Displaying 20 results from an estimated 132 matches for "ambaresearch".
2008 Apr 09
11
Number of words in a string
...words in a string?
Example:
C="Have a nice day"
And the number of words should be 4. any built in function or?...
Thanks, Shubha
Shubha Karanth | Amba Research
Ph +91 80 3980 8031 | Mob +91 94 4886 4510
Bangalore * Colombo * London * New York * San José * Singapore * www.ambaresearch.com
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2010 Aug 30
1
How to Remove Autocorrelation from Simple Moving Average time series
...arima,100);arima$aic;
But is there any easy way that we can do in excel?? (Like differencing, dummy variable approach etc)
Thanks and Regards,
Ramesh Kallol | Amba Research
Ph +91 80 3980 8467 | Mob +91 9019720734
Bangalore * Colombo * London * New York * San José * Singapore * www.ambaresearch.com <http://www.ambaresearch.com/>
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2008 May 06
2
To preserve the class "Matrix"
..."integer"
> class(a[,1])
[1] "integer"
Can in a general way get class(a[1,]) or class(a[,1]) to be "matrix" only?
Shubha Karanth | Amba Research
Ph +91 80 3980 8031 | Mob +91 94 4886 4510
Bangalore * Colombo * London * New York * San José * Singapore * www.ambaresearch.com
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2008 Feb 06
1
wilderSum
Hi,
Can somebody tell me the formula for "?wilderSum" in TTR package? I mean how are these calculated?
BR, Shubha
Shubha Karanth | Amba Research
Ph +91 80 3980 8031 | Mob +91 94 4886 4510
Bangalore * Colombo * London * New York * San José * Singapore * www.ambaresearch.com
This e-mail may contain confidential and/or privileged i...{{dropped:13}}
2009 Feb 25
1
how to label the branches of a tree
...text(fit, use.n=TRUE)
But I am unable to label the branches (not the nodes) of the tree. Can somebody help me out in this?
Thank you,
Regards
Utkarsh Singhal | Amba Research
Ph +91 80 3980 8017 | Mob +91 99 0295 8815
Bangalore * Colombo * London * New York * San José * Singapore * www.ambaresearch.com <mailto:utkarshs@ambaresearch.com>
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2008 Jul 08
8
Sum(Random Numbers)=100
Hi R,
I need to generate 50 random numbers (preferably poisson), such that
their sum is equal to 100. How do I do this?
Thank you,
Shubha
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2008 May 13
3
Regular Expressions
...k like:
Ans=c("is","three","My")
gsub() can do this...but wondering how do I give the regular expression....
Shubha Karanth | Amba Research
Ph +91 80 3980 8031 | Mob +91 94 4886 4510
Bangalore * Colombo * London * New York * San José * Singapore * www.ambaresearch.com
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2008 Jun 19
2
Comparison between R and MATLAB
...ween R and MATLAB? How is R efficient than MATLAB? Or what are the weaknesses of R compared to MATLAB?
Thank you very much for your help,
Shubha
Shubha Karanth | Amba Research
Ph +91 80 3980 8031 | Mob +91 94 4886 4510
Bangalore * Colombo * London * New York * San José * Singapore * www.ambaresearch.com
This e-mail may contain confidential and/or privileged i...{{dropped:13}}
2008 Sep 29
3
Cross-tabulation Question
Hi R,
This is a cross tabulation question. Suppose that,
> d=read.table("clipboard",header=F)
> d
V1 V2 V3
A One Apple
A One Cake
A One Cake
B One Apple
B One Apple
B One Apple
> table(d$V2,d$V3)
Apple Cake
One 4 2
But, I don't want the count to be like the above. Here, it is counting
the
2008 Aug 07
3
Downloading Yahoo data
Hi R,
I am trying to download the data from R. I give the below command.
> library(fImport)
> yahooSeries("IBM")
trying URL
'http://chart.yahoo.com/table.csv?s=IBM&a=7&b=08&c=2007&d=7&e=07&f=2008&
g=d&x=.csv'
Error in download.file(url = url, destfile = file, method = method) :
cannot open URL
2008 May 13
2
Remove an object by the reference
...wer...
x="a"
a=5
I need to remove the object "a" by using only x. something like rm(somefunction(x))...Is this possible?
Shubha Karanth | Amba Research
Ph +91 80 3980 8031 | Mob +91 94 4886 4510
Bangalore * Colombo * London * New York * San José * Singapore * www.ambaresearch.com
This e-mail may contain confidential and/or privileged i...{{dropped:13}}
2008 Dec 29
1
How to get unique solution from nnet function
...ame data. If I give rang=0, it solves my problem but I am not sure whether I am doing the right thing. Any comments are welcome.
Thank you,
Regards
Utkarsh Singhal | Amba Research
Ph +91 80 3980 8017 | Mob +91 99 0295 8815
Bangalore * Colombo * London * New York * San José * Singapore * www.ambaresearch.com <mailto:utkarshs@ambaresearch.com>
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2008 Jul 23
18
Simple... but...
Hi R,
If
x=c(1,3,5)
y=c(2,4,6)
I need a vector which is c(1,2,3,4,5,6) from x and y.
How do I do it? I mean the best way....
Thanks, Shubha
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2008 Jul 23
8
sequential sum of a vector...
Hi R,
Let,
x=1:80
I want to sum up first 8 elements of x, then again next 8 elements of x,
then again another 8 elements..... So, my new vector should look like:
c(36,100,164,228,292,356,420,484,548,612)
I used:
aggregate(x,list(rep(1:10,each=8)),sum)[-1]
or
rowsum(x,group=rep(1:10,each=8))
But without grouping, can I achieve the required? Any other ways of
doing
2006 Nov 24
1
Fwd: Dates Conversion/write.foreign
---------- Forwarded message ----------
From: Shubha Vishwanath Karanth <shubhak at ambaresearch.com>
Date: Nov 24, 2006 7:54 PM
Subject: Dates Conversion/write.foreign
To: Shubha Karanth <shubhakaranth at gmail.com>, Shubha Vishwanath
Karanth <shubhak at ambaresearch.com>
Hi R experts,
I need an urgent help...
I have an a dataframe caled idat. Below i give a snapshot...
2008 Feb 14
3
Transposing by a group variable
Hi R,
Can I transpose a data frame by a particular group variable?
For example:
d=data.frame(group=c(1,1,2,2,2),val=c(6,4,6,3,5))
And my output should be:
data.frame(group=c(1,2),v1=c(6,6),v2=c(4,3),v3=c(NA,5))
Many thanks,
Shubha
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2008 Mar 25
3
Dimensions of a List
Hi R,
I have a list,
l=list(list(c(1,2),c(4,5),c(6,7)),list(c(11,22,33),c(44,55,66)))
> l
[[1]]
[[1]][[1]]
[1] 1 2
[[1]][[2]]
[1] 4 5
[[1]][[3]]
[1] 6 7
[[2]]
[[2]][[1]]
[1] 11 22 33
[[2]][[2]]
[1] 44 55 66
How do I know the dimensions of this list?... In other words, how many
sub-lists, sub-sub-lists etc...are there in l? How do I know this?
2008 Mar 20
3
Break up a data frame
Hi R users,
I have a dataframe in the below format
xyz 01/03/2007 15.25 USD
xyz 01/04/2007 15.32 USD
xyz 01/02/2008 23.22 USD
abc 01/03/2007 45.2 EUR
abc 01/04/2007 45.00 EUR
2007 Aug 20
3
Differentiation
Hi,
Could anyone tell me what is the command used in R to do
1. Differentiation
2. Newton Raphson method (Numerical Analysis in general...)
Are there any packages separately for this?
Thanks for your help!
BR, Shubha
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2008 Jun 19
2
Calling R functions into C# or C++
...nctions/routines from C# or C++? If so, how do I do this? Do I need to have some knowledge on DLL to do this?
Thanks a lot for your help,
Shubha
Shubha Karanth | Amba Research
Ph +91 80 3980 8031 | Mob +91 94 4886 4510
Bangalore * Colombo * London * New York * San José * Singapore * www.ambaresearch.com
This e-mail may contain confidential and/or privileged i...{{dropped:13}}