Displaying 20 results from an estimated 3000 matches similar to: "zeros keep dropping"
2009 Nov 05
3
performing operations on a dataframe
Hey all,
I feel like the solution to this problem should be relatively simple, but
for some reason I can't find answers or come up with my own solution.
Given the dataframe:
(SpA and SpB not important, want to look at distribution of cooccurance for
each year)
Year SpA SpB Coocc
2000 0
2000 2
2000 1
2001 8
2001 2
2001 0
2001 0
2002 1
2002 2
How can I apply different functions to
2009 Nov 06
1
using xyplot to plot frequencies
Hi all,
First off, thank you for the overwhelming response last time. I'm still
trying to figure out the syntax of R to plot some distributions of some
frequencies. I've managed to plot histograms from the data, but I would
like to clean it up using xyplot from library(lattice). Unfortunately
I cannot find a solution to my problem.
Given a dataframe "all2", with numerical
2010 May 04
2
R for web browser
Hi Everyone,
Does anyone know of any projects for running an interactive R session within
a web browser?
I'm looking for something similar to the one on the Ruby website
(http://tryruby.org), except for R.
Thanks for your responses in advance!
Lanna
-----
Lanna Jin
lannajin at gmail.com
510-898-8525
--
View this message in context:
2010 Mar 10
2
function to create multiple matrices
Hi All,
If given a dataframe (long form) with Year, Species, and Location,
How would I write a function that would create a unique matrix of Species &
Location for each Year?
What I've tried doing is the following:
data #dataframe
dataT<-table(data$Species,data$Location,data$Year) #creates tables of
Species vs Location for each Year
But I'm encountering issues individually
2010 Mar 16
1
nested looping functions and dataframes
Hey All,
So, I am confused how exactly to use nesting loop functions in R to spit out
data frames. I've managed to create a working function for my data set that
generates a data frame for a given set of Year i and Location j; but how
would I do it for all Years and Locations?
Here is my working function:
test<-function(i,j){
a<-x[which(x$Year==i & x$Location==j),]
2011 Nov 07
2
adjusting levelplot color scale to data
Hi guys,
I have a matrix with values varying from approximately -0.7 to 0.33 that I
want to create a heatmap/levelplot with.
When I execute the levelplot function for my matrix, I end up getting colors
that are adjusted to the max and min rather than around 0. In other words,
ideally I would like to have a color ramp that goes from red (negative
number), to white (0), to blue (positive);
2012 Mar 29
1
Retrieving matrix column and row names by index value
Hi all,
So let's say I have a matrix, mdat and I only know the index number. How do
I retrieve the column and row names?
For example,
> mdat <- matrix(c(1,2,3, 11,12,13), nrow = 2, ncol=3, byrow=TRUE,
dimnames = list(c("row1", "row2"),
c("C.1", "C.2", "C.3")))
> mdat[4]
[1] 12
>
2010 May 04
7
How to replace all <NA> values in a data.frame with another ( not 0) value
I need to replace <NA> occurrences in multiple columns in a data.frame
with "000/000"
how do I achieve this?
Thanks
Nevil Amos
2010 May 03
8
Delete rows with duplicate field...
as a r noob i am having another problem:
i have a big dataframe where each row corresponds to one entry and each
column is a field...
for instance, i have the column ID and time and many more...
Id like to get a dataframe where all IDs are just included once (some users
with that ID might have several entries but Id like to kepp only one)..
when i use unique I only get a list of the levels (or
2003 Jun 25
2
probelem of function inside function
Hi,
I encountered a problem when I am trying to write my
own function which contains another function. To
simplify a problem, I tried the following simplified
function, hope someone can idenfity the problem for
me.
I have a simple data frame called "testdata" as
following:
>
2010 May 17
2
Variable variables using R ... e.g., looping over data frames with a numeric separator
Hello,
I have programmed in PHP a lot, and wanted to know if anyone figured out
Variable variables using R.
For example, I have several dataframes of unequal sizes that relate to L
treatments (1, 2, 3, 4, 5,6, L) ... in this case L=7
fData.1
unique.1
fit.nls.1
summary.nls.1
fit.var.1
summary.var.1
.....
fData.2
unique.2
fit.nls.2
summary.nls.2
fit.var.2
summary.var.2
.....
fData.L
unique.L
2013 Mar 25
3
Obtaining the internal integer codes of a factor XXXX
Hi everyone,
I understand the process of obtaining the internal integer codes for
the raw values of a factor (using as.numeric() as below), but what is
the best way to obtain these codes for the levels() of a factor (since
the as.numeric() results don't really make clear which code maps to
which level)?
2007 Sep 17
2
vector name
I have got a list named "filtered", I would like to construct alist named
"fdata" as following:
fdata <- cbind(matrix(unlist(filtered),ncol=28), myregime)
If I try names(filtered), it gives all the correct name for each vector, but
if I try names(fdata), it appears "filtered[[1]]" "filtered[[2]]" ...,
How can I keep the name in "fdata"?
2001 Dec 13
2
k-means with euclidian distance but no coordinates
Hi,
I'm trying to build a thesaurus that will sensible values for rare words.
I suspect the best algorithm to use is k-means although I'm not sure about
that -- I would have preferred a k dimensional space with a binary cluster
in each dimension so a word can belong to 0..k clusters, but I digress...
I can measure the strength of correlation between words fairly easily by
counting
2005 Mar 08
2
problem in compiling openh323
hello all
i am having a problem in compiling openh323.
[root@kamran openh323]# ./configure
checking for g++... g++
checking for C++ compiler default output... a.out
checking whether the C++ compiler works... yes
checking whether we are cross compiling... no
checking for suffix of executables...
checking for suffix of object files... o
checking whether we are using the GNU C++ compiler...
yes
2010 Nov 08
1
try (nls stops unexpectedly because of chol2inv error
Hi,
I am running simulations that does multiple comparisons to control.
For each simulation, I need to model 7 nls functions. I loop over 7 to do
the nls using try
if try fails, I break out of that loop, and go to next simulation.
I get warnings on nls failures, but the simulation continues to run, except
when the internal call (internal to nls) of the chol2inv fails.
2009 Jun 23
2
Weighting column entries in a data frame
Hi Guys,
I would like to weight column entries in a data frame by the population of
each state. For example, here is some data:
state statenum year income popul
ALABAMA 1 1 9.703193 3973.00
ALABAMA 1 2 9.745950 3992.00
ALABAMA 1 3 9.762092 4015.00
ALASKA 2 1 10.221640 532.00
ALASKA 2 2 10.169600
2009 Jan 21
1
problem with rbind
Hi All,
I have a problem with rbind.
I have data that consist of weight height .. etc of 1000 patients. I would
like to find the mean and the standard deviation ( for the weight , height
etc) for each gender.
data<-read.table("data.txt", header=T, sep='\t')
fdata=NULL
for (i in 1:50){
nn<-names(X)[i]
m<-tapply(X[,i],data$gender,mean,na.rm=T)
s<-tapply(X[,i],
2004 Dec 19
2
OH323 channel compile error
Hello
I am trying to compile asterisk-oh323-0.7.0 with pwlib-Janus_patch4
and openh323-Janus_patch4 downloaded from inaccessnetworks so I did
this:
tar -zxvf openh323-Janus_patch4-src-tar.gz
cd openh323
patch -p1 < /root/asterisk-oh323-0.7.0/openh323_1.13.5-make.patch
./configure
make opt
cd asterisk-oh323-0.7.0
vi Makefile (to set the paths and options according to my system...)
NOW I
2020 Sep 15
2
[ELF] String literals don't obey -fdata-sections
Hi there,
When I compile my code with -fdata-sections and -ffunction-sections, I
still see some unused string in my shared library (Android). Actually,
the strings appear together inside a .rodata.str1.1 section instead of
getting their own section. It seems that the C-string literal are
considered differently than other constant and the -fdata-sections is
not respected in