> On Apr 19, 2018, at 1:22 PM, David Winsemius wrote:
>
>
>> On Apr 19, 2018, at 11:20 AM, Ding, Yuan Chun wrote:
>>
>> Hi All,
>>
>> I want to create a categorical variable, cat.pfoa, in the file of pfas.pheno
>> (a data frame) based on log2pfoa values. I can do it using the following
>>
> On Apr 19, 2018, at 11:20 AM, Ding, Yuan Chun wrote:
>
> Hi All,
>
> I want to create a categorical variable, cat.pfoa, in the file of pfas.pheno
> (a data frame) based on log2pfoa values. I can do it using the following code.
>
> pfas.pheno <-within(pfas.pheno, {cat.pfoa<-NA
> cat.pfoa[pf
Hi Rui,
Thank you very much for your help!! It works very well, I got it.
Ding
-Original Message-
From: Rui Barradas [mailto:ruipbarra...@sapo.pt]
Sent: Thursday, April 19, 2018 11:35 AM
To: Ding, Yuan Chun ; r-help@r-project.org
Subject: Re: [R] create multiple categorical variable
Hello,
When programming it is better to use dat[["variable"]] than dat$variable.
So your code could be
pfas.pheno[[cat.var]] <- NA
pfas.pheno[[cat.var]][pfas.pheno[,i] <= quantile(pfas.pheno[,i],0.25,
na.rm =T)] <- 0
etc.
Untested.
Hope this helps,
Rui Barradas
On 4/19/2018 7:20 PM, Ding
Hi All,
I want to create a categorical variable, cat.pfoa, in the file of pfas.pheno (a
data frame) based on log2pfoa values. I can do it using the following code.
pfas.pheno <-within(pfas.pheno, {cat.pfoa<-NA
cat.pfoa[pfas.pheno$log2pfoa <=quantile(pfas.pheno$log2pfoa,0.25, na.rm
=T)]<-0
c
A few years ago I gave two 5-hour workshops about R to a class of US high
school students in a somewhat-accelerated science research class (so these
were already science-motivated kids). They had been using mainly Excel,
and some SPSS for which the school had a license. Overall they seemed to
lik
Hi,
I think he's talking about how much a statistical estimator is influenced by
extreme datapoints, e.g.
https://en.m.wikipedia.org/wiki/Robust_statistics#Breakdown_point
Olivier
--
Olivier Crouzet
Assistant Professor
@LLING UMR6310 - Université de Nantes / CNRS
Guest Scientist
@UMCG - Uni
Hello,
You can process several files at a time with repeated use of *appy
functions. Something like the following (not tested).
# This first instruction may not be needed
old_dir <- setwd("path/to/txt/files")
# Get the filenames in a vector and read them in
txt_files <- list.files(pattern =
Dear Lorenzo,
First of all I would focus on topics which immediately usable by your
audience. E.g. making figures and tables based on preprocessed data
files (txt, Excel, GoogleSheets, data base query, ...). And pick
examples in which the definition of the figures and tables remains
more or less s
I need your help because I am having difficulties to finalize an econometric
model.By the way, I want to calculate the standard error with delta method in a
2sls model with interactions under R.I want to determine the total effect of
the institutions (Institutions + D_MinMond * Institutions) on
Hi David,
Thank you for your suggestion- I will look into it some more.
Thanks again,
Hannah
On Wed, Apr 18, 2018 at 5:09 PM, David Winsemius
wrote:
>
> > On Apr 18, 2018, at 1:04 AM, Hannah Meredith
> wrote:
> >
> > Hello,
> >
> > I am solving a set of ODEs using deSolve and have run into a
On 15/04/2018 17:26, Marc Girondot via R-help wrote:
Le 15/04/2018 à 17:56, alireza daneshvar a écrit :
break-down point
Can you explain more what you plan to do and give an example of what you
have tried to do until now to do a "break down point" in R. Perhaps a
"break down point" is common
Farnoosh I want to start by appreciating your reply. Thank you so much.
I am waiting to know your plan why not give me pic
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Hi all,
I am looking for syntax to read a list of *txt files, (loop through?)
each with a different data content but same fields, then run lines of
code to produce summary stats (I have working code for this) and add the
matching data file name when writing the results of a line of R code.
S
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