CODEWITHSUNDEEP
python-3.xpandas
CyberCube
CyberCube

Reputation: 169

Convert series to float pandas

i have a function that is supposed to chain link a list of daily returns in a dataframe, but when i pass the column, the function is returning a series, rather than a float

def my_aggfunc(x):
y = np.exp(np.log1p(x).cumsum())
return y

if however i change the second line to be

np.sum(x)

this returns a float

Any ideas pls?

Upvotes: 1

Views: 209

Answers (2)

Kyle
Kyle

Reputation: 2894

From the np.exp docs:

Calculate the exponential of all elements in the input array.

Returns:   out : ndarray   Output array, element-wise exponential of x.

So y is an array.

Upvotes: 0

piRSquared
piRSquared

Reputation: 294318

np.log1p(x) is an array.
np.log1p(x).cumsum() is another array of the same size.
np.exp(np.log1p(x).cumsum()) is yet another array.

I'm assuming you didn't want cumsum you wanted sum

np.exp(np.log1p(x).sum())

Upvotes: 1

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