How to round up a complex number?
How can a complex number (for example 1.9999999999999998-2j
) be rounded up to 2-2j
?
When I tried to use
print(round(x,2))
it showed
Traceback (most recent call last):
File "C:\Python34\FFT.py", line 22, in <module>
print(round(x,2))
TypeError: type complex doesn't define __round__ method
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3 answers
I would say the best way to do this is as such
x = (1.542334+32.5322j)
x = complex(round(x.real),round(x.imag))
if you don't want to repeat this every time you want, you can put this in a function.
def round_complex(x):
return complex(round(x.real),round(x.imag))
Additional optional arguments can be added to this, for example if you only want to round one part, for example, or if you want to round to a certain number of decimal places in the real or complex part
def round_complex(x, PlacesReal = 0, PlacesImag = 0, RoundImag = True, RoundReal = True):
if RoundImag and not RoundReal:
return complex(x.real,round(x.imag,PlacesImag))
elif RoundReal and not RoundImag:
return complex(round(x.real,PlacesReal),x.imag)
else: #it would be a waste of space to make it do nothing if you set both to false, so it instead does what it would if both were true
return complex(round(x.real,PlacesReal),round(x.imag,PlacesImag))
since variables are automatically set to true or 0, you don't need to type them in if you don't want to. But it's convenient to have them
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