This is mainly an aesthetic thing, but I'm finding an interpolating quartic polynomial given some data points, so I set up a Matrix system of linear equations etc, but I want the output solution vector (i.e. the solutions for the coefficients of x, x, x, etc.) to be to 3sf. I have tried putting evalf[3](LinearSolve(A,b)); but that doesn't seem to work. Even if I change Digits, (which isn't ideal anyway as I only want output to be to 3sf temporarily) the values in the vector solution are still to 10sf.

Dear all,

In the attached file there seems to be a little calculation bug.

Simply let the file run through. In the fourth line from the bottom CSBt equals a number greater than zero. I copied the same expression in the file's very last line. There the result of CSBt is zero.

The identical expression gives two different results. The "correct" result is zero.

It seems to me that the file is somehow damaged. Has this happened to anyone before and what can you do about it?

Many thanks for your help!!

Florian

I would like to print on the screen

where is a variable which obtains its value from calculation, and is a string only.

I tried 

T:=2;

Error, unexpected relational operator

Is it possible to solve this problem?

Sandor

I have a procedure

smth:=proc(T::positive)

bbbb;

end proc;

When I type  

smth(Pi);       or     smth(pi);    

I obtain the error message

Error, invalid input: smth expects its 1st argument, T, to be of type positive, but received pi

How can i give the Pi/pi to T  if I want to keep  the T::positive  ?

(evalf is not acceptable.)

Sandor

How do I add a new line in the middle of an existing execution group without using split/join commands in Maple 11.

What is wrong in here, please help:

dustplot0:=(points)->odeplot(duffing, [x(t),y(t)], 0..(2*Pi*points), numpoints=points);
plot1 := dustplot0(100):
plot1;

plot2:=PLOT(POINTS(op(op(1,op(plot1))),COLOUR(RGB, 0, 0.2,0.5),SYMBOL(POINT))):
plot2;
Error, invalid input: op expects 1 or 2 arguments, but received 3

I do not understand the reason for this error.

Thanks
 

My problem is that Maple does not give answer at all for the initial value problem, so I need a help. If does exist a solution how can I obtain it?

Thanks in advance,  Sandor

infolevel[dsolve]:=5;
                                      5

What is the (symbolic) equivalent in Maple for

   [ V  D ] = eig( A, B, 'chol' )

for given matrices A, B ?

Hi!

I was trying to install Maple11 on my computer (Windows Vista Home Premium, 2GB on RAM) but I cannot do it, when I executed maple11windowsinstaler.exe appear this message:  "Installer user inferface mode not suported": Unable to load and to prepare the installer in GUI mode... Why appear?? I need to intall maple as quick as possible. I tried to run the installer with  "run as administrator", but i cannot install.

Please, help me!!!! =(

I'm a teacher and I'm teaching my students about graphing trig functions. Well, they do not know about radians yet and I need to keep everything in degrees and would like to plot my graphs in degrees and show that the graph is in degrees on the axis, but I can't find a way to do this. Can anyone help me with this!

thanks,

Clinton

Hi,

I am trying to convert tan(z) to sum form using the convert(...,Sum) command and using some information from FunctionAdvisor.
The second operand of FunctionAdvisor( sum_form, tan) gives me the domain of validity.
I would like to use this info during the conversion as assumption, but it doesn't work for me.
(Of course, the first operand is the required sum form, I am just playing with maple).
Here is my problem:

Unfortunately piecewise() is a builtin so I can't see the library code.

I'm trying to construct a sequence of arguments to piecewise() programmatically, and to assign the result to a function but I just can't seem to set it up correctly.

I have a 10x18 matrix, each row of which will be used to define a piecewise linear function, so the columns in a row define the endpoint values of each line segment.

Essentially what I'm trying to do is the following (giving some Maple pseudo-code which doesn't work, but hopefully will get the idea across):

On page 99 of Dr. Euler's Fabulous Formula, Nahin says that:

int(int(`f`(s), s = 0 .. t), t = 0 .. x) = int(`f`(s)*(x-s), s = 0 .. x)

is true and I believe it, but I can't get Maple to confirm it.  How can I get Maple to agree with Nahin?  Are there assumptions that will make it happen?