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feynman feynman


Last seen: 4 days 前 |  自 2020 起处于活动状态

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提问


call function name in the same function
In a function, I need to run this function somewhere within the function like function fun i=1 if i>1 function name ...

5 days 前 | 1 个回答 | 0

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提问


Save and load models in phase plane app
Though there are Save and load buttons in phase plane app, I don't think they work. I never find any models saved.

9 days 前 | 0 个回答 | 0

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提问


uicontrol doesn't work in Matlab 2023a
figure;pauseButton=uicontrol('Style','pushbutton',... 'String','pause','Position',[2000 60 100 100],... 'Callback',@(s...

10 days 前 | 1 个回答 | 0

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提问


vectorization examples for efficiency
I wonder if the following expressions are already optimized forms for computational efficiency and if not how to rewrite them? ...

2 months 前 | 1 个回答 | 0

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提问


multiple actions following @(src,event) in uicontrol
How to add another action or function to the following Button=uicontrol('Style','pushbutton', 'String','pause','Position',[1800...

2 months 前 | 1 个回答 | 0

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提问


Smart way of adding paths
For those using multiple PCs, it is necessary to use a smart way of adding paths. How is it possible to add paths like: a='c:\...

2 months 前 | 1 个回答 | 0

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提问


role of flux f in bcfun of pdepe for systems of PDEs
To solve utt=uxx, as the flux term f has a 0 entry in pdefun, the same f is in bcfun. In bcfun, there's q(x,t)f(x,t,u,ux), which...

2 months 前 | 1 个回答 | 0

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提问


functions don't take effect
When calling a function involving multiple other functions where some changes are made, new changes don't take effect even when ...

2 months 前 | 0 个回答 | 0

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提问


uicontrol to start over a loop
uiwait/uiresume through uicontrol can be used to pause/continue a loop. Is there a corresponding ui+... to start over a loop fro...

2 months 前 | 1 个回答 | 0

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提问


concatenate multiple 'OutputFcn' options in odeset?
Is there a way to output both odeplot+odephas2 after modifying the following? options=odeset('OutputFcn',@odeplot,'OutputFcn',@...

2 months 前 | 1 个回答 | 0

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提问


3D plots rotated in live scripts
It seems that once 3d plots in animations are rotated, the animation can't be replayed again, for the control slider automatical...

2 months 前 | 1 个回答 | 0

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提问


animation turns static in live scripts
I have the following code that works well in m files but not in live scripts because a figure pops up in a separate window and t...

2 months 前 | 0 个回答 | 0

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提问


if nested functions supported in live scripts
Are nested functions supported in live scripts? Otherwise, global variables have to be declared as global?

2 months 前 | 1 个回答 | 0

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提问


how to output quantities involving time derivatives in pdepe
pdeval only seems to output the solution and the spatial derivative of the solution via [~,dudx]=pdeval(m,x,sol(i,:,1),x). It se...

2 months 前 | 1 个回答 | 0

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提问


why does pdepe adopt Petrov-Galerkin?
pdepe is meant to solve parabolic and elliptic PDEs. Petrov-Galerkin seems to be designed to solve convection dominated ones, wh...

2 months 前 | 0 个回答 | 0

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提问


how to output quantities within pdefun, bcfun, icfun in pdepe
How to output quantities within pdefun, bcfun, icfun in pdepe? e.g. in pdefun: function [c,f,s] = heatcyl(x,t,u,dudx) c = 1; ...

2 months 前 | 2 个回答 | 0

2

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提问


unable to adjust real time views of surf plots in plot-drawnow animations
In plot-drawnow animations, how to use the mouse to adjust the view of a 3d surf plot? I've found that there's no response to an...

2 months 前 | 1 个回答 | 0

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提问


time integration in solvepde (=pde toolbox?)
solvepde (=pde toolbox?) seem to be based on finite elements. If so what time integration (ode23 etc) is adopted?

3 months 前 | 1 个回答 | 0

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提问


different PDEs to solve through events in pdepe
There is a model defined by a pointwise PDE solving for u(x,t), i.e. it is PDE1 when u(x,t)>0 and PDE2 when u(x,t)<=0. Can one u...

3 months 前 | 0 个回答 | 0

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提问


how to change time integration in pdepe
ode15s is used in pdepe. How to change it to say ode23 etc when in need?

3 months 前 | 1 个回答 | 0

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提问


How to stop loops or close figures in live scripts
I wanna use live scripts to run a loop updating an animation because this will allow to playback the animation. In the normal co...

3 months 前 | 1 个回答 | 0

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提问


stop animations with pause()
I wanna stop/break/suspend the following animation without using ctrl+c, how? for i=1:10 plot(linspace(0,1),linspace(0,1)...

3 months 前 | 2 个回答 | 0

2

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提问


plot style of 'OutputFcn'=odeplot in odeset
The following code can plot the solution of the ode with 'odeplot' rather than using 'plot'. options = odeset('OutputFcn',@odep...

3 months 前 | 1 个回答 | 0

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提问


pdepe/pde1dm's vectorized option
In pdepe, when vectorized is turned on, the elapsed time is the same as that when vectorized is off. Why no improvement? The ...

3 months 前 | 0 个回答 | 0

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提问


pde1dm with coupled ODEs
According to the pde1dm manual, pde1dm with coupled ODEs has to do with three additional arguments to the pde1dm function: [sol...

3 months 前 | 1 个回答 | 0

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提问


ode23, 45, 15s, 15i for conservative ODEs
Which of ode23, 45, 15s, 15i are dissipative or anti-dissipative for conservative ODEs?

3 months 前 | 1 个回答 | 0

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提问


pde1dm compared to pdepe
pde1dm is an extended version of pdepe and it can solve equations pdepe can't solve. I wonder about the differences between thes...

3 months 前 | 2 个回答 | 0

2

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提问


Spatial discretization in pdepe compared to others
The spatial discretization in pdepe seems to be a unique one. Could someone please explain it briefly so that it is understandab...

3 months 前 | 0 个回答 | 0

0

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提问


whether meshes affect computational step lengths in pdepe
In pdepe the user specifies an xmesh and tmesh. Do these meshes affect what meshes and computational step lengths adopted by the...

3 months 前 | 1 个回答 | 0

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提问


why 'parabolic' and 'hyperbolic' not recommended for solving PDEs
why are 'parabolic' and 'hyperbolic' not recommended for solving PDEs and instead 'solvepde' is recommended? Aren't they all bas...

3 months 前 | 1 个回答 | 0

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