PICK:COUNTS

MATRIX

 PICK\COUNTS\MATRIX { xin yin } matrix counts
 Defaults: xin = [1;2;3;...], yin = [1;2;3;...]

 The PICK\COUNTS\MATRIX command allows the user to pick boxes off the
 screen and the number of counts of the matrix inside each box will be
 displayed on the screen and stored in the output vector, counts.
 The input vectors, xin and yin, should contain the x and y coordinates
 for the matrix, where xin corresponds to the columns and yin corresponds
 to the rows.  matrix[i,j] has coordinates ( xin[j], yin[i] ).
 xin and yin both default to [1;2;3;...] if not entered.