It should work, yes. plot() will evaluate the integral numerically. Aaron Meurer
On Wed, May 3, 2017 at 4:58 PM, Carlos Bouthelier Madre < [email protected]> wrote: > All right! Thanks again. > > If later I would like to plot that integral(f(xi,Beta)*dxi) with Beta in > the X axis, would it work? > > > El miércoles, 3 de mayo de 2017, 0:17:41 (UTC+2), Aaron Meurer escribió: >> >> If you use Integral() instead of integrate() it will keep the integral >> unevaluated. Otherwise, it will try to compute it, and if it cannot compute >> a closed-form expression, it will return an Integral object. >> >> Aaron Meurer >> >> On Tue, May 2, 2017 at 6:16 PM, Carlos Bouthelier Madre < >> [email protected]> wrote: >> >>> Thanks for your message, Aaron! >>> I restarted my computer and it worked, not having changed a thing, >>> so.... problem solved! >>> >>> I have another problem though, I have a function f(x) which I know has >>> no primitive, but I want to define its integral from 0 to 2*pi, would >>> python know what integrate(f(x),(x,0,2*pi)) means? Or, conversely, would it >>> keep trying to get a primitive expression "indefinitely"? (I think this is >>> what is happening) If so, does anybody know if there is another way to do >>> this? >>> >>> In fact , what I have is f(x1,x2,...xi,xi+1,....xn,Beta) and I want to >>> define the integral of that function in the xi variables from i=1 to n >>> iteratively (n is a value, like 10) from i=1 to N, obtaining an expression >>> exclusively on Beta (I say this just in case it makes harder the use of an >>> hypothetic method that could solve my problem ) >>> >>> Thanks in advance!! >>> >>> El domingo, 30 de abril de 2017, 3:16:11 (UTC+2), Aaron Meurer escribió: >>>> >>>> Matrices can have expressions as elements. What does the code do when >>>> you run it? It doesn't run for me because kron is not defined. >>>> >>>> Aaron Meurer >>>> >>>> On Sat, Apr 29, 2017 at 7:52 AM, Carlos Bouthelier Madre < >>>> [email protected]> wrote: >>>> >>>>> Hi, I have just started using sympy and I don't really know how to >>>>> make this work. I've got functions that should return a matrix (I don't >>>>> know if that is possible) whose elements are expressions of symbolic >>>>> variables. >>>>> This is my code, I've made a logical analysis of it (in pseudo-code) >>>>> and it should do what I want to, the issue is that I am neither used to >>>>> sympy variables nor to python syntaxis, so I would really appreciate your >>>>> help. >>>>> >>>>> from sympy import * >>>>> from sympy import cos >>>>> from sympy.tensor.array import Array >>>>> from sympy import I, Matrix, symbols >>>>> from sympy import init_printing >>>>> from sympy import init_session >>>>> >>>>> >>>>> from IPython.display import display, Math, Latex >>>>> >>>>> >>>>> var('Tita1 Tita2 Tita3 Tita4 Tita5 Tita6 Beta eps', real=True) >>>>> def delta(n): >>>>> f='Tita'+str(n) >>>>> return sqrt(cos(f)*cos(f)*eps*eps+1) >>>>> >>>>> def EF(i): >>>>> return Matrix([[0,0],[0,2*delta(i)]]) >>>>> >>>>> ID=Matrix([[1,0],[0,1]]) >>>>> >>>>> def ExtDim(X,n): >>>>> if n==1: >>>>> return X >>>>> else: >>>>> return kron(ExtDim(X,n-1),ID) >>>>> >>>>> def n_energy(n): >>>>> if n==1: >>>>> return EF(n) >>>>> else: >>>>> return kron(ID,n_energy(n-1))+ExtDim(EF(n),n) #This should be >>>>> a matrix >>>>> >>>>> >>>>> Thanks in advance! >>>>> >>>>> -- >>>>> You received this message because you are subscribed to the Google >>>>> Groups "sympy" group. >>>>> To unsubscribe from this group and stop receiving emails from it, send >>>>> an email to [email protected]. >>>>> To post to this group, send email to [email protected]. >>>>> Visit this group at https://groups.google.com/group/sympy. >>>>> To view this discussion on the web visit >>>>> https://groups.google.com/d/msgid/sympy/ea805a03-ad40-44e9- >>>>> 8b44-f9957536e192%40googlegroups.com >>>>> <https://groups.google.com/d/msgid/sympy/ea805a03-ad40-44e9-8b44-f9957536e192%40googlegroups.com?utm_medium=email&utm_source=footer> >>>>> . >>>>> For more options, visit https://groups.google.com/d/optout. >>>>> >>>> >>>> -- >>> You received this message because you are subscribed to the Google >>> Groups "sympy" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to [email protected]. >>> To post to this group, send email to [email protected]. >>> Visit this group at https://groups.google.com/group/sympy. >>> To view this discussion on the web visit https://groups.google.com/d/ms >>> gid/sympy/59614cf0-8cc3-43c5-946a-af3058c7f770%40googlegroups.com >>> <https://groups.google.com/d/msgid/sympy/59614cf0-8cc3-43c5-946a-af3058c7f770%40googlegroups.com?utm_medium=email&utm_source=footer> >>> . >>> >>> For more options, visit https://groups.google.com/d/optout. >>> >> >> -- > You received this message because you are subscribed to the Google Groups > "sympy" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at https://groups.google.com/group/sympy. > To view this discussion on the web visit https://groups.google.com/d/ > msgid/sympy/e721540f-d18e-4bdf-bcca-f98b940a2d66%40googlegroups.com > <https://groups.google.com/d/msgid/sympy/e721540f-d18e-4bdf-bcca-f98b940a2d66%40googlegroups.com?utm_medium=email&utm_source=footer> > . > > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "sympy" group. 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