for any help.
Lars.
Hi,
Is there any way I can see how exactly the prediction equation is
constructed in the example below? I'd like to be able to replicate the
predictions from the fitted gam object as given by the predict.gam method in
the package mgcv.
library(mgcv)
data(trees)
ct1 - gam(Volume ~ s(Height) +
Dear users,
The company where I work is considering getting a license for Revolution
Enterprise - Windows 64-bit. I'll appreciate for those familiar with the
product if can share your experiences with it? In particular, how does it
compare to the free version of R 64-bit?
Thanks in advance.
Hi,
I couldn't find a package to fit a penalized (lasso/ridge) Gamma regression
model. Does anybody know any?
Thanks in advance,
Lars.
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Dear R/LaTex user,
I'm simply trying to include a plot created with the Lattice wireframe
function into LaTex. I have no problems including other R plots into LaTex
by exporting as a Postcript and then including the graph in LaTex using
\begin{figure}
% Requires \usepackage{graphicx}
Dear R users,
Im trying to understand how correlated predictors impact the Relative
Importance measure in Stochastic Boosting Trees (J. Friedman). As Friedman
described
with single decision trees (referring to Briemans CART
algorithm), the relative importance measure is augmented by a
Hi,
I'm new in Latex and I'm trying to include an R chart into a Latex document.
This is what I'm doing:
1) In R: save the chart as a a Postcript in a folder C:/xxx/Density.eps
2) In Latex (using TexWorks on windows xp) :
In the preambule:
\documentclass[11pt]{article}
\usepackage{graphicx}
Dear R users,
Ive search the R site for help on this topic but it is hard to find a
precise answer for my questions.
Which are the best options to overcome the RAM memory limitation problems
when using R on large data sets (such as 2 or 3 million records)?
- Is the free available
Dear R experts,
The lrm function in the Design package can perform penalized (Ridge)
logistic regression. It is my understanding that the ridge solutions are not
equivalent under scaling of the inputs, so one normally standardizes the
inputs. Do you know if input standardization is done
Dear Experts,
I'm a new R user and I'll appreciate your help regarding the following. I'm
trying to generate an exhaustive search of all candidate models in a simple
linear regression and select the one with the lowest CV-error (or
alternatively the lowest Error on a Test set -- if I have lots of
Dear experts,
I have a few quick questions related to GLMs:
1) Suppose my response is of the type Yes/No, How can I control which
response I'm modelling?
2) How can I perform Type III tests? Is it with - drop1(mymodel,
test=Chisq) ?
3) I have a numerical variable which I converted to an
Dear experts,
I'm new in R and trying to learn by writing a version of the Perceptron
Algorithm. How can I tell in the code below to stop the iteration when the
condition in the for loop is not satisfied for all training examples?
Thanks in advance for your help!
## Generate a linearly
Dear experts,
I'm new in R. I'd like to know if I need to standarize the input variables
prior to using the nnet function or does this function standarizes the
variables internally?
In the first case, is there a fast way to standarize continuous and
categorical inputs?
Thanks
Lars.
Dear experts,
I'm attempting to solve a constrained optimization problem using the Rdonlp2
package.
I created a Lagrange function (L=f(x)-lambda(g(x)-c)), where x is a vector
of 16 parameters. This is what I'm using as objective function in the code
below. In addition, I set bounds on these
Dear R users,
Is there any package for Latent Class Analysis (to be used in a clustering
application) which supports mixed indicator variables (categorical and
continuous)?
Alternatively, is there any other clustering algorithm available that
supports this type of data?
Thanks in advance for
Dear R users,
I'd like to ask your guidance regarding the following two questions: (i) I
just finished reading Chris Bishop's book Neural Networks for Pattern
Recognition. Although the book gave me good theoretical foundation about
NN, I'm now looking for something more practical regarding
Hi,
Id appreciate your thoughts regarding the following. Im working with an
insurance data set with the objective of predicting a binary outcome (claim
or not). Policyholders in the sample are not observed for equivalent time
periods. I have an exposure variable that reflects the amount of
Dear All,
I couple of weeks ago, Ive asked for a package recommendation for nonlinear
optimization. In my problem I have a fairly complicated non-linear objective
function subject to one non-linear equality constrain.
Ive been suggested to use the *Rdonlp2* package, but I did not get any
Dear All,
I need to write 'n' functions on 'm' variables. The functions should be
constructed according to the values of an (nxm) matrix of '1/0' values as
follows. For example,
if row1 is equal to ,say [1 0 ...0 0] then f1 - (1+x1)
if row 2 is equal to, say [1 1 1 0...0 1] then f2
Hi,
I'm a new R user and would appreciate your help regarding the following: Can
I create a matrix whose elements are n functions of a vector x? In my
problem I have 3 vectors (a,b,c) with elements a=[f1(x) f2(x)fn(x)];
b=[g1(x) g2(x)gn(x)]; c=[h1(x) h2(x)hn(x)]. I need to create a
Hi All,
I'll appreciate your help on this. Do you know of any package that can be
used to solve optimization problems subject to general *non-linear* equality
constraints.
Thanks!
Lars.
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__
Hi,
Which package would you recommend for an implementation of EM for density
estimation (eg. mixture of Gaussian)?
Thanks!
Lars.
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Hi,
I was wondering if I can have some advice on the following problem.
Let's say that I have a problem in which I want to predict a binary outcome
and I use logistic regression for that purpose. In addition, suppose that my
model includes predictors that will not be used in scoring new
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