Maple Questions and Posts

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Hi everyone,

i want to find the solution(s) to the following equation numerically:

f:=1+x^2+1/100*abs(ln(3-4*x))=0;

But fsolve refuses to work, it just gives the input back. Setting Digits to a stellar value didn't help, i also tried different initial points. 

 

Thomas

 

 

 

 

As the subject says, how do i solve an augmented matrix step by step so i can follow each change in the matrix. The augmented matrix is two 3x3 matrixes put together with the operator (<A|B>]. I hope yoy understand my "Swedish English".

Kefil

<p>Hey,</p>
<p>I've got this function:</p>
<p>f(x) = (x + y)(x^2 + y^2)</p>
<p> </p>
<p>By applying the product rule by hand I get the following partial derivative (with respect to x):</p>
<p>df/dx = (x^2 + y^2) + (x + y)2x</p>
<p> </p>
<p>I would expect Maple to give me the same result but instead I get the following:</p>
<p>f := (x + y)(x^2 + y^2)</p>
<p>diff(f,x) = 2*(D(x))(x^2 + y^2)*x + 2*(D(y))(x^2 + y^2)*x</p>
<p> </p>
<p>This has me a bit stumped so I'm hoping someone is able to help me out.</p>
<p>Thanks in advance.</p>

I have a problem and hope, anybody can help me with that.

I have density data dependig on temperature and pressure. The data are stored in an excel file (in a square block - see attachment). Is there an easy way to import this data in Maple, that I can use several values of the density at given a pressure and temperature? Maybe comparable with a table (or matrix) where you can pick out indexed values, e.g. rho[temperature,pressure].

My current solution is to write a procedure, but before that I would like to know if there is an easyer way.

How can I change the fonts used to create the legend for a plot?

What I really want to do is increase the font size. I can do this for the title, labels, and axes - but not for the legend. (At least I don't see how to do this in the online help.)

Before I start digging through the code, I thought I'd see if anyone here has dealt with this previously.

Doug

I'm trying to plot 1/2*L*(14.4/(1.5+R)^2<=423e-6.  My L ranges are L=757.4e-6..1135.1e-6 and the R ranges are R=13.85..15.95.  I'm trying to filter some pumps based on their inductance and resistance, and they need to fall under 423 uJ.  I looked at some implicit plot commands but didn't see exactly what I needed.

 

Thanks!

Here is a recent session on Maple 12.1. The exact thing happens on Maple 11.5. I define a vector x , Maple acknowledges the fact but then if I ask if x is, in fact, that vector it says no. Any idea of what is going on? with(LinearAlgebra): > x := Vector(2, [1, 0]); Note Maple correctly prints transpose [1 0] on screen. [1] x := [ ] [0] if x=Vector(2, [1, 0]) then 7 else 3 end if; 3 is(x=Vector(2, [1, 0]));

Hi,

I'm trying to solve a system of equations in a matrix. The matrix is of the form <(1/5)*sqrt(6)*c[3, 1]+(1/7)*sqrt(6)*c[3, 3],0,(2/7)*c[3, 3]*c[3, 1]+(2/9)*c[3, 3]^2>, which I want to equate to <0,0,1> to simultaneously find numerical values for c[3,1] and c[3,3]. I then need to take these values and imput them into a bigger matrix and repeat; I think I can do that but I'm caught up on this part. I've tried various commands from linalg, LinearAlgebra and Student[LinearAlgebra], with very little success.

Any help would be very much appreciated.

Hi, i have a rather basic question. Both code pieces do the same:

restart:
 for i from 1 to 5 do  a[i]:=i;  end do;

a[3];

3

restart:
 for i from 1 to 5 do  a(i):=i;  end do;

a(3);

3

 

In which case should  i use round brackets and when square brackets for indexing ?

Does it matter ?

 

Thomas

Hello

I have this problem:

I have two non linear equations with twos solutions (Ea and F in the picture)

I need the alpha that gives me the max Ea

How can I enter this in maple.

Thanks a lot!

I attach an image of the equations to be more specifyc

HI,

Does anybody know about this function, that is no more in Maple as a spécial function?  I search the web and I can't find the series that represent this function.  Is there somewhere a Maple's user who have program it so I can use it in Maple 12?

Mario Lemelin

If I do   5466!   I get a number with a bracket saying 17859 digits.  Okay so now I want to explore that number ....

When I right click and explore.  A little explore window pops up an that's it.  No exploration of the number what-so-ever.  How do I explore that number?

Hi all,

when using solve to solve a simultaneous equation e.g. " solve({6*c+d=24,6*c^2+d^2=96}; " I will obtain two solutions, or with different values maybe even more, I want to put the solutions into an equation e.g." c^6*d" and obtain the maximum value from all the sets of solutions I have.

Any help I will be very grateful, at the moment I am working out by copying and pasting but it will get much harder as the number of solutions increases.

Thanks,

Alex

hi everybody

Download 4125_Testdata.txt
View file details
I am trying to create a point plot from a data file, with the first two columns, x,y, and the third column as the error in y.

I can make the pointplot with the first two columns, but trying to add in the third colum for the Errorplot in statistics program is not working.  Is there a way I can use this third column of my data file to be the yerrors= part of Errorplot command?

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