RuntimeWarning: overflow encountered in np.exp(x**2)

Question

I need to calculate `exp(x**2)` where `x = numpy.arange(30,90)`. This raises the warning: ``` RuntimeWarning: overflow encountered in exp inf ``` I cannot safely ignore this warning, but neither SymPy nor mpmath is a solution and I need to perform array operations so a Numpy solution would be my dream. Does anyone know how to handle this problem?

Accepted Answer

You could use a data type that has the necessary range, for example `decimal.Decimal`:

```
>>> import numpy as np
>>> from decimal import Decimal
>>> x = np.arange(Decimal(30), Decimal(90))
>>> y = np.exp(x ** 2)
>>> y[-1]
Decimal('1.113246031563799750400684712E+3440')
```

But what are you using these numbers for? Could you avoid the exponentiation and work with logarithms? More detail about your problem would be helpful.

RuntimeWarning: overflow encountered in np.exp(x**2)

Solution

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