For Question 2, you can enter a underscore character in -D input by entering _ directly, for the 2-D input, you will need to enter \_.

For Question 3,  Idon't think there is any shortcut keys for converting text that are selected.  The only two options are to use the right click menu (select to text, right click and go under the 2-D Math menu) or from the Format Menu.

Scott
Maplesoft

These "wiggles" that you have been mentioning looks like it is caused by the location of points that are being used for each frame are not the same.  It might be solved by increasing the number of points being used.

-Scott

In Maple 13 the following should work

V := (t) -> <5*t+1, -5*t^2+50>;
diff~(V(t),t);

or in a previous version of Maple the following should work

V := (t) -> <5*t+1, -5*t^2+50>;
map(diff,V(t),t);

Scott

I don't have any experience with Kalman filters, but in this Application Brief put out by Maplesoft, there is a section that describes creating a Kalman filter block for this Voice Coil controller.

Scott

Do you need a random variable so that each run it will change?  Or will the Random Data template that generates a table of random data that you can use with interpolation table satisfy this?

Scott

What do you want to do with that function?  Do you want to plot it?  If so you can enter the following command into Maple

plots:-implicitplot(3000*x+y=25000,x=8..9,y=-2000..1000);

Alternatively you can just type in the equation

3000*x+y=25000

Right click on the equation, choose Plot>2-D Implicit Plot> x,y

If you want to evaluate this equation at a point, right click on the equation, choose Evaluate at a Point then enter the numbe for either x or y and click ok.  Then you should right click on the result and choose Solve> Isolate and choose the remaining variable.

Scott

How about trying the complexplot3d?

f:=exp(2*Pi*I*t);

plots:-complexplot3d(f,t=-2-2*I..2+2*I);

Scott

You can put both the f as both the input and output for the dynamic systems object.  This will affect the block, since the component mask is when you specify the ports.

Scott

There are other commands that you can try like rtable_scanf and fscanf.  I usually find that readdata is a lot easier to use.  What error are you getting from this command?

Scott

Try the ImageTools:-Mask where you pass both image A and B to the procedure.  You can then use the ImageTools:-Preview to view the resulting image.

Scott

Try removing the line b:=a since I cannot see why you want to do this if you are on the very next line assigning an element of a to b.

-Scott

What sort of components are you using in your model?  Both the Analysis and Equations templates currently support continuous models.  If your model is continuous and you are still getting this error, could you send it into support and they would be able to take a look at it.

-Scott

The problem may be that this system is hard to solve symbolically.  Try changing the solve command to fsolve and on my machine it returned a result almost instantly.

Scott

I don't think the contourplot has the options to turn off the contour lines.  One option if you just want that fill, is to use the densityplot command.

>plots:-densityplot(-5*x/(x^2+y^2+1), x = -3 .. 3, y = -3 .. 3, axes = none, style = PATCHNOGRID);

Scott

In Maple, the fopen command includes a mode for APPEND.  This should allow you to write to the end of the file without wiping out the contents.

Scott