# Jakob Sievers

Professional Interests: glaciology, atmospheric chemistry, geophysics

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**Content Feed**

Can I create a questdlg box with multiple yes/no options in the same box?

This is an old question but I was wondering if anyone know of any solution to this question? If not I'll sit down and code it my...

3 years ago | 0

Question

How to download file from dropbox using e.g. websave?

Hi there How does one download a shared file (public visibility) from dropbox? I used to use the following code to achieve th...

4 years ago | 1 answer | 0

### 1

answerQuestion

How to calculate the covariance of two vectors using wcoherence?

Hi there *How does one calculate the covariance of two vectors from the cross-spectrum outputs of the wcoherence function?* ...

5 years ago | 0 answers | 0

### 0

answersQuestion

Determining toolbox dependency of a series of scripts

Hi there I am trying to determine the toolbox dependency of a handful of scripts, all run using the "MainScript.m". I am usin...

6 years ago | 1 answer | 0

### 1

answerQuestion

Why is legend not saved with hgsave/savefig?

Hi there So I am using hgsave or savefig to save my current figure to a .fig which I then open later on with openfig but when...

6 years ago | 1 answer | 0

### 1

answerQuestion

Computational Fluid Dynamics (CFD) and Matlab?

I'm wondering: If I wanted to illustrate the 2D/3D air-flow and turbulence around simple solid objects which I define myself, wo...

7 years ago | 3 answers | 4

### 3

answersQuestion

recommendations for books on global optimization algorithms

Hi all Can anyone recommend any good books on global optimization algorithms? I'd like to get a bit more "under the skin" of ...

7 years ago | 1 answer | 1

### 1

answerQuestion

Recommended books on machine learning?

Hi all I want to get into the field of machine learning, however there are quite a lot of books out there on the subject. Doe...

7 years ago | 1 answer | 0

### 1

answerQuestion

Is it possible to move subplot content?

Hi there Say I have a subplot structure of size 3x2 where all 6 subplot handles are stored in a 3x2 matrix. Is it possible to...

7 years ago | 1 answer | 0

### 1

answerQuestion

Puzzling warning when changing a linear loop to a parfor loop. Need help.

I am trying to change a linear loop of image exporting to a parallel loop. In linear mode the export_fig (the function I am usin...

7 years ago | 0 answers | 0

### 0

answersHow to derive the 2D field and convergence based on xy gradients

I just realized that the function div=divergence(U,V) will do just that. Thanks for your response!

7 years ago | 0

How to derive the 2D field and convergence based on xy gradients

Hi Torsten Thanks for the swift response! Reg. the second question: I would like to locate mathematically points of con...

7 years ago | 0

Question

How to derive the 2D field and convergence based on xy gradients

Hi all This might be an easy question but I am a bit stuck on it. The function gradient yields xy gradients of a 2D field: ...

7 years ago | 3 answers | 0

### 3

answersquestion concerning rounding of numbers

Thanks for all of your comments. They helped me greatly!

7 years ago | 0

Question

question concerning rounding of numbers

Hi I am having trouble rounding a number to a fixed number of digits. Can anyone explain the problem I am encountering? (As s...

7 years ago | 3 answers | 0

### 3

answersQuestion

How do I clear the command window in a parfor loop?

It seems that clearing the command window (clc) is not possible in parfor. How do I achieve this then? I.e. i'd like this loop: ...

7 years ago | 1 answer | 0

### 1

answerQuestion

How to set Xcolor=none for an x-axis

Hi all I am creating a new "axes" within an existing plot. I would like to remove the x-axis line of this new "axes" complete...

8 years ago | 1 answer | 0

### 1

answerPredefining colors for in-text coloring

Repeated googling led me to this solution {\color[rgb]{1 .5 .2}text} /J

8 years ago | 0

| accepted

Question

Predefining colors for in-text coloring

Hi all I am using the latex approach to coloring segments of e.g. a title. For example: figure plot(rand(10,1),'.') ...

8 years ago | 2 answers | 1

### 2

answersQuestion

Best global optimization technique

The performance of an optimization algorithm varies greatly depending on the problem at hand. Often performance may vary with st...

8 years ago | 0 answers | 0

### 0

answerspuzzling parfor error during large calculation

I think I may have solved the issue. I dug deep into the optimization code and discovered that it saves a temporary file, and de...

8 years ago | 1

| accepted

Question

puzzling parfor error during large calculation

Hi there I am running a large number of differential evolution optimization runs on a 4-parameter problem, for different inpu...

8 years ago | 1 answer | 0

### 1

answerQuestion

Exporting handles in vectors alongside a figure

Hi there I am exporting a number of figures (.fig) using saveas in one script and opening them for further analysis in anothe...

8 years ago | 0 answers | 0

### 0

answersQuestion

How to suppress text output from a globalsearch run

Suppressing output from, say, patternsearch, is simple enough: options=optimset('Display','off') However, I can't seem t...

8 years ago | 1 answer | 0

### 1

answerQuestion

Nonlinear optimization problem: The final point is the initial point.

Hi there I am trying to perform a non-linear optimization of a model (non-linear line with 3 input parameters) to a positive ...

8 years ago | 1 answer | 0

### 1

answerQuestion

nonlinear optimization with dynamic constraints

Hi all Is it possible to assign a dynamic set of constraints when using an optimization routine such as fmincon? Specifically...

8 years ago | 1 answer | 2

### 1

answerQuestion

Name of convergence method

Hi all This is strictly speaking not a Matlab question, but it does refer to a method I am applying in Matlab and I am unsure...

8 years ago | 1 answer | 0

### 1

answerSlow debugging for long scripts

Hi again Neither of the proposed solutions seem to resolve the situation. It has to be a software situation because even afte...

8 years ago | 0

Question

Slow debugging for long scripts

Hi all I know that ideally I should try to break up long scripts into smaller components, and I plan on doing that, but for n...

8 years ago | 3 answers | 0

### 3

answersQuestion

Servo control, using Matlab

Hi guys I would like to get into the world of controlling servos to perform operations in real-life. Matlab being my preferre...

9 years ago | 2 answers | 0