Language Reference

COUNTUNIQUE (x <, method> ) ;

This function is supported by the IML procedure and the iml action.

The COUNTUNIQUE function counts the number of unique values in a matrix. The arguments are as follows:

The method argument is not case-sensitive. The first three characters are used to determine the value.

For example, the following statements count unique values for the matrix x:

x={1 2 3,
   1 1 2,
   1 1 1,
   1 0 0};
allUnique = countunique(x);
rowUnique = countunique(x, "ROW");
colUnique = countunique(x, "COL");
print allUnique, rowUnique, colUnique;