After executing the command, the User is asked to choose
1 - for plotting actual and predicted values,
2 - for plotting residuals,
3 - for plotting regression coefficients on one plot,
4 - for plotting regression coefficients in separate png files, saved in the temporary directory, and moreover, to paste them into one big plot (also saved as a png file in the temporary directory),
5 - for plotting p-values for t-test of statistical significance for regression coefficients on one plot,
6 - for plotting p-values for t-test of statistical significance for regression coefficients in separate png files, saved in the temporary directory, and moreover, to paste them into one big plot (also saved as a png file in the temporary directory).
Chosing 0 exits the plot
command.
If non.interactive=TRUE
all the above plots are made.