ISND tests whether or not a variable is "ND".  Returns 1 if it is, 0 otherwise. 

SYNTAX:

ISND(Cx)
where :
Cx is a conditional variable x

NOTES:

This function will return BLANK if the input is blank (See example below).

EXAMPLES:

V91 = ISND(V71)

Variable 91 will be 1 when Variable 71 is "ND".  Otherwise it will be 0.