hasNull

Syntax

hasNull(X)

Arguments

X is a scalar/vector/matrix/table.

Details

For a scalar, return true if it is NULL.

For a vector, return true if at least one element is NULL.

For a matrix or a table, return true if at least one element of at least one column is NULL.

Please refer to related functions: isNull, nullFill.

Examples

$ hasNull NULL;
1

$ x=00f;
$ hasNull x;
1

$ hasNull 5;
0

$ hasNull(1 2 NULL 4 NULL 6);
1

$ x=((NULL,1),2);
$ hasNull x;
0

$ m=(1 NULL 3 4 5 6)$2:3;
$ hasNull m;
1

$ t=table(`AAPL`IBM`MSFT as sym, 2200 NULL 4500 as qty);
$ hasNull(t);
1