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# Alexander Erlich

### University of Oxford

44 total contributions since 2008

www.airlich.de

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Submitted

Animated Double Pendulum
Show animation of the double pendulum's (mostly) chaotic behavior.

Submitted

animated spinning top with Cardan mounting
Plots an animated spinning top with Cardan mounting from raw animation data.

Posted

Extracting editable figure from GUI?
Hello, I am supposed to use a rather comprehensive Matlab program which operates in a GUI. The GUI produces great plots, but u...

6 years ago | 1880 views

Responded

Re: Getting 'currentPoint' only in one figure (while exluding other
Thank you, Justin, I accidentially flagged your reply as spam! It was not by purpose, I just misclicked! How can I undo this? ...

7 years ago | 3376 views

Posted

Getting 'currentPoint' only in one figure (while exluding other figures)
Hello, I am writing a program which creates different figures in the manner figure(1); plot(...); figure(2); plot(...); % etc...

7 years ago | 3376 views

Responded

Re: Solving an ode for multiple initial conditions simultaneously?
Thank you, Jan, for the clarification. But what still puzzles me is the 'vectorized' property of ode15s on which you hinted me...

7 years ago | 8836 views

Posted

Solving an ode for multiple initial conditions simultaneously?
Hello, suppose we have some ODE like, for example, the van der Pol equations as provided by the Matlab help. We have --------...

7 years ago | 8836 views

Responded

Re: nested loops including ode45: make code faster?
Thanks again Jan, I did my best to implement 1., 2. and 4., but there are still some problems. I have pasted the new m-files b...

7 years ago | 8332 views

Responded

Re: nested loops including ode45: make code faster?
Thank you Jan! I believe I know how to fix 1. and 2. But concerning esp. 4: if it is not too comprehensive/does not involve muc...

7 years ago | 8332 views

Posted

Which ode solver is the best for this problem? (Duffing oscillator)
Hello, because of the equations I typed my question in Latex and uploaded it here: http://www.airlich.de/Semester5/Fragen/Nich...

7 years ago | 2917 views

Posted

Large projects or open source projects in Matlab?
Hello, I have often consulted the Matlab FEX for interesting source code and ideas, but I was wondering whether there are any ...

7 years ago | 2659 views

Responded

Re: nested loops including ode45: make code faster?
If you try e.g. (this means you solve each ode45(...) for t=1 instead of t=100), the program is still remarkably slow. What m...

7 years ago | 8332 views

Posted

nested loops including ode45: make code faster?
Hi, I have written a program which uses nested loops in which an ode45 command is executed. Then, a dot of a certain color is ...

7 years ago | 8332 views

Submitted

vibratingString
vibratingString displays an animation of four vibrating strings with oscillation modes.

Posted

Rendering a movie with correct timing
There are two more things I would like to add: 1) In case it really works with the getframe function or another way of creating...

7 years ago | 1870 views

Posted

Rendering a movie with correct timing
Hi, I would like to create a movie with Matlab. I know there is a getframe function and I have tried it before, but I want to ...

7 years ago | 1870 views

Responded

Re: Bifurcation Diagram: more matrix operations to make code faster
Hi Thomas, thanks for your reply. If I am not mistaken, this kind of diagram was first created by Robert May (created only in...

7 years ago | 8425 views

Posted

Bifurcation Diagram: more matrix operations to make code faster
Hello, I've written a small function which creates a bifurcation diagram (like this one: http://en.wikipedia.org/wiki/File:Log...

7 years ago | 8425 views

Responded

Re: Bouncing object of arbitrary geometry?
Hi, thanks to your answers. I do not at all believe that the inverse spaghetti problem, or even the problem of a pending wir...

7 years ago | 2480 views

Posted

Bouncing object of arbitrary geometry?
Hello, I have often asked myself simulations where a stare cube, or even more complicated body, falls on a solid ground and bo...

7 years ago | 2480 views

Posted

Dragging a selection square on a plot?
Hello, suppose you have a figure with some plot. I would like the user to be able to drag a little selection square in some ar...

7 years ago | 1434 views

Responded

Re: Creating a movie with varying time steps
Thanks a lot Steve, it makes sense :-) It would have taken me ages to figure this out myself, I didn't know about deval! Now, ...

7 years ago | 1251 views

Responded

Re: Creating a movie with varying time steps
Thank you Steve, I will try that. But I still have a question: Suppose I had equally- spaced time steps. Getframe won't know ho...

7 years ago | 1251 views

Posted

Creating a movie with varying time steps
Hi there, suppose I have a solution of a differential equation which I would like to visualize with surf. The numerical solutio...

7 years ago | 1251 views

Posted

Recording a movie: Consider time intervals between frames
Hi, in my program, I am creating a surf plot and then updating it frame by frame. I would like to record a movie from it. I've ...

7 years ago | 1327 views

Posted

Plots with bad Anti-Aliasing, small resolutions
Hello, I am running Matlab 7.4 (R2007a) Student Version on Ubuntu 8.04, but also tested the same Matlab version on Windows XP. ...

7 years ago | 4611 views

Posted

Several surf's combined with hold on/off - lighting issues
Hello, I am writing a program in which I create a 3D plot of an object consisting of several single parts. Here's an image: ...

7 years ago | 5594 views

Responded

Re: Virtual Reality Toolbox: rotation using matrix?
I really don't want to insist, but could it be that one of my toolboxes is not complete as I have a student version? How can th...

7 years ago | 3071 views

Responded

Re: Virtual Reality toolbox on Ubuntu Linux: Cannot load the VR client
If I gave too little information, maybe this will help: EDU>> vrcar ??? Cannot load the VR client module. libGL.so: cannot open...

7 years ago | 2818 views

Responded

Re: Virtual Reality Toolbox: rotation using matrix?
Thank you Arkadiy, but my Matlab help does not know the command "vrrotmat2vec", although I could easily find it on the Mathwork...

7 years ago | 3071 views