@acer Thank you! It's the little things :) This should conveniently do the trick for me. I will use that from now on.

@Markiyan Hirnyk Done.

@PatrickT 

Hi ,

I've been searching for hours, looking for the syntax to control the speed of the animation in maple within the code, and stumbled upon your post. did you have any luck finding a solution?

Cheers,

@PatrickT 

Hi ,

I've been searching for hours, looking for the syntax to control the speed of the animation in maple within the code, and stumbled upon your post. did you have any luck finding a solution?

Cheers,

Thanks Acer, and yes this is extremely helpful.

But since somewhere deep in code there must be an analytic interpolation at least locally at each point, it would be much faster (and more accurate) to differentiate that analytic expression. So do you know of a way do that? The reason I'm asking is because I am eventually plotting the gradient field of the sums of squares and cubes of second derivatives of the array interpolation (effectively 3rd order partial derivatives). So although evalf@D does work, it takes forever.
Thanks again for the timely response as always 

Thanks Acer, and yes this is extremely helpful.

But since somewhere deep in code there must be an analytic interpolation at least locally at each point, it would be much faster (and more accurate) to differentiate that analytic expression. So do you know of a way do that? The reason I'm asking is because I am eventually plotting the gradient field of the sums of squares and cubes of second derivatives of the array interpolation (effectively 3rd order partial derivatives). So although evalf@D does work, it takes forever.
Thanks again for the timely response as always 

Thanks, this is excatly what I needed. Unfortunately, it seems that if I use the procedure option, the events option does not work anymore. Is there a way around that? I could manually terminate the integration by adding an if statement in the procedure when defining the system, but it would be great if i could still use the built in events option. you can check this file for a specific example of what I need.dsolve-events.mws

Thanks again.

Thanks, this is excatly what I needed. Unfortunately, it seems that if I use the procedure option, the events option does not work anymore. Is there a way around that? I could manually terminate the integration by adding an if statement in the procedure when defining the system, but it would be great if i could still use the built in events option. you can check this file for a specific example of what I need.dsolve-events.mws

Thanks again.

thanks for the help plotting the vector field. Now i need to plot the field lines or the flow lines, and I hope you can help.

here is a link to the new question I just posted:

http://www.mapleprimes.com/questions/123421-How-Can-I-Use-Dsolvenumeric-With-A?sq=123421

Cheers,

thanks for the help plotting the vector field. Now i need to plot the field lines or the flow lines, and I hope you can help.

here is a link to the new question I just posted:

http://www.mapleprimes.com/questions/123421-How-Can-I-Use-Dsolvenumeric-With-A?sq=123421

Cheers,

Hi Jakubi,

I have just posted a question on mapleprimes, and noticed that you have helped someone with a similar problem (the one posted above). my problem is the exact opposite, but thought you might have a quick answer.
here is the link to my question:

http://www.mapleprimes.com/questions/123421-How-Can-I-Use-Dsolvenumeric-With-A?sq=123421

Cheers,

Hi Jakubi,

I have just posted a question on mapleprimes, and noticed that you have helped someone with a similar problem (the one posted above). my problem is the exact opposite, but thought you might have a quick answer.
here is the link to my question:

http://www.mapleprimes.com/questions/123421-How-Can-I-Use-Dsolvenumeric-With-A?sq=123421

Cheers,

example.mws

Here is an example of the problem I am facing. I did not know that you can attach files in this forum.

In the attached file, I showed first the different ways that fieldplot will NOT work even though evaluating at each point works just fine, with few comments every few lines. Only the last method at the end of the maple worksheet successfully plots the fieldplot I need.