Separate the positive values from the negative values

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abdullah qasim 2019-1-11

编辑： madhan ravi 2019-1-11

I have the following

X=[1 - 3 5 -8 4 9 -6 -3]

I want to separate the polarity ( positive values from the negative values) like this

Xp=[1 5 4 9]
Xn=[-3 -8 -6 -3]

then flip the negative values to positive values

Xn=[3 8 6 3]

then pass the values as a two-step

first, pass the positive step and the second pass the negative steps

NOTE : general methods

madhan ravi 2019-1-11

编辑：madhan ravi 2019-1-11

Xp=X(X>0)
Xn=X(X<0)
Xn=abs(Xn)

abdullah qasim 2019-1-11

any other way to make

Xfilp=XP+Xn

madhan ravi 2019-1-11

编辑：madhan ravi 2019-1-11

Xn=-Xn

Note : Only works if all the numbers are less than 0.

Xn(Xn<0)=-Xn(Xn<0) % alternate would work generally

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