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Jakob Sievers


Department of Environmental Science, University of Aarhus

63 total contributions since 2011

Professional Interests: glaciology, atmospheric chemistry, geophysics

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Question


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?* ...

1 month ago | 0 Answers | 0

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Submitted


VoronoiLimit(varargin)
Constrain the vertices of a Voronoi decomposition to the domain of the input data.

1 month ago | 23 downloads |

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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...

1 year ago | 1 Answers | 0

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answer

Question


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...

1 year ago | 1 Answers | 0

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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...

1 year ago | 2 Answers | 0

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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 ...

1 year ago | 1 Answers | 1

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Question


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...

1 year ago | 0 Answers | 0

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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...

1 year ago | 1 Answers | 0

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Question


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...

1 year ago | 0 Answers | 0

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Answered
How 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!

1 year ago | 0

Answered
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...

1 year ago | 0

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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: ...

1 year ago | 3 Answers | 0

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question concerning rounding of numbers
Thanks for all of your comments. They helped me greatly!

1 year 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...

1 year ago | 3 Answers | 0

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answers

Question


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: ...

2 years ago | 1 Answers | 0

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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...

2 years ago | 1 Answers | 0

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Answered
Predefining colors for in-text coloring
Repeated googling led me to this solution {\color[rgb]{1 .5 .2}text} /J

2 years ago | 0

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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),'.') ...

2 years ago | 2 Answers | 0

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

2 years ago | 0 Answers | 0

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Answered
puzzling 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...

2 years ago | 0

| 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...

2 years ago | 1 Answers | 0

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answer

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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...

2 years ago | 0 Answers | 0

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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...

2 years ago | 1 Answers | 0

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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 ...

2 years ago | 1 Answers | 0

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Question


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...

2 years ago | 1 Answers | 1

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answer

Submitted


recursive_scriptsearch
Search for strings within multiple scripts

3 years ago | 0 downloads |

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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...

3 years ago | 1 Answers | 0

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Answered
Slow 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...

3 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...

3 years ago | 3 Answers | 0

3

answers

Question


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...

3 years ago | 1 Answers | 0

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answer

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