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Jonathan Epperl


Active since 2012

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Professional Interests: Control Theory, Dynamical Systems, Thermoacoustics

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Answered
" requested the Runtime to terminate it in an unusual way"
Gave it another try, this time with Matlab 2013b and Virtu MVP Pro Core: 3.0.109.29300 (The newest version at the moment)... ...

ongeveer 10 jaar ago | 0

Question


Copying option structs by value instead of reference
Here is an example using |bodeoptions|, but this is probably a much more basic problem: % Create a struct with default valu...

meer dan 10 jaar ago | 2 answers | 2

2

answers

Answered
Multi-dimensional State-Space model in Simulink
If you have the state-space description of you 3 |x| 3 system, why don't you just enter it into the parameters of the state-spac...

bijna 11 jaar ago | 0

Answered
Subplot titiles in one command
Collect your titles in a cell array: titles = {'One','two','three'; 'Eins', 'Zwei', 'Drei'; 'Ichi', 'ni', 'san'} or what...

meer dan 11 jaar ago | 2

| accepted

Answered
How to add figure title and axes labels for multiple plots?
Whatever you want to have on every axis, just move it inside the |for| loop, like so % if true % what is the point of this...

meer dan 11 jaar ago | 2

| accepted

Answered
ODE for system of non linear, second order differential equations
I'm not entirely sure I understand your notation, but assuming by |dx5| you mean the first derivative of |x5|, and by |ddx5| you...

meer dan 11 jaar ago | 0

| accepted

Answered
Problem with the product of complex numbers
Probably |simplify(Zeq)| will do that.

meer dan 11 jaar ago | 0

| accepted

Answered
How to establish all possible combinations of 4 variables out of 6 ?
Sounds like you are looking for |nchoosek|: <http://www.mathworks.com/help/matlab/ref/nchoosek.html>

meer dan 11 jaar ago | 0

| accepted

Answered
changing the axis of a plot in a way that the data series starts at x=0 at a point at one point on the y-axis and ends on the right end of the plot
This is still not a working example, the variable |VIXdate| is obviously unknown to us... So the dirty way again: ytix =...

meer dan 11 jaar ago | 0

| accepted

Answered
How to look at the source code for MATLAB's built-in sort function?
If the source code is available, then edit sort will do the job. I can't check right now, but you go ahead and try tha...

meer dan 11 jaar ago | 6

| accepted

Answered
changing the axis of a plot in a way that the data series starts at x=0 at a point at one point on the y-axis and ends on the right end of the plot
axis tight

meer dan 11 jaar ago | 0

Answered
Evaluate a function in a grid
Does that code run for you? I'm sure it doesn't, you should have mentioned that, along with the error messages... Anyway, the...

meer dan 11 jaar ago | 0

Answered
how to zoom in on specific overlapped data points and keepin the others ones inside the grid range
Okay, either you're not explaining well, or the solution is very simple: If the data doesn't have the same dimension, then make ...

meer dan 11 jaar ago | 0

Answered
How to plot node numbers using matrix of nodes's coordinates?
And |text()| doesn't give you the results you'd like? E.g. k = 1:30; [B,XY] = bucky; gplot(B(k,k),XY(k,:),'-o') axis squ...

meer dan 11 jaar ago | 1

| accepted

Answered
removing blackness in ribbon plot
The black regions you are seeing are the gridlines along the 678 rows of your matrix. My suggestions: Save the handles to the...

meer dan 11 jaar ago | 1

| accepted

Answered
Exporting matrix into an Excel file
From the documentation on |xlswrite|: _A — Data to write matrix | cell array_ _Data to write, specified as a two-dimension...

meer dan 11 jaar ago | 0

Answered
Plot 2 arrays in matlab?
You need to sort you |a| array, then permute |b| the same way. Concretely: help sort % Then you'll understand why: [a...

meer dan 11 jaar ago | 1

| accepted

Answered
Grouping Plot and Fill in Same legend object
Okay, I hope, this helps you: % -- generate some dummy data t = linspace(0,1); s1 = sin(5*t); s2 = 3-cos(5*t); s3 = s1....

meer dan 11 jaar ago | 2

| accepted

Answered
What is a function that takes the diagonal of a matrix (N) and converts the diagonal to all zeros.
Assuming |m| is square (because else you'd have to define the diagonal for me): diagzero = @(m) m - diag(diag(m));

meer dan 11 jaar ago | 0

Answered
Text in 3D plot
How about adding a few whitespaces to your string, like so: text(x1(i,1),y1(i,1),z1(i,1),[' ' ... num2str(time(i,1))],'H...

meer dan 11 jaar ago | 0

| accepted

Answered
How to plot this 3d graph?
Plot the whole graph with |mesh| or |surf|, then |hold on|, then use |plot3| to plot the lines you'd like to emphasize: x ...

meer dan 11 jaar ago | 0

| accepted

Answered
Anonymous functions not acting as they should?
I think the mistake happens here: fmacexp=@(x,n) macexp(n)+((x^n)/factorial(n)); The value of |macexp| is now "hardwired...

meer dan 11 jaar ago | 1

| accepted

Answered
best way to include mesh plot in latex
Here's what I do: I export the figure with |export_fig| ( <http://www.mathworks.com/matlabcentral/fileexchange/23629-exportfig>...

meer dan 11 jaar ago | 0

| accepted

Answered
Output a square wave with tuneable frequency and phase delay
Showing us some of your prior attempts would certainly help, since we then could avoid suggesting stuff you already tried. An...

meer dan 11 jaar ago | 0

Answered
Making a magic square matrix singular
The row-sum, column-sum and diag-sum of a magic square are all the same, and the magic square uses all the integeres |1:n^2|. Th...

meer dan 11 jaar ago | 2

Answered
Why doesn't "solve" work on my MLab(student)
Because your version of Matlab does not include the Symbolic Math Toolbox. ver and you'll be shown all installed toolbo...

meer dan 11 jaar ago | 0

| accepted

Answered
Taking a derivative of a function and plotting it over a specified length
Are you assigning the variable |x| before you call |syms x|? Probably, and that's probably the problem. If you really want fu...

bijna 12 jaar ago | 0

Answered
Add world map background to contour plot
I hope you're still interested in an answer to this question, here's what I can offer: lon = 30:2.5:150; lat = 55:-2.5:-5;...

bijna 12 jaar ago | 1

| accepted

Answered
how to remove from all fields in the same position of a struct?
What you did should work, my only idea about a possible error: are your |samples| "fat" or "tall"? If they are fat, i.e. |n| col...

bijna 12 jaar ago | 0

Answered
*why* easter egg in MATLAB
S = evalc('why')

bijna 12 jaar ago | 1

| accepted

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