Virendra kumar and Hakim thank you very much for the help,please dont be tired when we need hep😂😂.But Virendra i cant refer to Director, National Geophysical Research Institute, Hyderabad, India,because I don't have any contact or address of this institute.
Hello Hakim the link" http://www.inside-r.org/packages/cran/lcmr/docs/plot.gibbs" has been removed,then this link " http://www.r-project.org/'" is for an other software. Thanks