For example
>>> expand((cos(x)**5).rewrite(exp)).rewrite(cos)
5*cos(x)/8 + 5*cos(3*x)/16 + cos(5*x)/16
On Saturday, March 28, 2015 at 8:59:13 AM UTC+1, Kalevi Suominen wrote:
>
>
>
> On Saturday, March 28, 2015 at 2:01:38 AM UTC+2, Jeremy Holleman wrote:
>>
>> I just mean that if I'm trying to wr
On Saturday, March 28, 2015 at 2:01:38 AM UTC+2, Jeremy Holleman wrote:
>
> I just mean that if I'm trying to write a script and I want to reduce all
> of the powers of cos or sin, I'm not sure how I would code that, because I
> can't tell if there's a pattern of which calls need to be made in
It seems like TR7 reduces only cos(x)**2
On Saturday, March 28, 2015 at 3:16:53 AM UTC+2, Jeremy Holleman wrote:
>
> I'll do that. Thanks to both of you for the help!
>
> On Friday, March 27, 2015 at 8:30:03 PM UTC-4, Aaron Meurer wrote:
>>
>> I would take a look at the fu paper for more refere
I'll do that. Thanks to both of you for the help!
On Friday, March 27, 2015 at 8:30:03 PM UTC-4, Aaron Meurer wrote:
>
> I would take a look at the fu paper for more references on what these
> rules are supposed to be, but I suspect that this is a bug.
>
> Aaron Meurer
>
> On Fri, Mar 27, 20
I would take a look at the fu paper for more references on what these
rules are supposed to be, but I suspect that this is a bug.
Aaron Meurer
On Fri, Mar 27, 2015 at 7:01 PM, Jeremy Holleman
wrote:
> I just mean that if I'm trying to write a script and I want to reduce all of
> the powers of co
I just mean that if I'm trying to write a script and I want to reduce all
of the powers of cos or sin, I'm not sure how I would code that, because I
can't tell if there's a pattern of which calls need to be made in which
order to reduce an arbitrary polynomial of trig functions. For my present
What do you mean "how I would do that in a programmatic way"?
On Friday, March 27, 2015 at 11:33:27 PM UTC+2, Jeremy Holleman wrote:
>
> Update - Some combination of TR7, TR8, and expand() seems to work for
> powers that I've tried. For example:
>
> In [5]: TR8(expand(TR8(cos(x)**7)))
>> Out[5]
Update - Some combination of TR7, TR8, and expand() seems to work for
powers that I've tried. For example:
In [5]: TR8(expand(TR8(cos(x)**7)))
> Out[5]: 35*cos(x)/64 + 21*cos(3*x)/64 + 7*cos(5*x)/64 + cos(7*x)/64
But it's not clear to me how I would do that in a programmatic way.
Jeremy
O
Thanks! That did exactly what I want for cos**2. I would also like to
reduce the power on higher order terms. I tried TR7() on cos(x)**3 and
cos(x)**4 and it did not make any changes. From quick glance here
(https://github.com/sympy/sympy/blob/master/sympy/simplify/fu.py), TR7
seems like th
Hello, Jeremy.
Try this:
from sympy.simplify.fu import TR7
TR7(cos(x)**2)
On Friday, March 27, 2015 at 8:36:43 PM UTC+2, Jeremy Holleman wrote:
>
> Hi,
>
> I'm relatively new to SymPy, and enjoying it so far. I'm trying to
> analyze the harmonics that result when a sinusoid goes through a no
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