what is the sign function

1303853174019 — Fri, 05 Dec 2014 21:13:42 GMT

Re: what is the sign function

pmroz — Fri, 05 Dec 2014 21:55:33 GMT

There doesn't appear to be a sign function in JSL. Do you need a sign function? Something that returns 1 for positive, 0 for zero, and -1 for negative? Here's one solution:

Function Name: sign

Description: Returns 1 if positive, 0 for zero, -1 for negative

Arguments:

one_number Number to test

sign = function( {one_number},

{Default Local},

sign_value = .;

if (!is empty(one_number),

if (one_number > 0,

sign_value = 1,

one_number == 0,

sign_value = 0,

one_number < 0,

sign_value = -1

);

// Return the sign value

sign_value;

);

Sample usage:

a = sign(47);

print(a);

b = sign(0);

print(b);

c = sign(-999999);

print(c);

Yields the following in the log window:

-1

Re: what is the sign function

1303853174019 — Fri, 05 Dec 2014 22:02:18 GMT

Thanks PMroz, works great.

Gene

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what is the sign function

Re: what is the sign function

Re: what is the sign function