Wanted to do a PCA regression for a dataset and in that context, I felt that it would be nice if I can visualize the  correlations between a whole set of variables.
Thats when I stumbled on to IDPmisc

The IDPmisc package contains different high-level graphics functions for displaying large datasets, displaying circular data in a very flexible way, finding local maxima, brewing color ramps, drawing nice arrows, zooming 2D-plots, creating figures with differently colored margin and plot region. In addition, the package contains auxiliary functions for data manipulation like omitting observations with irregular values or selecting data by logical vectors, which include NAs. Other functions are especially useful in spectroscopy and analyses of environmental data: robust baseline fitting, finding peaks in spectra.
-- Published: 2009-10-27

Hoping that my friend will help me in many ways