Plotting math in R can be acheived using the expression(). To know detailed usage, in R console,demo(plotmath)But expression() is not flexible when you want to plot math symbols and parameters altogether. In this case, we use bquote() which is actually a wraper for substitute() and quote(). It has the ability to do paste() and expression() altogether. Here...
Monthly Archives: October 2008
Plotting Math in R
Plotting math in R can be acheived using the expression(). To know detailed usage, in R console,demo(plotmath)But expression() is not flexible when you want to plot math symbols and parameters altogether. In this case, we use bquote() which is actually a wraper for substitute() and quote(). It has the ability to do paste() and expression() altogether. Here...
The most popular programming languages in 2008
TIOBE has released the newest ranking for the most popular programming language here. Java remains the top popular programming language. C and C++ follow with Java. I dont' see R in this ranking. Maybe it doesn't belong to this group! Maybe I should ...
The most popular programming languages in 2008
TIOBE has released the newest ranking for the most popular programming language here. Java remains the top popular programming language. C and C++ follow with Java. I dont' see R in this ranking. Maybe it doesn't belong to this group! Maybe I should ...
Working with directories
Something quite annoying to me is when I get an R script and I have to change all of the file references in the script. I get something like this this: source("C:\\Documents and Settings\\UserName\\Data\\...\\File1.R") data<-read.table("C:\\Documen...
Rmetrics – Basics of Option Valuation
Open Source Software for Financial Engineering and Computational FinanceRmetrics is the premier open source solution for teaching financial market analysis and valuation of financial instruments. With hundreds of functions build on modern methods Rmet...
What I’ll be presenting at O’Reilly Money Tech 2009
(April 2009 Update: Unfortunately, The Money Tech Conference was indefinitely postponed, but fortunately I will be presenting a version of this talk in July at OSCON 2009). I’ve been invited to speak at O’Reilly’s Money Tech conference this coming February 4-6th in New York City and thought I’d share the abstract for my talk here. I’ll
Another solution to the R to Word table problem
Last time I used an HTML solution. This time, I create an RTF file:
# function: my.rtf.table
# purpose: convert a matrix, data.frame, or array into a rtf table
# output: text for RTF, possibly written to a file
# inputs:
# tab - a table, dataframe, or array (needs rownames and colnames)
# outfile - name of file (or console if NULL,...
Using R in consulting: playing nice with Microsoft Word
As I use R more in consulting, I'm finding the need to make the quick transition from R to Microsoft products (usually Word) more serious. (I'm using a Windows platform, but I'm sure the challenges on the Mac would be similar.) I simply don't have time to do the text manipulations necessary to convert text to Word tables, for...
Time series packages on R
There is now an official CRAN Task View for Time Series. This will replace my earlier list of time series packages for R, and provide a more visible and useful entry point for people wanting to use R for time series analysis. If I have missed anything on the list, please let me know.
Zero Inflated Models and Generalized Linear Mixed Models with R.
Zuur, Saveliev, Ieno (2012).
