## Help needed for...

I hope someone can help me. I am using Maple 10 to make a model of some of my research on fruitfly dorsal-ventral formation. I am far from a math and maple expert, so i hope someone in here can help me. I have plottet my data with pointplot3d and need a function i can fit to to my data. Have tried with one time-frame at a time, using fit[leastsquares], but don't get a good result. Have a lot of "noise" on my measurements, that probably wont give a good result, I therefore need a full 3d fit. The data seen from (y,z)-axis is increasing "shark-fin" pattern: ....................................xxxxxxxxx

hi all, i have an equation like this: a = Lambda[d]/(Lambda[d] + Lambda[in]); P(0, 0) = 1/(k + (Lambda[in] / Mu[in]) * (k - 1) + (Lambda[in] / Mu[m]) * (k - 1) + a* ((1 - a^(n - k)) / (1 - a)) + (Lambda[in] / Mu[in])* a * ((1 - a^(n - k)) / (1 - a)) + (Lambda[in] / Mu[M]) * a * (( 1 - a^(n - k)) / (1 - a)) + (Lambda[d] / Mu[D]) * a^(n - k)) Availability (A) = P(0,0)*(k + (a * (1-a^(n-k)))) i want to find the optimal Lambda[in] which max the A.. is there any non-numeric solution way and plot A-Lambda[in] graph?

## Help with this problem...!!! Please...!!!...

I have benn assigned to do this: Set up a Double Loop in Maple with the parameter "A" running from 0 to 2 in steps of 0.02 and "B" running from -1 to 1 in steps of 0.02. Within the double loop, set Xo=A+BI and compute 10 Newton's Method Iterates. Now I don't have a clue how to solve it but I have been trying, It seems to me that I always head to a dead end solution.... By recommendation I have done this but I get stuck; I don't know how to do the double loop from this domains. I'm gonna write it down or if you want you can see it with the link below. > restart

## Complex numbers...

Hi everyone, I'm a newbie at Maple and am building a model for the transmission and reflection of EM waves in layered media. I'm trying to separate something like: R[s] = (-I*sin(q[m]*l/Z[m])*Z[1]*Z[t]-cos(q[m]*l)*Z[1]+cos(q[m]*l)*Z[t]+I*Z[m]*sin(q[m]*l))/(I*sin(q[m]*l/Z[m])*Z[1]*Z[t]+cos(q[m]*l)*Z[1]+cos(q[m]*l)*Z[t]+I*Z[m]*sin(q[m]*l)) into complex and real parts. Re and Im don't seem to work. In fact if I take an equation like: f:= cos(x) + 2*sin(4*x) and run Re or Im on it, it doesn't seem to work. Any assistance would be much appreciated! Thanks,

## How to do an array?...

How can I do an array in maple? Tanks...!!!

## I using a double to solve a equation...

his is the eqaution given X=a+bI and my proffessor want this to be inside the double loop. variable a is from 1 to 2 with a interval of .02. the variable b is from -1 to 1 with a interval of .02. this is what it should look like for a from 0 by 0.2e-1 while a

## How do I do double loop?...

Hi my name is Franklin and I'm student in NYC. Now I'm doing a project assignment from my math professor. He didn't explain to us how to use the maple 10 at all. Now I come here to look for help. How I set up a double loop with the parameter "A" running from 0 to 2 in steps of 0.02 and "B" running from -1 to 1 in steps of 0.02? How I set the Xo=a+bI within the double loop? How I can compute the 10 Newton's method iterates? For me it is difficult but maybe for you guys this will be easy since you all are experts in it.... Best Regards, Franklin

## Densityplot with imaginary values...

Hello, Is it possible to use the densityplot function with imaginary values? I've tried with numerous functions, and all it ever seems to output is a solid black field. Any help/suggestions/links to resources would be -greatly- appreciated! Thanks! Joe H.

## How to solve a boundary value problem!...

I need to solve following ODE: ODE:= y(f)*(diff(y(f), f, f))+50.0*f -50.0*f^2= 0 Subject to boundary conditions: BC:= (D(y))(.5) = 0, y(0) = 0 I used BVP method : dsol2 := dsolve({ODE, BC}, numeric, method = bvp[midrich], y(f), range = 0 .. .5) But I got " Error, (in dsolve/numeric/bvp) division by zero" Can someone please tell me what I can do. Thanks, http://maplenet.maplesoft.com/maplenet/worksheet/mapleprimes/4384_BVP.mw

## Hoe to solve a boundary value problem...

I need to solve following ODE: ODE:= y(f)*(diff(y(f), f, f))+50.0*f -50.0*f^2= 0 Subject to boundary conditions: BC:= (D(y))(.5) = 0, y(0) = 0 I used BVP method : dsol2 := dsolve({ODE, BC}, numeric, method = bvp[midrich], y(f), range = 0 .. .5) But I got " Error, (in dsolve/numeric/bvp) division by zero" Can someone please tell me what I can do. Thanks, http://maplenet.maplesoft.com/maplenet/worksheet/mapleprimes/4384_BVP.mw

## Eigenvectors for Sparse 50x50 Matrix....

I'm trying to find Eigen vectors and values for 50x50 matrices (and larger) that are very sparse (at least 80-85% zeros). Using the Eigenvectors function [ (v, e) := Eigenvectors(L) ] function is prohibitively slow, but it seems there must be some way to speed things up by taking advantage of the sparse quality of the matrices. Thoughts?

## procedures...

hi, I've got a question: does anybody know how to receive more than one object as an output of procedure? ex. I need to get a plot and print some parameter values or to get more than one plot, but one under another, not using display command. thx.

## how do I install Maple 11? Do I need to uninstall...

I'm relatively new to Maple so the answer to this question may be simple. Why do I not get the expected results of 23.30 and 24.40 when displaying the Matrix? The results are the same if I declare it as an Array. ``` myMatrix := Matrix(1 .. 1, 1 .. 2, datatype = float[8]); myMatrix[1, 1] := 23.30; myMatrix[1, 2] := 23.40; print(myMatrix);```                                               [ 23.3000000000000007     23.3999999999999986 ]