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# Franziska

26 total contributions since 2009

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Question

How to load all variables from *.mat except one?
Hi all, I want to load all variables from a *.mat-file except one. Here are my lines: X = 10; if restart == 1...

3 years ago | 1 Answers | 0

### 1

How to stop an ode-solver if integration takes too long?
Thanks Mahdi for your fast answer. I think we misunderstood. My problem is the following: I want to solve a system of equati...

3 years ago | 0

Question

How to stop an ode-solver if integration takes too long?
Hi all, I am working with implicit ode15i solver. I receive results within seconds for more than 80 parameters to solve. ...

3 years ago | 2 Answers | 0

### 2

How to solve a system of nonlinear 2nd order differential equations?
My code is very sensitive to the choice of initial velocity values. I have some questions here: 1) Is there any possibility t...

4 years ago | 0

Question

How to solve a system of nonlinear 2nd order differential equations?
Hi there, I have a challenge solving a system of differential equations 2nd order. I do not receive an error message but hav...

4 years ago | 2 Answers | 0

### 2

use fsolve with boundaries
Thanks. - LSQNONLIN works perfect.

4 years ago | 0

Question

use fsolve with boundaries
Hi, I wonder if there is a way to use fsolve with boundaries? I am currently using fsolve for a system of nonlinear equati...

4 years ago | 3 Answers | 0

### 3

how to transfer expression to myfun using fsolve?
Ok, here is a way to do it. Define the expressions as global variables. This is not a good way, but it works for now. I am sti...

4 years ago | 0

how to transfer expression to myfun using fsolve?
Thanks for the fast response! I tried solving it with symbolic variables. It is fine for 3 equations, takes more than 2 hours...

4 years ago | 0

Question

how to transfer expression to myfun using fsolve?
Hi, I am trying to solve a system of nonlinear equations. I have the command in a for loop and each time the number of equation...

4 years ago | 3 Answers | 0

### 3

Question

save figure in backround job
Hi, I am running a matlab job on an external computer. Figure display is not possible. However, I would like to save figures ...

4 years ago | 1 Answers | 0

### 1

Question

plot with 2 x-axes (logscale)
Hi all, I am currently trying to plot with two x-axes. I tried the plotxx.m from File Exchange (thanks for sharing), but still d...

5 years ago | 0 Answers | 0

### 0

Responded

Re: coupled differential equations -> ode15s
I converted the problem to Mx=f . So it looks like: M= [1 0 0 0; x= [u; v; up; vp]; f= [xp; yp; Q; +A/...

6 years ago | 2201 views

Posted

coupled differential equations -> ode15s
Hi, I have a problem which is a hard nut to crack. Basically I have to coupled differential equations and I want to determine ...

6 years ago | 2201 views

Responded

Re: differential equation -> system of first order ode
Thanks Torsten!!! It works!

7 years ago | 3767 views

Responded

Re: differential equation -> system of first order ode
Thanks Torsten for your answer. Acutally I have two equations (see below). But I thought I have to substitute equ (II) in (I) a...

7 years ago | 3767 views

Responded

Re: differential equation -> system of first order ode
Thanks Torsten for your answer. Acutally I have two equations (see below). But I thought I have to substitute equ (II) in (I) a...

7 years ago | 3767 views

Responded

Re: differential equation -> system of first order ode
Sorry, the equation is even more complicated: A-Bx(t)x'(t)-Cx'(t)^2-Dx(t)x''(t)=E-Fy(t)y'(t)-Gy'(t)^2-Hy(t)y''(t) I can write it...

7 years ago | 3767 views

Posted

differential equation -> system of first order ode
Hi all I have a differential equation similar to the following: A-Bx(t)-Cx'(t)^2-Dx''(t)=E-Fy(t)-Gy'(t)^2-Hy''(t) I want to us...

7 years ago | 3767 views

Responded

Re: coupled system of odes
Oh, thanks a lot. That happend on account of an oversight. Thanks a lot!!!

7 years ago | 3379 views

Responded

Re: coupled system of odes
OK. Now I changed several things. And I found an example http://www.mathworks.com/support/tech-notes/1500/1510.html#syseqnt How...

7 years ago | 3379 views

Posted

coupled system of odes
Hi all, although there were already a lot of questions and answers on this topic, it is not clear for me when trying to solve m...

7 years ago | 3379 views

Responded

Hi John, thanks a lot. It works. Thanks a lot for not only telling me how to do, but also for explanation why it should be done...

7 years ago | 1239 views

Posted

Hi all, I have a quite simple question... I have an axially symmetrical body whichs outer contur can be described by the functi...

7 years ago | 1239 views

Posted

image processing - pixel - size of image
HI, My aim is to create two movies which run the same time (for comparison). One includes images which were created with a camer...

7 years ago | 1536 views

Posted

image processing
Hi, My aim is to create two movies which run the same time (for comparison). One includes images which were created with a came...

7 years ago | 754 views