# Jonas

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**Programming Languages:**

C++, Java, MATLAB

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English, French, German

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**Feeds**

How to plot this in MATLAB?

this could work theta = linspace (-pi/4,pi/4); x = 0.5*cos(theta).*sqrt(2.*cos(2.*theta)); y = 0.5*sin(theta).*sqrt(2.*cos(2....

13 days ago | 1

| accepted

How do I count the number of times my graph crosses two separate lines?

maybe too caomplicated, but this can work: data=[1:10 9:-1:1 2:10 9:-1:1 2:10]; % row vector to not get problems with num2str...

15 days ago | 0

Running excel VBA script via Matlab yields different chart position

this seemed to be an issue maybe related to the graphics card(s) or the excel application itself. The workaround for me was to s...

29 days ago | 0

| accepted

How to calculate the angle between two 3D vectors?

look here: https://de.mathworks.com/matlabcentral/answers/328240-calculate-the-3d-angle-between-two-vectors P1=[78,47,88]-[128...

1 month ago | 0

Reference to non-existent field 'folder'.

if there are no .nc files in the current directory, then files = dir('*.nc'); will be empty, and as consequence files(k) wi...

1 month ago | 0

How to have smithPlot with outer area with white colour?

weird function. i never used it before. but setting the Figure color before plotting with the smithplot seems to use the backgro...

2 months ago | 2

| accepted

How to get a set aspect ratio of 4:3 on a figure?

you could use pbaspect on each subplot figure; ax1=subplot(2,1,1); plot(rand(10,1)); ax2=subplot(2,1,2); plot(rand(100,1));...

2 months ago | 0

How to normalize a signal for each half cycle?

you could normalize by using a moving max window with size a bit bigger than half of one cycle: f=10; fs=100; t=0:1/fs:2;...

2 months ago | 0

How do I make it so my Plot keeps the same colours

for me this looks like an error that has nothing to do with the disableDefaultInteraction using % plot(app.LiveAxes, app.T...

2 months ago | 1

| accepted

Minimale en maximale data uit de matrix filteren

what about something like that: mat=[7 8 9 10 11 12 13; 1 2 4 5 8 2 12; 3 6 10 15 1 6 8]; colsToEdit=[1 3 7]; ...

2 months ago | 0

Question

Running excel VBA script via Matlab yields different chart position

dear community, I am trying to run a VBA script in excel using Matlab. Running in Excel, the created chart is positioned 2 colu...

2 months ago | 1 answer | 0

### 1

answerProblems in recognising text with OCR from clear logical array

i guess it is just a mishandling of the automatic mode recognition: I=imread('testOCR.png'); I=rgb2gray(I); imshow(I); c=ocr...

3 months ago | 0

| accepted

paralelise nested for loop with skipped indexes

Yes, there is a more efficient way to do this by utilizing a combination of vectorized operations and sparse matrix creation tec...

3 months ago | 0

Question

Do I have to correct correlation values for two series originating from overlapped analysis?

Dear community, I want to have a look into the correlation of two parameters. Since those parameters originate from an overlapp...

3 months ago | 2 answers | 0

### 2

answersHow to access App version number from inside the App

hi Steven, do you have powershell available (are you on windows)? then have a try with the attached m file and the prj file fo...

5 months ago | 0

| accepted

Question

how to use ranova with repeated repeated measurements

dear community, I have an experiment where 12 subjects were measured during 2 tasks and during each task, a certain value was m...

10 months ago | 0 answers | 0

### 0

answersQuestion

uicontrol does not allow 'remove' as String during component creation

Dear community, are there reserved keywords for the text-style uicontrol? I could not find a list for that but I noticed that I...

10 months ago | 1 answer | 0

### 1

answerPeriod Length of the random numbers generated by rand() and randn()

don't confuse yourself, random number do not have a period length, but what you actually mean may be the rate e.g. after which a...

12 months ago | 1

Question

Plot position in uiaxes not precise?

Dear community, - Edit below - I tried to plot a cross on an image placed into a uiaxes in a uifigure and i noticed, that the ...

12 months ago | 0 answers | 0

### 0

answershow to: multiple choises in if-function

looks good, but you could increase readability e.g. by using the ismember function alphabet = ["A" "B" "C" "D" "E" "F" "G" "H" ...

1 year ago | 2

How to make a Subplots using set(gca,'position') command?

you could create the axes by yourself and set the positioning as you did figure('Color',[0.9 0.9 0.9]); % create figure and use...

1 year ago | 0

| accepted

Submitted

partially logarithmic plots

This function allows to plot with x or y axis divided into a logarithmic and linear part.

1 year ago | 1 download |

Submitted

Data Live Acquisition Live Multi Channel

Mainly see reference to original work. Contains app designer files, exported m files and an .exe of the app

1 year ago | 3 downloads |

automatic refresh webread data

create a timer object, use a method for repeated execution and add the callback EDIT: e.g. function doStuff() intervalInS=...

1 year ago | 0

ListBox MultiSelect simulate always with Ctrl modifier?

I tried to circumvent the ctrl modofier in such a way, that I look into the event's previous value and delete/save as necessary....

1 year ago | 0

| accepted

Question

ListBox MultiSelect simulate always with Ctrl modifier?

dear community, can someone check the ListBox MultiSelect Example from the documentation for me? It does not work for me, I can...

1 year ago | 1 answer | 0

### 1

answerI need help plotting points with * symbol at intervals equal to Ts = 1/fs = 1/7s (Here is my code)?

to plot with * symbol, add it to the plot command, e.g. plot(1:10,rand(10,1),'*') if you still need a line, add a line style: ...

1 year ago | 0

How to compress 32 bit bmp images to 8 bit bmp?

you can stretch and compress it on your own, just as you want im=imread('new.png'); im=rgb2gray(im); class(im) imshow(im); ...

1 year ago | 0

| accepted

How do I find the centre of an image?

you can use regionprops for that and let the function return the centroid. This may be the cetner you are searching for. If you...

1 year ago | 0

x(t) = -u(t-3)+2u(t+1)-2u(t-1)+u(t-3)

please check your given equation, the last and first term cancel out each other. Nevertheless, i kept both of them in the code b...

1 year ago | 0