2 ms·
A lot of them were NaN. I seem to recall that ~0.5% of the IEEE 32 bit float space is NaN.
by dagw 7y ago
A lot of them were NaN.
I seem to recall that ~0.5% of the IEEE 32 bit float space is NaN.
- ekimekim 7y agoA NaN is any value where the 7-bit (for 32-bit floats) exponent is all 1s, except for +/-inf. So a quick approximation is that 1/128 ~= 0.78% of the space is NaN. That means there's 25 bits that we can change while still being either a NaN or an inf. But two of those values are infs, so we need to remove them. Divide that by the entire range and we have (2^25 - 2) / 2^32 = 16777215/2147483648, or about 0.78124995%.