This section of the tutorial explains how to add sounds to the Pong game created previously. There are four types of sound effects: collision with the walls, collision with the bats, missed ball by the player (crowd laughter) and missed ball by the virtual opponent (crowd applause).

Chang, In your file the hard part is done. Animation is easy. You can put everything in one sheet just stack it vertically with a pitch of 100 rows for instance. I would however do this in a dynamic macro solution (copy-paste-in-a-loop macro) but for now for the next few days exhaust what you started. You’ll learn something well and have fun at the same time. Later you can do the dynamic version. Question: how long does your VBA need to fill a sheet like you sent me with numbers?

If worse comes to worst then you might need to put most of your calcs in worksheet formulas. What you have there is fairly small compared to what Excel can do. Say a 100×100 array of points on excel 2003 or earlier you must be able to do at least 10 in a second but more likely 100 in a second. The arrays might be large but the individual cell calculations are small which helps the speed. Your problem is manageable if you keep it within say 5,000- 50,000 points (this is a wild guess). You should absolutely use 2003 or earlier. The earlier the faster but 2003 is up there in terms of speed.

You centainly open my appetite for this. I will have something for you by the end of this weekend. But you go ahead and experiment until my schedule gets less congested.

Hi George

After reading dynamicmacro#1 tutorial, I can create an animation for my data. I simplied my problem and found the common things just like what you said.

My problem is I want to move a curve corresponding to my data. The following is a set of simple data

time x1(location) x2 x3 x4

1 0 1 0 0

2 0 0 1 0

3 0 0 0 1

Based on the macro in Dynamicmarco excel file, I make it. The number of changing cells are 5. One is time index, the others are 4 locations.

However, what if the problem is 2D? 3D? Can excel do that? Here is an example

time1 1 1

1 0

time2 1 0

1 1

time3 0 1

1 1

I am thinking if excel can do this. The no. of changing cells will be huge if 2D area is big. Also, it seems that the raw data at each time have to occupy one worksheet, so if there is a hundred time steps the workbook will contain 100 sheets? It makes thing complicated…

That is what I think, hope this will not interupt you. Thank you.

Chang, you just read it like everyone else, read the first 30 pages get bored then put it on the shelf until 10 years later when you try to sell it at a garage sale or just start a fire with it. In my opinion though, you don’t read a science book :-). You look a little through after you now the stuff well by experimentation and practice (can be modeling too) and you have 10000% self confidence. At that point you are “stealing” info from the book. The author has good reasons to be afraid of you. Know the high school stuff well. Not everything of course, about 70-80% you will never use. Ever. Know mechanics, electricity, heat. Do 1000 problems. Including the the ones given at the national and international olympiad. Also learn very well to integrate on surface and on volume. It’s elmentary but do few hundred of problems till you really understand it. You don’t need to know a lot. Know a little but very well and you can figure out everything by yourself.

Thanks George

I saved your reply and read several times. I think a lot about what you said.

That is also new to me just like Excel Animation. You are right. I always forget almost things I have learned from one course after exam, so do my classmates around me… When I try to remember what I have learned from that course, I always feel sad at that moment because I give all knowledge back to school. Although same things happened to other people, I am worried about it because I feel I know nothing. I always tried to remember and understand the knowledge from book, but you know my curiosity disappeared gradually whenever I met the crazy math and complex description. I am thinking what should I do, just like I am getting things while I am losing things at the same speed.

I think you give me a good suggestion “try to solve a EXTREMELY simple version (1D- 3 time steps for instance) first. Always find a basic spatial or mechanical analogy to your problem.” Could you tell me how do you read science book? In order to having no fears of equations and complicated things in book, what did you do?

I know it will take your time, so sorry for that. But you really give me inspiration today. Thanks a lot.

Thanks for the quick feedback. I have my daily due work but as a hobby I am working at your problem. I will however warn you that I keep away from solutions from other people no matter who those are, some teachers, Newton, Crank-Nicolson etc. You are probably young. At your age I was just an ignorant sheep. As I matured I realize that the most important asset is not some book, research papers, school, teachers or any study. The most powerful asset was always in my head and I didn’t use just like all the other sheeps around me. Reading, studying, formal methods, classifications, getting info from teachers simply destroy your curious and enthusiast ignorance. Those things make you an erudit parrot. A graduated parrot. Ignorance and curiosity can solve any problem (if you just try to use it). On the other side there are the ignorants who never trust themselves and never try to solve anything by themselves. You need to take the middle path and get some very basic background but most of your learning needs to be done by playing (on Excel for instance) and solving problems by trial-tinking and error. Don’t rush. Take 1 hour 10 hours or 100 hours to solve a problem by just thinking and trying. It is not a waste of time, on the contrary it is a much better spent time than reading what other people did or listening to some older parrot (read teacher) how to do it.

As a technique try to solve a EXTREMELY simple version (1D- 3 time steps for instance) first. Always find a basic spatial or mechanical analogy to your problem. Something you can just run it in your head while you take the bus or drive or sleep. At the most you need is a purchase receipt and a pen to sketch 3 lines of a simple drawing but you should mostly be able to take all the problem with in your head wherever you go. Screw the complex equations, methods, books, classifications (implicit-explicit etc). Those are your only enemies. The challenge in the problem is your true friend. After you solve the very simple problem it means you TRULY understand the real life physics and not just some Mickey-mouse Greek letter scribbling on a paper from a class. After that increase complexity add some colors. Then after you feel even more comfortable with it add some animation. Then after that you are even better at it and you like the problem even more, then add one more dimension. Then combine this with some other phenomena. At this point go and read the universally sheep-approved theory. You will need between few seconds to few minutes to understand it and perhaps realize what is of value and what is just crap in the official theory, maybe even improve it. As opposed to the others you will understand the essence of the matter while other people’s understanding remains limited at the package or shell level (they barely scratched the surface by starting by playing formula-puzzles). Those guys forget that stuff next day after the exam whereas you can go on a deserted island, not worry about the problem for 10 years, then one morning remember it and manage to solve it within few hours of scratching on beach sand with a stick (you will need few hours still since you forget more details with time). Of course you might be asking, but what about that prosessor he is a guru, the other teacher really knows it. I look like an ignorant compared to them. I spend many years in grad school and in industry and I tell you, those are the guys who would have forgotten all the science in the drunk orgy after the exam but they just got a job in which they needed to recant that song and their parrot-list of words and Greek notations every day.

Thanks George

Actually this problem don’t need animation. I just want to create animation for that by myself. So, you can teach me at any time you are convenient.

Besides, sorry about missing parameter in the excel sheet. I will describe the problem again later. Thanks a lot.

Chang, I believe what you you have here is

diffusion equationwhich applies to heat transfer too. Transportation equation, from what I read, applies to logistics (roads and vehicles) and optimum ways to carry freight between various points on a map. I need to study your problem since I never did diffusion before. Initially I thought you had a table with a parameter that I could vary to animate but you just have numbers from VBA. I cannot animate that without some parameter to change. Lesson#0, never use 1 mile long VBA code. You can do the same thing in Excel and 10 times lighter and easier. You still need VBA but perhaps 3-5% of what you have here just to run a parameter loop. Let me analyze the problem more and I’ll come up with more details. When do you need the animation?Hello George

Your work is amazing. It is really new to me. You are so unselfish to share your knowledge, thanks a lot for that!

If you don’t mind I want to talk about the problem I want to solve. Thanks for your patient 🙂

I have calculated numerical solution for a transportation problem by solving PDE using VBA (this problem describe how a variable changes with time and location, for example contaminant in a flowing river is convected by the fluid and diffusive by itself.) and then I generated charts for those calculated data. Actually this problem is one of my homework, I have done it. But I am thinking can I create an animation for that?if I can do, the data will be interpreted perfectly. So I google “Excel Animation”, although I thought Excel cannot do that… However, I found some resources and finally was abstracted by your blog. You don’t know how excited I am after reading some pages on your blog…

Hope you forgive me for this boring story : )

So here is my question, can I make that data move forward?(I want the charts in sheet to move as an animation). I have download some basic tutorial, could you give me a suggestion where should I get started? Thank you very much.

I sent a email to you and the attachment contained charts that I want to convert to animation. I am so sorry about my English…

Hope you have a good day.

Hi Chang,

Help me with this one. I am an electrical engineer and the only transportation equation I know, refers to semiconductors. Give me some more information.

Regards, George

Hello George

I should say this again.. Thank you for sharing your knowledge.

I want to create 1D and 2D animation by solving transportation equation. But I don’t know where to get started. Can you give me some suggestions? I will send you a email later to support@excelunusual.com

Thank you very much.