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21did21


Active since 2011

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voronoi structure in 3 dimensions
Hi world, i try to draw a 3D voronoi diagramm in a cube, as in: http://www.google.fr/imgres?um=1&rlz=1C1CHMO_frFR516FR516&hl...

11 years ago | 0 answers | 0

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answers

Question


ifft after one fft
Hi all, i am trying to perform an "ifft" after a "fft" but i have a problem when the number of points for my "fft" has not th...

11 years ago | 1 answer | 0

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answer

Answered
simple traduction from ode45 to ode15i
can i have your help please ? thanks

12 years ago | 0

Question


simple traduction from ode45 to ode15i
Hello all, could you explain to me how to solve a differential system with matlab please? *with ode45 I know:* _main.m_...

12 years ago | 1 answer | 0

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answer

Answered
i want to filter a frequeny... ?
thanks a lot !

12 years ago | 0

Answered
i want to filter a frequeny... ?
thanks you for your answer !! but, i am a beginner. can you explain this ? 1°) why we must have "fs = 10" ? because we hav...

12 years ago | 0

| accepted

Question


i want to filter a frequeny... ?
Hi all, I write because I'm trying to do filtering in maltab. in the code below I have a signal which is composed of two s...

12 years ago | 3 answers | 0

3

answers

Question


sorting of my figures
Hello world ! i come back with a previous problem, but now my question is more clear :) i have a problem with the management...

12 years ago | 0 answers | 0

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answers

Answered
hard figure sorting / management
Ok, my can code can be read now ;) => thanks Oleg for your link :)

12 years ago | 0

Question


hard figure sorting / management
Hello world ! i have a problem with the management of my figures. It's difficult for me to find why my programm don't works w...

12 years ago | 3 answers | 0

3

answers

Answered
hard figure sorting / management
hello, i know that my code is hard to read :( the problem is that "code" don't works with me :( => perhaps can you copy and pa...

12 years ago | 0

Answered
ode45 : order, number of prediction and step time (theory)
thanks !

12 years ago | 0

Question


ode45 : order, number of prediction and step time (theory)
Hi world ! i want to understand the notation in matlab and the ode algorithms. ODE45 means a classical method of Runge Kut...

12 years ago | 2 answers | 0

2

answers

Question


generate a distribution
hello world ! context: I have about 1e22 samples that have an average size of third-9. I could content myself with this in...

13 years ago | 0 answers | 0

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answers

Question


using logninv to have a distribution
hello world, I watched the "Logninv" but I did not understand how to use it ... this is what I try to do: I'd like to h...

13 years ago | 0 answers | 0

0

answers

Answered
how can i generate a inverse log normal distribution ?
thanks for your help!

13 years ago | 0

Question


how can i generate a inverse log normal distribution ?
hello world, i a beginner with matlab and i want to generate a distribution which follows a inverse log normale distribution....

13 years ago | 2 answers | 0

2

answers

Answered
problem with time step in ODE ?!
up :)

13 years ago | 0

Answered
problem with time step in ODE ?!
it's ok now i think, i have cleaned my code. what do you think about it ?

13 years ago | 0

Answered
problem with time step in ODE ?!
perhaps i can add some options but i don't know how i can do this because in the help we don't have example for ODE...

13 years ago | 0

Answered
problem with time step in ODE ?!
thanks a lot, for your answer ! => Walter: i have tried ODE23s but it don't change something :( => Matt: i have change thi...

13 years ago | 0

Question


problem with time step in ODE ?!
Hi all, I have an ODE to be solved but I have a concern with the use of this function, the following error message: Warning:...

13 years ago | 7 answers | 0

7

answers

Answered
always this message : The first-order optimality measure, 0.0, is less than options
1°) thank walter i will see this 2°) i have one general question : how i can increase the discretisation for the gradient ...

13 years ago | 0

Answered
always this message : The first-order optimality measure, 0.0, is less than options
thank for your help ! Jan : i have already put the matlab code with code formatting...? Walter : Rm_exp and Fv_exp are global ...

13 years ago | 0

Answered
always this message : The first-order optimality measure, 0.0, is less than options
Gamma=0.21; A=5100; B=-0.07; parametresInitiaux=[Gamma A B]; lb=[0.13 3500 -1.5]; ub=[2.6 8000 5]; options = optim...

13 years ago | 0

Question


always this message : The first-order optimality measure, 0.0, is less than options
hello all, Recently I came to the forum to ask for help about the functions of the tool box "optimization". I used "lsqnonlin...

13 years ago | 3 answers | 0

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answers

Question


lsqnonlin doesn't work in my case
dear all, i have a function "calculs" which have in input a vector of parameters [a,b,c] and in output a residu vector like [1...

13 years ago | 0 answers | 0

0

answers

Answered
TolFun don't work for lsqnonlin?
i sorry, my english is not very nice. So, i don't understand very well your answer... i have try to put: options = optimset(...

13 years ago | 0

Question


TolFun don't work for lsqnonlin?
Hello world! i use lsqnonlin but TolFun don't work ! i do this: *options = optimset('Display','iter','TolFun',1e-8) [x,resnor...

13 years ago | 2 answers | 0

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answers