Could you take a screenshot of what you are finding? This will allow others see what you are finding. Scott

When I ran the code, I noticed two possible sources of some problem. First, in the last line you have values of 't'. To be able to plot something, you will need to specify the values. The second source of some problems is the ',t,0,0' which doesn't seem to match with any of the commands. Were you wanting to plot a point or was this from a command that was deleted? Scott

The reason why you are not able to combine these curves and produce one plot is that you are mixing both 2-D and 3-D plots. Specifically, the clouds are defined in 2-D and the rest are 3-D plots. If you follow the first example from the 'plottools,transform' help page, then you can make a flat 3-D plot of the clouds. Otherwise I would suggest getting the equation of the 3-D sphere to create a plot with implicitplot3d. I believe the plot for the first cloud should be something like x^2/9 +y^2/4 +z^2/4 =1 One thing you may want to notice is that your tornado is a lot larger than anything else. As a result, when you plot the tornado with everything else, unless you use the view option to zoom into a section, you will not see anything else. Scott

Could you let us know what sort of system you are using, how much RAM is in this computer and do you remember the "Steady State" number? This could be useful in diagnosing the problem you are having. Scott

You could use the example from the Statistics,Fit help page. By using either the ImportMatrix function or any of the importing of the data to read in the file. For example if you had placed the 6 sets of data that is found in that help page in a file on you computer at C:\Test\Datain.csv the following would work: with(Statistics): DataIn := ImportMatrix("C:\\Test\\Datain.csv", source = csv): Fit(a+b*t+c*t^2, DataIn[1 .. 6, 1], DataIn[1 .. 6, 2], t); Therefore, if you know the form of the function is going to take, Maple should be able to fit it to the data. There are also other curve fitting routines that would also help in fitting the curve to the data. Scott Marketing Engineer Maplesoft

Please note that sets in Maple (as the help page for set states) are an unordered sequence. There for if you would like to set up and ordered sequence, I would use the list notation (the [ ] brackets). I am sure there is a procedure out there to do this but an easy for loop to find this is as follows: for i in List1 do if is(i, integer) then print(i); break; end if; end do; This can easily be set to a procedure with List1 as the input. Scott

If you check out this training video on creating a nice Maple document in Maple 11, there is a section near the end which shows how to create a document block and hide code into it (the code will be hidden as long as some output is created (like a print statement at the end that states that it is done). This will allow you to totally hide the code and will not open up. Scott

If you are in Worksheet Mode, the F5 key will switch between Maple Input and 2-D Math Input. In Document Mode, the F5 key will switch between Plain Text and 2-D Math Input. If you want Plain text in a region in the Worksheet Mode you can select Text in the drop down or you can select the T symbol at the top. If you use the Document Mode, there is a Training Video dealing with interspersing Text and Math in a document (Creating Documents in Maple 11 Scott Marketing Engineer Maplesoft

On Maple TA's help page for $, it states: "The use of the $ is reserved for variable definitions in algorithms in the Maple T.A. question syntax." Scott

Depending what is in the '...' within the PLOT3D() call, you should be alright. Just on the next line execute plotC; That message is just the code for Maple to create the plot. This comes up when you assign a plot to a variable. Scott

If you change the typesetting to Extended, you can also get the output you are looking for. For this case gamma and GAMMA will give give greek characters in the output but Gamma will only produce the greek letter if you use command completion (CTRL+Space). You can change the type setting either by going to 'Tools>Options>Display' or by executing interface(typesetting=extended); Scott

I cannot see exactly what is going wrong and I believe that the post may have been formatted differently than what Maple is receiving. Could you upload the worksheet an let us know what version of Maple you are using? Scott

The easiest to produce the 3d plot that you are looking for is the spacecurve function. You will need to sub in all the values for the function instead of one variable which you wish to plot against. Fr example: plots:-spacecurve([(10+3*cos(2*t))*cos(t), (10+3*cos(2*t))*sin(t), 3*sin(2*t)], t = 0 .. 10, numpoints = 1000); To make it easier to change the variable, you can create the following function: F := (R, r, n, t) -> [(R+r*cos(n*t))*cos(t), (R+r*cos(n*t))*sin(t), r*sin(n*t)]: Then you can do something like to following to get multiple plots on one by varying the n: p1 := [seq(plots:-spacecurve(F(5, 3, n, t), t = 0 .. 10, numpoints = 1000), n = 1 .. 160, 80)]: plots:-display(p1); Scott

That indication is letting you know that your Maple ranking has increased as a result of that post. Some more explanation is found here . You will see that by posting a forum topic (or responses/comments) you get 1 point, 3 point for starting a blog and 5 points for a book. You should also see the number beside everyone's name increase as they post more on Mapleprimes. Scott

If you try this same function in the Worksheet mode (or just expand the document mode), you will see that that right click and "Add an initial condition" menu choice will execute: initialcondition[y(x)](diff(y(x), x) = 0); To be able to see what is being done, check the ?initialcondition help page. I actually think that the best choice that you should choose is to select "Solve DE Interactively". This would allow you to set the initial conditions easily and solve the DE either symbolically or numerically. Scott