Hello,
It really helped.
Thanks.
On Mon, Sep 18, 2023 at 11:46 PM Rui Barradas wrote:
> Às 18:45 de 18/09/2023, mohan radhakrishnan escreveu:
> > Hello,
> >
> > I am attempting to port the R code which is an answer to
> >
> https://codegolf.stac
Hello,
I am attempting to port the R code which is an answer to
https://codegolf.stackexchange.com/questions/194229/implement-the-2d-hadamard-transform
function(M){for(i in 1:log2(nrow(M)))T=T%x%matrix(1-2*!3:0,2)/2; print(T);
T%*%M%*%T}
The code, 3 inputs and the corresponding outputs are
Hi,
I came across this project(http://jwijffels.github.io/RMOA/) which
seems to be directly addressing streaming prediction.
From the manual :
A data stream environment has different requirements from the traditional
setting. The most significant are the following:
Requirement 1 Process
Hi,
You could ask the author or post an issue here .(
https://github.com/s-u/rJava)
I had faced a problem and I got a response from him.
In my case I am streaming JVM data and this(
http://www.openanalytics.eu/r-service-bus) may be a better idea. I haven't
still tried this.
Thanks,
Does this shed some light on advanced R that ML tools h2o use ? MapR could
also be using distributed R.
Thanks,
Mohan
On Mon, Sep 29, 2014 at 9:43 PM, John McKown john.archie.mck...@gmail.com
wrote:
Thanks for the heads up. I just ordered it. Curiously, I can't read it
using the Cloud Reader
Hi,
I have trained my data using two models(gbm and rf). I get the accuracies
shown below.
How does one get the aggreement accuracy% ? Is that the comparison of the
two confusion matrices ?
Confusion Matrix and Statistics
Reference
Prediction 1 2 3 4 5 6 7 8 9 10 11
I am also wondering how the Accuracy reported by the confusion matrix for
gbm and rf could vary with the type of machines. The seed is the same. What
other factors could affect the accuracy ? library is caret.
Thanks,
Mohan
On Thu, Sep 25, 2014 at 2:30 PM, Mohan Radhakrishnan
radhakrishnan.mo
Hi,
Are these free ? :-)
Thanks,
Mohan
On Wed, Sep 24, 2014 at 1:46 PM, Martin Maechler maech...@stat.math.ethz.ch
wrote:
Rolf Turner r.tur...@auckland.ac.nz
on Wed, 24 Sep 2014 18:43:34 +1200 writes:
On 24/09/14 17:31, Mohan Radhakrishnan wrote:
Hi,
I
2014 09:17
To: Rolf Turner
Cc: R-help@r-project.org; r-sig-rob...@r-project.org
Subject: Re: [R] Median of streaming data
Rolf Turner r.tur...@auckland.ac.nz
on Wed, 24 Sep 2014 18:43:34 +1200 writes:
On 24/09/14 17:31, Mohan Radhakrishnan wrote:
Hi,
I have
Hi,
I have streaming data(1 TB) that can't fit in memory. Is there a
way for me to find the median of these streaming integers assuming I can
fit only a small part in memory ? This is about the statistical approach to
find the median of a large number of values when I can inspect only a
be nice too).
I suspect that Dennis is correct. Try using more normal syntax without the
$ indexing in the formula. I wouldn't say it is (absolutely) wrong but it
doesn't look right either.
Max
On Wed, Sep 17, 2014 at 2:04 PM, Mohan Radhakrishnan
radhakrishnan.mo...@gmail.com wrote:
Hi
- predict(preProc, test2)
modelFitpca - train(training1$diagnosis ~ .,method=glm,data=trainpca)
confusionMatrix(test1$diagnosis,predict(modelFitpca, testpca))
Mohan
On Thu, Sep 18, 2014 at 12:43 PM, Mohan Radhakrishnan
radhakrishnan.mo...@gmail.com wrote:
Oh. I understand now. There is nothing
I answered this question which was part of the online course correctly by
executing some commands and guessing.
But I didn't get the gist of this approach though my R code works.
I have a training and test dataset.
nrow(training)
[1] 251
nrow(testing)
[1] 82
head(training1)
diagnosis
as covariates.
Dennis
On Tue, Sep 16, 2014 at 11:15 PM, Mohan Radhakrishnan
radhakrishnan.mo...@gmail.com wrote:
I answered this question which was part of the online course correctly by
executing some commands and guessing.
But I didn't get the gist of this approach though my R code works
or integer.
Dennis
On Sat, Sep 13, 2014 at 12:53 PM, Mohan Radhakrishnan
radhakrishnan.mo...@gmail.com wrote:
Hi,
This is the code to create a ggplot. The plot is rendered but the y-axis
labels are not continuous. So the lines are split.
Moreover multiple y-axis labels overwrite each other
guessing value is a factor. It needs to be numeric or integer.
Dennis
On Sat, Sep 13, 2014 at 12:53 PM, Mohan Radhakrishnan
radhakrishnan.mo...@gmail.com wrote:
Hi,
This is the code to create a ggplot. The plot is rendered but the y-axis
labels are not continuous. So the lines are split
I have more control over labels using David's suggestion.
scale_y_continuous(breaks=seq(min(df.melted$value)-2,max(df.melted$value),by=170)
Thanks,
Mohan
On Mon, Sep 15, 2014 at 10:14 AM, Mohan Radhakrishnan
radhakrishnan.mo...@gmail.com wrote:
options(scipen=100, digits=4
Hi,
This is the code to create a ggplot. The plot is rendered but the y-axis
labels are not continuous. So the lines are split.
Moreover multiple y-axis labels overwrite each other due to this. How can I
fix this?
If I try to set ylim I get
*Discrete value supplied to continuous scale*
This too.
Applied Predictive Modeling
Max Kuhn • Kjell Johnson
Thanks,
Mohan
On Tue, Sep 9, 2014 at 10:03 PM, Subba Rao raspb...@tanucoo.com wrote:
Hi,
I am interested in R programming in the Big Data space. Are there any
books that would be a good starting point for this career path?
Hi,
I code R to parse data but not for solving equations. So this is
my first such problem. It is a programming puzzle.
I have these two equations.
1)4x - 3w = 0
2)8x - 7w =0
I know the value of x and w for
equation 1). x = 3 and w = 4
equation 2). x = 7 and w = 8
I also
.
Mohan
On Mon, Sep 8, 2014 at 12:31 AM, Rui Barradas ruipbarra...@sapo.pt wrote:
Hello,
Inline.
Em 07-09-2014 09:54, Mohan Radhakrishnan escreveu:
Hi,
I code R to parse data but not for solving equations. So this is
my first such problem. It is a programming puzzle.
I have
Hi,
I am not relating this to shiny but this error was thrown by my
shiny server code. Does it have anything to do with low memory settings ?
I am spawning a JVM using rJava. That JVM is using the attach API to
connect to another JVM
Thanks,
Mohan
Error: C stack usage 140730070087404 is
The latest code I have put together is this. Could you point out what is
missing here ?
#Reference values plotted on x-axis. These are constant.
#These values could be time of day. So every day at the same
#time we could collect other measurements
referenceset -
Hi,
Basic question with basic code. I am simulating a set of
'y' values for a standard 'x' value measurement. So here the error bars
are very long because the
number of samples are very small. Is that correct ? I am plotting the mean
of 'y' on the 'y' axis.
Thanks,
Mohan
x
Thanks. It is very useful.
Mohan
From: Hadley Wickham h.wick...@gmail.com
To: mohan.radhakrish...@polarisft.com
Cc: R-help r-help@r-project.org
Date: 11/20/2013 06:46 PM
Subject:Re: [R] Functional Programming patterns
I have some notes on functional programming in R at
Hi,
'
Not specific to 'R'. I search for patterns and found
http://patternsinfp.wordpress.com/ which is too heavy for me. There is a
'Pragmatic Programmer' book on such patterns for Scala and Clojure. Is
there anything for R ?
I wanted to code this. Is there a functional pattern in R for
Hi,
I am trying to show time( HH:MM:SS) in my x-axis. I have these
two questions.
1. The error in the code is
Error in axis(1, at = data$Time, labels = data$Time, las = 2, cex.axis =
1.2) :
(list) object cannot be coerced to type 'double'
Should I use 'POSIXCt' or 'strptime' ?
Hi,
I have been exploring graph dashboards like
http://sematext.com/img/products/spm/spm-solr-overview.png. I use R but
haven't attempted to create a
dashboard like this. I am thinking of parsing logs and showing dynamic
logs - logs that fit into a small window but move left or right
=Time(Every 200 Seconds))
points(data$Time,as.numeric(data$Committed),
col=orangered,pch=16,lwd=2,
cex.lab=1.2,cex.axis=1,type=b)
points(data$Time,as.numeric(data$Max),
col=palevioletred3,pch=16,lwd=2,
cex.lab=1.2,cex.axis=1,type=b)
dev.off()
Jim
[attachment mk.png deleted by Mohan
Hi,
When I plot 3 curves with the same x-axis and same y-axis, the first two
curves honor the y-axis but the last one doesn't. When I remove yaxt=n
for the last curve a new scale appears on the y-axis along with the scales
that the first two curves use. I want all curves to use the same y-axis
Hi,
I changed the code. The first two curves seem to plot properly without
the 'ylim'. 'ylim' doesn't allow the first two curves to plot properly.
It doesn't have any effect on the 3rd curve.
Hi,
How do we extract the numbers into an array or data frame assuming the
rows of text is in a data frame ?
head(a)
Col1
1 Current Usage : init:2359296
used:15857920,committed:15892480,max:50331648|
2 Current Usage : init:2359296
used:15857920,committed:15892480,max:50331648|
The
Please ignore. This works.
str_extract_all(a$Col1,[0-9]+(,|/|))
Mohan
From: mohan.radhakrish...@polarisft.com
To: arun smartpink...@yahoo.com
Cc: R help r-help@r-project.org
Date: 11/04/2013 12:22 PM
Subject:Re: [R] Replace element with pattern
Sent by:
Hi,
I have a data frame with one column and several rows of the form.
Peak Usage: init:2359296, used:15859328, committed:15892480,
max:50331648Current Usage : init:2359296, used:15857920,
committed:15892480, max:50331648|---|
I tested the regex
Current.*?[\|]
Thanks.
I converted my data structure( that is most of the confusion in my case )
into a data frame and then applied this function
y - apply( y, 1, function(z) str_extract(z,Current.*?[/|]))
to get
Current Usage : init:2359296, used:15857920, committed:15892480,
max:50331648|
Mohan
From:
Hi,
I came across this type of growth rate(
http://data.princeton.edu/eco572/grdt.html ) analysis. But I have the
number of user sessions as a plot of numbers varying over time. There are
two curves. and the second curve has more sessions but they vary over
time. Users login and
Hi,
This is not a sophisticated statistics question as the subject
suggests. But I am logging data - number of user sessions in a web
application - before and after new users are migrated. I use R to graph
but I am looking for a way to quantify the growth in the number of user
sessions.
Hi,
I have been using R for a few months and I have this working
code. Don't seen any problem but this takes a long time. So if I have
about 3 rows it takes a few minutes. If I have 10 it does not seem
to complete.
Original Data:
Proto Recv-Q Send-Q Local-Address
I attached a graph and it is not allowed. So the data is here.
Var1 Freq
1 10.1.17.10 205
2 10.1.17.15 216
3 10.1.17.17 79
4 10.1.17.23 76
5 10.1.17.24 209
6 10.1.17.5 244
7 10.1.17.6 178
8 10.1.17.7 165
9 10.1.17.8 146
10
Hi Jim
1. I use a bigger font using 'cex' but that worsens
because tick marks are close
2. A wider png is also insufficient.
The first tick is slightly away from the origin. I should be able to move
it closer and then stagger the ticks. What is the 'staxlab'
' but
there are less examples. Are there better references ?
Odd. If you do what I told you, you get the attached plot. It works the
same for a PNG image.
Jim
[attachment mk.pdf deleted by Mohan Radhakrishnan/BSC31/polarisFT]
This e-Mail may contain proprietary and confidential information
Hi,
I am trying to clearly show the values in the x-axis in the
attached graph. The tick marks are too close and the labels are blurred.
plot(as.numeric(data$Var1),data$Freq,ylim=c(0,700),col=green,type=o,ylab=Number
of connections,las=2,lwd=2.5,xaxt=n,xlab=IP)
Looks like graph cannot be attached.
Mohan
From: mohan.radhakrish...@polarisft.com
To: r-help@r-project.org
Date: 09/25/2013 12:41 PM
Subject:[R] Space between x-axis ticks
Sent by:r-help-boun...@r-project.org
Hi,
I am trying to clearly show the values in
Hi,
Sometimes I get a graph like the attached one. The data type could
have something to do with it. This graph does not use the color and does
not draw
a line. Earlier I used to convert the factors in the data frame to another
data type and drew the correct graphs.
Any idea why this
Hi,
Yes. It worked. Is 'stringAsFactors=FALSE' the switch to use
when reading data into a frame ? All the values I use are either numbers
or dates or strings. Sometimes while I manipulate the data by filtering,
the values seem to become factors ?
Thanks,
Mohan
From: Jim Lemon
Replying with some code.
input- readLines(textConnection(
6.2 httpd (18)
4.0 httpd (11)
4.0 httpd (11)
3.3 httpd (9)
4.2 httpd (12)
4.2httpd (12)
4.2 httpd (12)
4.2 httpd (12)
4.2 httpd (12)
))
data-input[input!=]
data
[1] 6.2 httpd (18) 4.0
Hi,
I would like to understand how to draw a graph to find out the
average memory used by a single httpd process given these details
collected over a period of
several days. I code R but this is about a method to find an average
memory utilization. I believe I have enough data.
How
Hi,
I am able to create a graph with this code but the decimal
numbers are not plotted accurately because the ylim values are not set
properly. x-axis is proper.
How do I accurately set the ylim for duration.1 column ?
Thanks,
Mohan
set1$duration- as.POSIXct(paste('2013-08-24',
Hi,
set1$duration.2- as.POSIXct(paste('2013-08-24', set1$duration))
plot(set1$duration.2,set1$duration.1,type=b,col = blue, ylab=, xaxt
= 'n', xlab=,las=2,lwd=2.5, lty=1,cex.axis=2.5)
# now plot you times
axis(1, at = set1$duration.2, labels = set1$duration, las =
2,cex.axis=2.5)
Hi,
I have tried the ideas with an actual data set but couldn't
pass the parsing phase. The name of the 'Program' varies. MiB and KiB are
both included.
I should have shown the real-time data set.
Private + Shared = RAM used Program
84.0 KiB + 14.5 KiB = 98.5
Hi,
I haven't tried the code yet. Is there a way to parse this data
using R and create bar plots so that each program's 'RAM used' figures are
grouped together.
So 'uuidd' bars will be together. The data will have about 50 sets. So if
there are 100 processes each will have about 50
Hello,
This memory usage should be graphed with time. Are there
examples of scatterplots that can clearly show usage vs time ? This is
for memory leak detection.
Thanks,
Mohan
From: PIKAL Petr petr.pi...@precheza.cz
To: mohan.radhakrish...@polarisft.com
Hi,
The plot function draws a broken line. The graph breaks when it jumps
from a lower value to a higher value with a big break in between. Why does
this type of data not use 'pch' or 'type'.
When I plot I don't indicate anywhere it is time.
head(data)
Time Kbytes RSS Dirty
Hi Jannis,
I have tried that. It doesn't work. Jumps are not there in my other graphs
using numbers. Does this anything to do with time series ?
Can I just convert this time representation into milliseconds and plot the
graph ? The x-axis should still show this time format though(names.arg ?
Hi,
plot(strptime(data$Time,%H:%M:%S),data$Kbytes,type=l,col = blue,
ylab=, xlab=,las=2,lwd=2.5, lty=1,cex.axis=1.5)
strptime functions draws a proper graph but now all the time values are
not in the x-axis.
1 11:42:02 2691296
2 11:43:42 2691396
3 11:45:22 2691496
4 11:47:02 2691596
5
Hi,
plot(strptime(data$Time,%H:%M:%S),data$Kbytes,pch=0,type=b,col =
red, col.axis=red, ylab=, xlab=,las=2,lwd=2.5,cex.axis=1.5)
title(,cex.main=3,xlab=Seconds, line=5.2,ylab=Kbytes, cex.lab=2,1)
Hope I am not simplifying this in a bad way. These lines plot everything
properly except the
Hi,
Kbytes RSS rNo
2689632 1450876 1433788
2689632 1450876 1433788
2689632 1450876 1433788
2689632 1450876 1433788
2689632 1450876 1433788
2689632 1450876 1433788
2689632 1450876 1433788
2689632 1460168 1443084
It is not a constant but changes very slowly. Actually it should be like
this.
KbytesRSS rNo
2687188 1287532 1
2687188 1287532 2
2687188 1287536 3
2687188 1287540 4
2687188 1287640 5
2687188 1287640 6
Thanks,
Mohan
From: John Kane jrkrid...@inbox.com
Hi,
Can't one y-axis be used ? Both 'Kbytes' and 'RSS' use the
same unit.
Thanks,
Mohan
From: John Kane jrkrid...@inbox.com
To: mohan.radhakrish...@polarisft.com
Cc: r-help@r-project.org
Date: 08/27/2013 05:13 PM
Subject:RE: [R] Scale of axis for two data
prohibited. Visit us at http://www.polarisFT.com
FREE ONLINE PHOTOSHARING - Share your photos online with your friends and
family!
Visit http://www.inbox.com/photosharing to find out more!
[attachment mohan.pdf deleted by Mohan Radhakrishnan
Hi,
I am able to proceed like this.
Input :
4000 36 36 0 r-x-- java
40108000 8 8 8 rwx-- java
4010a000 12 0 0 -[ anon ]
4010d0001016 44 44 rwx--[ anon ]
4020b000 12
Hi,
When I view this output from the unix command ''ps'' the columns seem to
properly aligned but it is not read properly into the data frame. The
aggregate function throws
Error in aggregate.data.frame(data, by = list(COMMAND), FUN = sum) :
object 'COMMAND' not found
Is there a recomendation
Hi,
I am not the expert but I came across shiny.rstudio.org. It has Twitter
bootstrap as its foundation. Others will know if there is a proper web
framework that R can integrate with.
Thanks.
My code is not complete. But the headers I see are
USER PID %CPU %MEMVSZ RSS TTY STAT START TIME COMMAND
684517 0.0 0.0 12348 864 ?SAug08 0:00
hald-addon-keyboard: listening on /dev/input/event1
684521 0.0 0.0 12348 860 ?S
This is the output.
str(data)
'data.frame': 78 obs. of 1 variable:
$
USER...PID..CPU..MEMVSZ...RSS.TTY..STAT.START...TIME.COMMAND:
Factor w/ 78 levels 684504 0.0 0.0 31680 4596 ?Ss
Aug08 0:01 hald,..: 17 18 19 20 21 22 23 24 25 26 ...
Hi,
The file handling code sometimes throws this exception.
Error in UseMethod(close) :
no applicable method for 'close' applied to an object of class c
('integer', 'numeric')
Is there a sample based on my code that I can test ? I want to extract the
file descriptors from the hashmap and
Hi,
I thought that 'R' like java will allow me to store file names
(keys) and file descriptors(values) in a hashmap.
filelist.array - function(n){
sink(nmon.log)
cpufile - new.env(hash=T, parent=emptyenv())
for (i in 1:n) {
key - paste(output, i, .txt, sep = )
assign(key,
Hi,
The solution that works now is
closeAllConnections()
But even if I replace the 'list' with the 'array' I get a similar error.
Exception is Error in UseMethod(\close\): no applicable method for
'close' applied to an object of class \c('double', 'numeric')\\n
#Write each
Hi Jim,
close(filedescriptors$cpufiledescriptors[[1]])
close(filedescriptors$cpufiledescriptors[[2]])
close(filedescriptors$cpufiledescriptors[[3]])
I might be doing something wrong. Error is
Error in UseMethod(close) :
no applicable method for 'close' applied to an object of
Hi,
I am creating a list of 2 lists, one containing filenames
and the other file descriptors. When I retrieve them I am unable to close
the file descriptor.
I am getting this error when I try to call close(filedescriptors
[[2]][[1]]).
Error in UseMethod(close) :
no applicable
Hi,
plot(xc, yc, type=l, ylim=c(0,50), xlim=c(0,50), lwd=2, xlab=M,
ylab=seconds)
abline(a=-think, b=cpustime, lty=dashed, col=red)
abline( 2.2, 0, lty=dashed, col = red)
This draws a response time curve an asymptote and a horizontal line. How
do I draw a line from the intersection of
[mailto:michael.weyla...@gmail.com]
Sent: Tuesday, August 14, 2012 11:49 AM
To: Mohan Radhakrishnan
Cc: r-help@r-project.org
Subject: Re: [R] Graphing question(basic)
Hi Mohan,
Your code isn't reproducible as is: see
http://stackoverflow.com/questions/5963269/how-to-make-a-great-r-reprodu
cible-example
for more
Hi,
I am looking for some assistance with these requirements. We
are trying to simulate web requests to hit a web applications. Let's
assume I have a url to hit that requires a username and password.
1. These web requests should have exponential inter arrival times.
2.
...@sapo.pt]
Sent: Wednesday, June 27, 2012 4:11 PM
To: Mohan Radhakrishnan
Cc: r-help@r-project.org
Subject: Re: [R] Simulating web requests
Hello,
Homework?
There's a no homework rule but see inline.
Em 27-06-2012 10:20, Mohan Radhakrishnan escreveu:
Hi,
I am looking for some
: David Winsemius [mailto:dwinsem...@comcast.net]
Sent: Wednesday, June 27, 2012 8:13 PM
To: Mohan Radhakrishnan
Cc: r-help@r-project.org
Subject: Re: [R] Simulating web requests
On Jun 27, 2012, at 6:58 AM, Mohan Radhakrishnan wrote:
Homework ? You mean the question is at a high level.
I use R
Hi,
Stackoverflow had an example. Forgot the contributor's name but it shows
percentages at the top. I use it as it is as I am not the expert.
png(Histogram.png)
pdata-read.csv(histogram.csv,header=T)
histPercent - function(x, ...) {
H - hist(pdata$y, plot = FALSE)
H$density -
Hi,
Is there a way to calculate variance directly by specifying
confidence interval using R ? I am specifically asking because I wanted
to investigate how this could be useful for project schedule variance
calculation.
Moreover I am interested in using R for monte carlo simulation as
Hi,
I came across the integration package that lets a Java
program interact with R. Does any one use this model for simulation ? I
am plannning to get random variates generated by R which could be the
number of bytes according to various distributions. My client load
generator can
Hi,
I understand that R can be used to plot correlated values using a
Multi-parameter histogram. We have authorization requests and response
and they are correlated because a response is governed by a SLA. Is it a
good use case for using R to correlate these requests and responses ?
Hi,
I am again asking a generic question and the general response for such
questions is cold. I am a beginner but use and write simple R scripts.
I am looking for some ideas to calculate the confidence intervals
based on this excerpt from the paper. Moreover it would help
] On
Behalf Of Mohan Radhakrishnan
Sent: Thursday, June 07, 2012 5:00 PM
To: r-help@r-project.org
Subject: [R] Basic question about confidence intervals
Hi,
I am again asking a generic question and the general response for such
questions is cold. I am a beginner but use and write simple R
I think part of my question about using R facilities from a program is
answered by http://binfalse.de/2011/02/talking-r-through-java/
Thanks.
-Original Message-
From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org]
On Behalf Of Mohan Radhakrishnan
Sent: Tuesday, May
Hi,
I plot no: of bytes against time and find the distribution
curve using R. These bytes are sent from the client to the server.
Is there a way to generate bytes randomly using R according to a
distribution ? I would like to send these bytes to the server. Hope I am
not misguided
PM
To: Mohan Radhakrishnan
Cc: r-help@r-project.org
Subject: Re: [R] variate generation
And what distribution would that be
R provides many built in distributions, but if those aren't enough for
you, you can check:
http://cran.r-project.org/web/views/Distributions.html
Best,
Michael
On Mon
Hi,
I have been asking only general questions even though I am using
basic R functionality. Hope there will be some ideas from the forum. I
am looking for a way to project workloads and capacity for software
servers. One book I have come across is 'Applied Linear Regression
Models'. I
Hi,
I am working on a capacity planning task for a socket server. As
part of the research I read Quickly Generating Billion-Record
Synthetic Databases which is about benchmarking databases. I understand
from that paper that there are specific datasets with statistics
properties that can
Hi,
I am a new user and this is a basic question. I have read the
posting guidelines too. So if this more appropriate for a statistics
forum I will ask them.
I have a socket server and client and the bytes are piped to
graphite which is a graphing library. The intention is to
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