This is a list of new or updated packages that were released for R in February, as announced on the r-packages mailing list. To include other updates on this list, please email David Smith. For a complete list of all updates on CRAN, see the CRANberries archive for February 2010. Follow package name links for ratings and other information on crantastic.org.

ggplot2, the graphics system based on the Grammar of Graphics, has been updated with a new transform and several bug fixes.

GWRM, a new package for fitting Generalized Waring Regression Models, has been released.

interval, a package that calculates weighted logrank tests and nonparametric maximum likelihood estimates for interval censored data, has been updated to improve performance.

mboost, a package for model-based boosting, has been updated with many new features, including new families available for ordinal, expectile and censored regression. 

np, a package implementing nonparametric kernel smoothing methods for mixed data types, has been updated with new nonparametric entropy-based testing methods.

RFLPtools, a new package providing analysis functions for DNA fragment molecular weights and nucleotide sequence similarities, has been released.

rms, the Regression Modeling Strategies package, has been updated to add several new capabilities.

solaR, a new package with calculation methods of solar radiation and performance of photovoltaic systems, has been released.

survey, a package for the analysis of complex survey samples, has been updated to allow database-backed designs can now use replicate weights and to add some multivariate statistics.

tsne, a new package implementing the T-distributed Stochastic Neighbor Embedding algorithm, has been released.