PRINT ' '
PRINT 'PLOTDOTS:  Plots dots or pluses at all defined (or'
PRINT 'undefined) data values in Matrix (0).'
print 'Syntax:  PLOTDOTS(type)'
PRINT ' '
PRINT 'MXMIN,MXMAX=',MXMIN,MXMAX
PRINT 'MYMIN,MYMAX=',MYMIN,MYMAX
PRINT 'MRATIO=',MRATIO
PRINT ' ' 
