Recent content by funcosed

Hi, I have a data vector that consists of directions measured in an experiment. I wish to create a probability density function. As the data is circular and multimodal I use a kernel density estimate with von Mises distribution (essentially a Gaussian on the unit circle) as the basis function. I...

solution here :)

Hi, I've attached a link to a picture showing what I need, and I did try bar but couldn't get that to work properly either.

Any python/matplotlib experts out there?? This one has been driving me crazy all day. I have three vectors, azimuth, frequency and power, which I would like to histogram and plot on a polar axis. I can plot a scatter plot this way no problem but the histogram gets messed up somehow. An example...

Thanks, that worked I hadnt imported it properly.

Newbie question... I'm just learning python and need some help with creating functions. I want to create a function that is callable from python shell. I write a script as follows, #!/usr/bin/python def examplr(str): print str save it as example.py, then in shell try...

What are equipartitioned waves?? Homework Statement Just wondering what is meant by 'equipartitioned waves', I came across the term while reading and think it has something to do with energy. Does it mean the waves have the same energy at every frequency (i.e. the spectrum is flat) ...

thanks

Homework Statement A masss m ossilates on a spring, find the position as a function of time. Homework Equations F=ma F=-ky The Attempt at a Solution Well known problem, set m(dx/dt) = -kx get roots of characteristic equation and sub into general solution, x = Aexp(iwt)...

An integral is a non-constant mapping which remains invarient on the forward orbit i.e. it is a conservative law for the difference equation.

Its the case of grad(F) so I guess it means after integrating on the closed loop, when evaluating the limits a and b, we have a = b so its just zero. I can't find a definition of the term perfect differential, but it was used in my text, which is...

Homework Statement Could someone explain what a perfect derivative is and why the line integral around a closed loop of a perfect derivative is equal to zero. Homework Equations The Attempt at a Solution

I'm in Ireland and its in geophysics.

Hi, I am currently applying for some PhD positions and am looking for a bit more information on what's involved. I know its a massive undertaking and will but a lot of work but what about the specifics. That is things like how do you go about planning what work to do, how often are you expected...

Homework Statement My understanding of entropy seems to be a bit flawed. I think of it as disorder. As an example consider a bag with a layer of salt in the bottom and a layer of pepper on top. If the bag is shaken the salt and pepper mix (move to higher entropy) and no matter how much you...