Check if all vector elements have same sign
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Oscar Frick
am 31 Mai 2018
Kommentiert: Oscar Frick
am 1 Jun. 2018
Is there an efficient (and easy) way to check if all elements of a vector have the same sign (not caring about zero values)?
I can think of applying sign(v) and checking if all elements is equal to the first one after having removed all elements where sign(v)==0, but this fells somewhat clumsy. Is there an easier or more efficient way?
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