Use the doit() method, something like the following: f.doit()
Davide.
Il giorno mer 5 mag 2021 alle ore 14:58 Areeb Sherjil <
areebsher...@gmail.com> ha scritto:
> Oh no sorry, I used %matplotlib tk at the start and now it opens the graph
> in separate window.(Google groups does not allow to edit messages )
>
> But how to expand the summation series?
>
> On Wednesday, May 5, 2021 at 1:52:16 PM UTC+1 Areeb Sherjil wrote:
>
>> Respond to Davide
>>
>> Hi,
>> Thanks for this.
>> 1-I want to ask: how do I expand the sigma summation like :
>> cos+cos2+cos3..... etc
>> 2- Also how do I open the plot in a separate window to make it
>> bigger/zoom etc?
>>
>>
>> On Wednesday, May 5, 2021 at 1:31:05 PM UTC+1 sandona...@gmail.com wrote:
>>
>>> Whenever it makes sense, you should use assumptions on symbols. Since
>>> you are dealing with a Fourier Series, you should set:
>>>
>>> import sympy as syms
>>> import matplotlib.pyplot as plot
>>> import numpy as linspace
>>> n = syms.symbols('n', real=True, integer=True, positive=True)
>>> t = syms.symbols('t', real=True)
>>>
>>> T= 1
>>> w= 2*syms.pi/T
>>> V=1 # square wave of 1volts with 1second period
>>> Ao= (w/syms.pi)* syms.integrate(V,(t,0,0.5))
>>> An= (w/syms.pi)*syms.integrate(V*syms.cos(w*n*t),(t,0,T/2))
>>> Bn= (w/syms.pi)*syms.integrate(V*syms.sin(w*n*t),(t,0,T/2))
>>> f= Ao/2 +syms.Sum(An*syms.cos(n*w*t),(n,1,5))+
>>> syms.Sum(Bn*syms.sin(n*w*t),(n,1,5))
>>> f
>>>
>>> At this point, the expression f looks like can be simplified. Then:
>>>
>>> syms.plot(f.simplify(), (t, 0, 4*T))
>>>
>>> Davide.
>>>
>>>
>>> Il giorno mer 5 mag 2021 alle ore 14:07 Areeb Sherjil <
>>> areebs...@gmail.com> ha scritto:
>>>
>>>> No one is replying, lemme paste the code here:
>>>>
>>>>
>>>> import sympy as syms
>>>> import matplotlib.pyplot as plot
>>>> import numpy as linspace
>>>> n,t= syms.symbols('n,t')
>>>> T= 1
>>>> w= 2*syms.pi/T
>>>> V=1 # square wave of 1volts with 1second period
>>>> Ao= (w/syms.pi)* syms.integrate(V,(t,0,0.5))
>>>> An= (w/syms.pi)*syms.integrate(V*syms.cos(w*n*t),(t,0,T/2))
>>>> Bn= (w/syms.pi)*syms.integrate(V*syms.sin(w*n*t),(t,0,T/2))
>>>> f= Ao/2 +syms.Sum(An*syms.cos(n*w*t),(n,1,5))+
>>>> syms.Sum(Bn*syms.sin(n*w*t),(n,1,5))
>>>> f
>>>>
>>>> syms.plot(f,(t,0,2*T))
>>>>
>>>>
>>>>
>>>> On Friday, April 23, 2021 at 4:09:20 PM UTC+1 Areeb Sherjil wrote:
>>>>
>>>>> Hi all,
>>>>> I hope everyone is enjoying themselves!
>>>>> I am trying to compute the Fourier series of a simple signal(1 Volt
>>>>> square with freq of 1hz and 0.5T pulse width).
>>>>>
>>>>> This is what I need help with:
>>>>> 1- How can I make sympy display the results of the sigma summation as
>>>>> : Ao+An1+An2+An3....... etc instead of the way it now?Like how do I expand
>>>>> it?
>>>>> 2- When I try to plot this, I get a warning message telling me to
>>>>> report this as a bug? Why is this ?(look at screenshot)
>>>>>
>>>>> Any response is very much appreciated
>>>>> All necessary file attached(CODE:
>>>>> https://drive.google.com/file/d/17W3GqiN0x1oByMdgAiZHssGNu2aCJdPV/view?usp=sharing
>>>>> )[image: Screenshot (286).png]
>>>>>
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