Hi all,

How to plot and animate an expression like this:

f:=x1+a*y1+1; plots[animate](plot, [f, x1 = 0 .. 5, y1 = 0 .. 25, y=0..10],a=0..1, frames=100);

This is just an example for understanding my need.

thanks for help

Hello! Im kinda new to maple so it must be a noob question :) im using it for like 24 hours to get around some basing math in it :)

Just got some understanding of this 2d/1d/worksheet/document modes and stucked at some operations with fractions.

1) How do i enter Mixed fractions to calculate right?

2) How to compare Two or More fractions? 

3) How to get output in mixed fractions? or to expand fractions.

Hi all,

I needed to create assumed variables for a problem I´m working on. After working on them in a last step I need to replace the assumptions with values so as to get a real number. - I don´t want to define values to the variables from the beginning as I want to avoid rounding errors and I don´t know any other way around the problem.

Giving you the exact problem would be bit too complicated, but you might get to know what I would like to do with this example:...

Hello,

I am currently trying to build some procedures in Maple that calculate the Legendre-Fenchel transformation for functions that are convex, nonconvex, differentiable and non-differentiable functions. I seem to be ok in the convex case, but cannot seem to find a way of getting Maple to calculate this transformation symbolically for nonconvex functions (both differentiable and non-differentiable). It appears to me that the only way to deal with these cases is to...

I'm finding limited information on how to do row or column operations on Arrays.  For example how to multiply a whole column by one number.  I have tried using the map command .... 

map(a->[a[1],-3*a[2],a[3]],a)  # multiply the third row in the array by -3 however brings an error.

This doesn't work for Array however it works on lists.  At the moment I can't think of how to do it without converting it to a list.  Any ideas?

I thought this would be simple enough, but I can't seem to get this to work...

If I have the following...

> e1 := fsolve({Qd, Qs1}, {x, y});
                       {x = 60., y = 40.}

Then how can extract the appropriate numeric format to plot this point? I keep getting data type errors.

Any help would be much appreciated!

I'm trying to plot an arrow in polar coordinates.  Here's an example for an arrow who's base is at (1,Pi/4) pointing right with unit length.  It seems like the coords option is being ignored by plottools[arrow].

The following lines give me the same results in Maple:

plots[display](plottools[arrow]([1,Pi/4], [1,0], 0.05, 0.1, 0.1, coords=polar));

plots[display](plottools[arrow]([1,Pi/4], [1,0], 0.05, 0.1, 0.1));

Is this a bug?

Kevin

Is there also possibility to view the source code of Plot Builder?

Hi

My Maple 13 puts small curly brackets to the left side of an expression and this causes several problem for me. What should I change to write good ones? (I mean normal, big brackets, not small brackets to index.) (I use the AltGr+b combination to write a left curly bracket.)

Hi all 

I very very new to Maple so please forgive me if this not a great question.

I'm trying to input the command lfsrlength(v,n) to calculate the determinants mod 2, however Maple is just returning the command and not the determinants please see below

L101;  [1, 0, 1, 0, 0, 1, 1, 0, 1, 1, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 1,
        1, 1, 0, 0, 0, 0, 0, 1, 0, 1, 1, 1, 1, 1, 1, 0, 0, 1, 0, 1, 0,

I'm trying to get a blank procedure call to work.  How can I go about doing that?

I wanted to do something like this

changedir:=proc(change)
  if change=NULL then currentdir("f:/") else currentdir(change) end if:
end proc:

changedir()
Error, invalid input: changedir uses a 1st argument, change, which is missing

Hi,

Can someone help me out here, is it possible to select a column from a matrix result in maple.

for example using the Eigenvector(M) command lets say i get the result

                                                ...

How can I find out how many positions there are in a table? 

I have this equation:

When I atempt to solve for this is the answer I get:

i wan't to compare the result with x1(t)=x2(t) of two ode,then modify v1,v2 in the form diff(x1(t))=v1,diff(x2(t)=v2 ,but the triger seem's fit to either one  of x1(t),x2(t), thus the action can't  excuted on the both,who can help me .