Displaying 20 results from an estimated 20000 matches similar to: "How to write R data frame to HDFS using rhdfs?"
2013 Oct 09
1
How to write R data frame to HDFS using rhdfs?
Hello,
I am trying to write the default "OrchardSprays" R data frame into HDFS
using the "rhdfs" package. I want to write this data frame directly into
HDFS without first storing it into any file in local file system.
Which rhdfs command i should use? Can some one help me? I am very new to R
and rhdfs.
Regards,
Gaurav
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2011 Dec 09
1
Samba 3.0, fuse-hdfs and write problems
Hi folks,
I research at the moment a connection over fuse and samba for
hadoop-cluster. Its my private playground, but I have some issues I can't
figure out why they happen.
I use RHEL5.7, packetlist:
rpm -qa|grep samba
samba-3.0.33-3.29.el5_7.4.x86_64
samba-common-3.0.33-3.29.el5_7.4.x86_64
2 servers, one provides samba-shares and one I use as client.
Samba-Server (HOST2):
FuseFS:
2012 Feb 06
1
using file in hdfs for data mining algorithms in r
hi all, i am new to r , i am trying to run data mining algorithms using map
reduce framework.. *
*i have few basic doubts*
*1. can i give file in hdfs to kmeans( ) ? ?I tried as
> file1 = hdfs.file("testdata/synthetic_control.data")
> isf = hdfs.read(lsf,5242880,0)
>l = kmeans(isf,2,10)
its not working.. please help
2. How to access the file in hdfs and give as input to
2016 Apr 15
1
help on moving data from local to HDFS using RODBC in R
Hi,
I have requirement to move the data from Linux local path( ex
/home/user/sample.txt) to hadoop HDFS using RODBC in R
I knew that we can move the data using rhive comamnds like *rhive.put*
and *rhive.get
*but looking for similar commands using RODBC as well.
I would appreciate for your inputs.
Regards,
Divakar
Phoenix, USA
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2013 Sep 23
0
Unable to execute Java MapReduce (Hadoop) code from R using rJava
Hi All,
I have written a Java MapReduce code that runs on Hadoop. My intention is
to create an R package which will call the Java code and execute the job.
Hence, I have written a similar R function. But when I call this function
from R terminal, the Hadoop job is not running. Its just printing few lines
of warning messages and does nothing further. Here is the execution
scenario:
*>
2004 Nov 28
1
Is this a bug in the parser? (PR#7395)
# Your mailer is set to "none" (default on Windows),
# hence we cannot send the bug report directly from R.
# Please copy the bug report (after finishing it) to
# your favorite email program and send it to
#
# r-bugs@r-project.org
#
######################################################
<<insert bug report here>>
Is this a bug in the parser?
Specifically, the trace
2013 Oct 09
2
Error while running MR using rmr2
Hi,
I have trying to run a simple MR program using rmr2 in a single node Hadoop
cluster. Here is the environment for the setup
Ubuntu 12.04 (32 bit)
R (Ubuntu comes with 2.14.1, so updated to 3.0.2)
Installed the latest rmr2 and rhdfs from
here<https://github.com/RevolutionAnalytics/RHadoop/wiki/Downloads>and
the corresponding dependencies
Hadoop 1.2.1
Now I am trying to run a simple MR
2011 Sep 13
1
stupid lm() question
I feel bad even asking, but:
Rgames> data(OrchardSprays)
Rgames> model<-lm(decrease~.,data=OrchardSprays)
Rgames> model
Call:
lm(formula = decrease ~ ., data = OrchardSprays)
Coefficients:
(Intercept) rowpos colpos treatmentB treatmentC
22.705 -2.784 -1.234 3.000 20.625
treatmentD treatmentE treatmentF treatmentG treatmentH
2009 Jul 14
2
How to provide list as an argument for the data.frame()
Hi R -users,
i've a table as describe below. I'm reading the numeric value presented in this table to populate a list.
#table
#============
#X A B C
#x1 2 3 4
#x2 5 7 10
#x4 2 3 5
#============
rawData <- read.table("raw_data.txt",header=T, sep="\t")
myList=list()
counter=0
for (i in c(1:length(rawData$X)))
{
print (i)
2008 Aug 07
1
stripchart ignores main title option (PR#12202)
Full_Name: James Curran
Version: 2.7.1
OS: Windows XP/Vista
Submission from: (NULL) (130.216.51.81)
stripchart ignores the main title option. For example, in the documentation
stripchart(decrease ~ treatment,
main = "stripchart(OrchardSprays)",
vertical = TRUE, log = "y", data = OrchardSprays)
does not yield a plot with
2010 May 24
1
lattice 'scales' option help
Hi All,
I'm trying to draw boxplots. I'm having a hard time to get "ticks labels" on
multiple panels using 'alternating' option.
# R Code:
# May not be the best example, please just look into 'scales' option
library(lattice)
data(OrchardSprays)
dta <- subset(OrchardSprays, OrchardSprays$rowpos %in% c(1,2,3))
# Original
# This works fine, as you can see
2009 Apr 17
0
Margins in lattice and device resolution
Hi all,
I believe I've run into this before, but I seem to have totally
forgotten. No headway in the last couple of hours either. How do I
make sure that points and margins remain the same absolute size as I
change
the resolution of a device?
(I'm running 2.9.1 patched, on a Win XP-machine)
Many thanks in advance,
Gustaf
Ps: As an afterthought, might it be that this behaviour is
2011 Feb 10
1
Add different types of legend: line and points
Hello,
I plot box plot, and add a point to the box indicating mean. I also add some
range to the box width. I want to add legend for both the range (line) and
mean (point). However, I cannot add line legend and point legend together.
The code looks like the following.
(1) First, I tried the following code, however, it plot a line across the
point legend("*").
boxplot(count ~ spray,
2011 Jul 28
0
[LLVMdev] number of static paths
Hi, I am a student at IIT Kanpur. I am working on Path Profiling, i just
came with a need to know about the number of static paths in a
program(actually in a function) before it's actually get run. As i saw in
PathProfiling.c file in llvm\runtime\libprofile they are just storing the
path information at run time and dynamically adding entries for the new
path. But i need to know the number of
2013 Jan 16
1
How to call Java main method using rJava package?
Hi,
I am trying to integrate my Java program with R using rJava package. I want
to execute the whole Java program from R. The main() method in my Java code
calls all the other defined methods. So, I guess I have to call the main()
method in .jcall.
An example Java code:
*class A {
public static int mySum(int x, int y) {
return x+y;
}
public static void
2010 Mar 19
1
One main title and One legend for multiple lattice plots
Hi All,
Can anyone please help me with getting a "single title" and "legend" for
both the plots in the following R code. I'll eventually be using .wmf file.
# R code:
library(lattice)
p1 <- xyplot(decrease ~ treatment, OrchardSprays, groups = rowpos,
type = "a", main="Same title / legend",
auto.key = list(space = "right",
2002 Aug 13
1
interaction.plot() legend too narrow when mfcol > 2 (PR#1899)
Here is an example:
The legends (mainly the factor level names) are cut off on the
right. Somehow the internal calculation which computes
horizontal space for the legend is not flexible enough.
## Call a new graphics window {with default par()s !}:
get(getOption("device"))()
par(mfrow = c(2,2))
## part of example(interaction.plot) _improved_ using with() :
data(OrchardSprays)
2008 May 26
1
To draw observation [m, n] from 20 data frames named frame1, ... , frame20
Hi all,
I have 20 data frames, named frame1, ... , frame20. Each data frame has the
dimension 20x5. I need to build a function that calls out the observation in
Row 1, Col 2 from all 20 data frames and places it in a vector of length 20. I
have tried the following code:
vect <- rep(0,20)
for(i in 1:20){
vect[i] <- paste("frame",i,"[1,2]",sep="")
}
The
2016 Apr 22
1
Storage cluster advise, anybody?
Hi Valeri
On Fri, Apr 22, 2016 at 10:24 PM, Digimer <lists at alteeve.ca> wrote:
> On 22/04/16 03:18 PM, Valeri Galtsev wrote:
>> Dear Experts,
>>
>> I would like to ask everybody: what would you advise to use as a storage
>> cluster, or as a distributed filesystem.
>>
>> I made my own research of what I can do, but I hit a snag with my
>>
2013 May 03
1
print multiple plots to jpeg, one lattice and one ggplot2
hello everybody,
I want to print two plots in one png file, I tried several options but i
didn't succeed
the first plot (bwplot) print to the defined position, but the second
(ggplot) doesn't
Any idea?
Thanks a lot
Christophe
# Example:
#-------------------------------------
library(ggplot2)
library(lattice)
library(grid)
one <- bwplot(decrease ~ treatment, OrchardSprays, groups