Blog Archives

Preview version of RStudio 0.97 is now available

October 28, 2012
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Rstudio has changed its website extension from rstudio.org to rstuido.com/ide and kept its new preveiw version at below link, few new things as "package development" tools are included in this version that makes job easy to develop new package.http:/...

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Read Big Text Files Column by Column

April 27, 2012
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Dear R Programmers,There is new package "colbycol" on CRAN, which makes our jobs easier when we have large files i.e. more than a GB to be read in R. Especially, when we don't need all of the columns/variables for our analysis. Kudos for author, Carlos...

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A view on R Capabilities

December 11, 2011
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A view on R Capabilities

Dear R Programmers,I have tried to capture R capabilites in a single slide. I welcome your comments/suggestions on the same.

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Usage of R functions "table" & "ifelse" when NA’s exist

January 12, 2011
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Most of the time I came across now and then in help posts questions regarding the mismatching total count of observations after employing the R functions "table" and "ifelse". This usually creates frustration among fresh/part-time practitioners which e...

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Usage of R functions "table" & "ifelse" when NA’s exist

January 12, 2011
By

Most of the time I came across now and then in help posts questions regarding the mismatching total count of observations after employing the R functions "table" and "ifelse". This usually creates frustration among fresh/part-time practitioners which e...

Read more »

Knowing whether a time-series has been differenced appropriately in order to make it stationary

May 7, 2010
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Hello everybody,

Today I would like to make you learn a simple method (and of-course using R) how to identify whether a time-series has been differenced appropriately while making it stationary.

Suppose, you have made a series stationary by differencing it, now in order to know whether it is neither over nor under differenced subject the current series against next level...

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Knowing whether a time-series has been differenced appropriately in order to make it stationary

May 7, 2010
By

Hello everybody,

Today I would like to make you learn a simple method (and of-course using R) how to identify whether a time-series has been differenced appropriately while making it stationary.

Suppose, you have made a series stationary by differencing it, now in order to know whether it is neither over nor under differenced subject the current series against next level...

Read more »

Easy way of determining number of lines/records in a given large file using R

February 10, 2010
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Dear Readers,

Today I would like to post the easy way of determining number of lines/records in any given large file using R.

Directly to point.

1) If data set is small let say less than 50MB or around in R one can read it with ease using:
length(readLines("xyzfile.csv"))

2) But if data set is too large say more...

Read more »

Easy way of determining number of lines/records in a given large file using R

February 10, 2010
By

Dear Readers,

Today I would like to post the easy way of determining number of lines/records in any given large file using R.

Directly to point.

1) If data set is small let say less than 50MB or around in R one can read it with ease using:
length(readLines("xyzfile.csv"))

2) But if data set is too large say more...

Read more »