Code: pow with negative base does #IND

[jacob]

Code: Select all

x = pow(-1,4);

Why does this code show me -1.#IND on the streamout? Instead of correct value -> 1.

[CoreStyler]

You will never get >4. At least you will get 4.
To do a statement is better to use green data, and streambool out the result (0 is false, 1 is true).
and -1 * -1 *-1 *-1 = 1.

[jacob]

You will never get >4. At least you will get 4.
To do a statement is better to use green data, and streambool out the result (0 is false, 1 is true).

Sorry, that was wrong. I want 1 to come out and not the 4 I mentioned first.

Negative Power.osm

(17.05 KiB) Downloaded 35 times

[CoreStyler]

You will never get >4. At least you will get 4.
To do a statement is better to use green data, and streambool out the result (0 is false, 1 is true).

Sorry, that was wrong. I want 1 to come out and not the 4 I mentioned first.

The attachment Negative Power.osm is no longer available

Done. you want to have a negative phase?

Negative Power.osm

(19.26 KiB) Downloaded 36 times

To calculate:
pow (-1,4) synthmaker not work (don't know why).
But doing
pow (1,4) * -1 does.

And with your code you bypassed the input.
So i addedd
out = in + pow(1,4) * -1;
instead of
out = pow(1,4) * -1;
Because you bypass the input that does not affect anything.

[jacob]

Done. you want to have a negative phase?

Negative Power.osm

To calculate:
pow (-1,4) synthmaker not work (don't know why).
But doing
pow (1,4) * -1 does.

And with your code you bypassed the input.
So i addedd
out = in + pow(1,4) * -1;
instead of
out = pow(1,4) * -1;
Because you bypass the input that does not affect anything.

Thank you for your very fast answers and the osm. but this is not what I was after. I want 1 be negative or positive depending on the exponent. So every even number (2,4,6,...) makes it positive:
(-1)^4 = (-1)*(-1)*(-1)*(-1) = 1
And every uneven number (1,3,5,...) makes it negative:
(-1)^3 = (-1)*(-1)*(-1) = -1

[jacob]

I solved it with another calculation. Dividing the variable by 2 and checking if it has decimal places - by checking it against the rounded value. But it would be better if the pow() would work.

Negative Power.osm

(17.76 KiB) Downloaded 52 times

[martinvicanek]

SM's implementation of pow() allows for non-integer exponents hence it expects a positive base to make sure that the result is a real (not a complex) number.

[jacob]

SM's implementation of pow() allows for non-integer exponents hence it expects a positive base to make sure that the result is a real (not a complex) number.

Thank you for this info.