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I run the following working maplet:



Where "muutujad" is a procedure I defined and which returns the three inputs in the form [TF1,TF2,TF3].

It works fine, but if I insert "theta" as input, it of course stays in the string form, not Θ. Even if I copy the symbol and paste it in the textfied, it doesn't accept the symbol. Is there any way I can convert the text input to actual symbol?

I have a vector of dimension n with each component being an equation of a linear system.

Can maple convert this Vector to a Matrix-Vector form with the matrix being constant coefficients?

Hello to all


I am Jorge Gracia an exchange student working on my Thesis.

I started working with maple recently, and I am having some problems to achieve the results that I am looking for.

My work consist in the next Steps.

Using maple and taking some fatigue tests data, create a wav file with the some of the following formats:

Supported data formats are wave type 1 (PCM integer Data 8 Bit unsigned, 16 Bit signed or 32 Bit

signed) and wave type 3 (PCM float data (32 Bit IEEE float).


In the same way, if I already have a wav file, read the values of every point of the wave in order to understand and study the results.


If I have a normal plot, convert it into a wav file plot with the formats from above

With all the results, I will be able to work with this wav files in a fatigue test machine achieving more realistic results than with the standard waves.


All the information about this will be welcome.


Thank you for all.

Does anyone know an easy way to convert %d_ to D? I tried the convert command, but no effect.  Thanks.



we can get the continued fraction of cot(x) with the command

> convert(cot(x), confrac, x, 6)

the result is


 convert(cot(x), confrac, x, 6)

how could I convert this result to a form like




Is there a way to convert this FDTD code into Maple

Hy(1 to M)=0;

Ex(1 to M+1)=0;

For t=1 to T,


For k=1 to M,



For k=2 to M,




Thanks in advance.

In Maple 11 we have:

> A := <a,b,c>:
> a := 1:  b := 2: c := 3:
> convert(A, list);
                                   [1, 2, 3]

In Maple 2015 we have:

> A := <a,b,c>:
> a := 1:  b := 2: c := 3:
> convert(A, list);
                                   [a, b, c]

Is that change really intended?



In a course I am looking at, the system of units is mostly in FPS.  Wich I never use.  But they ask sometime to convert it to SI.  But with Maple, I have a problem:

For Force, it use lb that I cannot convert into N

So what unit should I use to convert FPS to SI for the force.


I know that slug*ft*s^(-2) convert to N with no problem.


Thank you for your help.



Mario Lemelin
Maple 2015 Ubuntu 14.04 - 64 bits
Maple 2015 Win 7 - 64 bits messagerie : téléphone :  (819) 376-0987

Maple is providing answers with the gamma function and LambertW function.  I am not a math major.  Although I did take advanced engineering mathematics in grad school, I am not familiar with transcendental functions.  

I did look at some of the help.  I tried to use the convert command to convert to elementary functions, however it did not help.  I looked at the definition for the Gamma function, GAMMA(z), and the upper incomplete Gamma function, GAMMA(a,z) that uses the generalized hypergeometric function 1F1.  Looking at the generalized hypergeometric function 1F1 defintion, hypergeom(n, d, z), it references the general pochhammer function, pochhammer(z, a), and product functions, product(f,k=m..n).  This all seems way too complicated.  


eqn1:= R = exp(t/MTBF) * (t/MTBF) * sum(1/(i!), i=0..n);

exp(t/MTBF) * (t/MTBF) * Sum(1/(i!), i=0..n)

exp(t/MTBF) * (t/MTBF) * sum(1/(i!), i=0..n)


eqn2:= MTBF = solve(eqn1,MTBF);

solve(R = exp(t/MTBF) * (t/MTBF) * sum(1/(i!), i=0..n),MTBF)


Is there any easy way to convert to use basic functions like sum, int, etc.??

I am wanting to use the answer in Excel.  I have found some custom Excel VBA code that I could use to implement these non-standard function in Excel, but that seems like a lot of effort.

Lambert W function for Excel, work on real and complex number (VBForums)

Excel Add-Ins Incomplete Gamma Function (PC Review)


Update: Some more background on the problem is as follows. R is the expected reliability say 90%. MTBF is mean time between failures in hours. t is the time period of operation excluding allowable downtime. n is the allowed number of failures. I am looking to find the MTBF needed to achieve a certain required reliability, with the number of failures allowed, and the up-time operational period, being defined by the requirements as well.

To clarify the simplification does not necessarily have to be closed form, and an approximation would be acceptable. (in Excel I currently am using iteration over a number of rows, then using the Goal Seek tool to find the MTBF, however this is less than desirable to have to do everytime when looking at different trade studies) I am not that familiar with how to use assumptions in Maple, and do not know what would be the appropriate assumptions to make when simplifying. Thanks for your help.

At the first note that in this question all polynomials have parametric coefficients. Let F be a list of polynomials and f be a polynomial. I want to convert F and f into a linear homogeneous FF and ff resp. At the first I want to sortvthe monomials appears in F and f  w.r.t. a monomial order T and then replace by the new variables A_i.

For example if


(a,b,c are parameters and x,y,z are variables) then I want to convert F and f into FF and ff resp:

please note that the variables appears in F and f are:

where sorted by T=plex(x,y,z). Please note that we consider all constants and alone parameters (4, b-4, c-1) as A9. I want to convert v into

and then F into FF and f into ff.


How to express sin(-(1/6)*Pi+(1/2)*arccos(1/3)) in radicals with Maple? The use of the applyrule command is not desired. Here is one of  my tries:
>convert(expand(sin(-(1/6)*Pi+(1/2)*arccos(1/3))), radical);


please help check what's wrong with this code. I need the analytic solution and convert to Bessel but return error. Here is the worksheet

Best regards.

I'm looking at Maple as a possible alternative to Mathcad (which I've been using for years, but is now very jaded compared to other options like Maple and Mathematica).  I'm a civil engineer and for what I do, one of the better features of Mathcad is the way it handles units.  For example, if I specify an angle in degrees (say phi=30 degrees) and then ask for sin(phi), I get 0.5.  At face value, I though Maple would do the same kind of thing.  However, this doesn't appear to be the case (see attached worksheet).  The only workaround that I can see is to specify the angle in degrees (but without assigning ) and then multiply the specified value by pi/180 (to convert to radians) before passing it to the sin function.  Which is all a bit messy and not at all an attractive solution.

Am I misunderstanding the way units work in Maple and is there a clean way of specifying angles in degrees (which is what engineers work with) and using these values directy in trig functions?

Thanks in anticipation,


 when i  input  bellow


  • Maple can output




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