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- floating point - Why is NaN not equal to NaN? - Stack Overflow
NaN is designed to propagate through all calculations, infecting them like a virus, so if somewhere in your deep, complex calculations you hit upon a NaN, you don't bubble out a seemingly sensible answer Otherwise by identity NaN NaN should equal 1, along with all the other consequences like (NaN NaN)==1, (NaN*1)==NaN, etc
- What is the difference between NaN and NA? - Cross Validated
I would like to know why some languages like R has both NA and NaN What are the differences or are they equally the same? Is it really needed to have NA?
- python - How to check for NaN values - Stack Overflow
float('nan') represents NaN (not a number) But how do I check for it?
- javascript - Why is NaN === NaN false? - Stack Overflow
JavaScript automatic type conversion convert NaN into number, so checking if a number is not a number will always b false and NaN !== NaN will be true
- How do I interpret NaN values in statsmodels. stats. anova_lm result
NaN is an absorbing operand for mathematical operations For example, a float plus a Nan is a Nan So first ensure that your original data is Nan -free The second issue that can come up which might produce a Nan is when an undefined operation, such as division by zero, is computed Another example is taking the logarithm of zero
- What is the difference between NaN and None? - Stack Overflow
In my opinion, the value read to that dictionary entry should be None but instead nan is assigned Surely None is more descriptive of an empty cell as it has a null value, whereas nan just says that the value read is not a number Is my understanding correct, what IS the difference between None and nan? Why is nan assigned instead of None?
- javascript - Is NaN equal to NaN? - Stack Overflow
37 It's a special case, NaN is the only thing in Javascript not equal to itself Although the other answers about strings vs the NaN object are right too
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