beNumeric               Whether a string vector can be converted to
                        numeric
fit2newdata             Make a new data set for prediction
getAspectRatio          Get aspect information of a ggplot
getMeans                calculate mean values of two consecutive number
getNewFormula           Make new formula
ggPredict               Visualize predictions from the multiple
                        regression models.
is.mynumeric            Decide whether a vector can be treated as a
                        numeric variable
myseq                   Generate regular sequences of desired length
                        between minimum and maximal values
number2group            Convert a numeriv vector into groups
predict3d               Draw 3d predict plot using package 'rgl'
rank2colors             Rank a numeric vector using proportional table
                        and returns character vector of names of color
                        using palette
rank2group2             Rank a numeric vector using proportional table
                        and returns a new ordinal vector
restoreData             Restore factors in data.frame as numeric
restoreData2            restore data column with I() function
restoreNames            Restore factors in variable name as numeric
slope2angle             Make angle data with slope data
