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Stijn Haenen


Last seen: Today
66 total contributions since 2019

Stijn Haenen's Badges

  • 3 Month Streak
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  • Knowledgeable Level 2
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Answered
save data to a new row in a table for each iteration of a for loop
something like this might be useful for you: data=[]; for i=1:0.1:10 data(:,end+1)=[i^2;i^3];%just example of data end

11 days ago | 0

Answered
It's posible to make figure always maximized and block minimized option?
You can do this with position function of a handle: h=figure(); h.Position=[1,41,1536,749] % depends on your screen size, 1 41...

11 days ago | 0

Answered
How not to delete one element of a figure when using cla?
Maybe you can delete one of the 'Children' of the figure. type: h.Children and check if there is any data that can be delete...

11 days ago | 0

Answered
Computing an specific numerical Integral
I think you should use a Riemann integral to estimate the answer of this integral. Or maybe wolfram Mathematica can solve it f...

11 days ago | 0

Answered
How to copy files form one directory to another
cd('source_folder') filenames=dir; for i=3:length(filenames) copyfile(filenames(i).name,'destination_folder') end

15 days ago | 0

Submitted


steppermotor
Easy control of a bipolar (4 cable) stepper motor, power by usb port and controlled with audio signal via the audio jack output....

15 days ago | 2 downloads |

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Answered
Changing dimensions of a cell array
You can do this with: ' field=field';

18 days ago | 0

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Answered
Why wont matlab start up on my laptop?
I have the same problem sometimes. On my computer this is caused by a wrong target location of my desktop shortcut. The shortcut...

22 days ago | 0

Answered
How do you randomly choose a grey bar in picture to turn white?
This is most likely not the best way to do it but it works: picture=zeros(50,50); picture(10,10:12)=100; picture(20,10:12)=10...

24 days ago | 1

Answered
function serialportlist is not working
I do not know if i have such a device. I want to play audio files via different USB speakers, do you have any tips how to do thi...

26 days ago | 0

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Question


function serialportlist is not working
When I use the function 'serialportlist' to identify the serial ports on my laptop i get a 1x0 empty string array. ports=serial...

27 days ago | 1 answer | 0

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answer

Answered
How can I extract values from an N x 2 matrix?
What about this?: cord=zeros(1,2); for i=1:100 xx = input('Enter x coordinates in the form [0]'); yy = input('Enter ...

1 month ago | 0

Answered
Replace -99 with NaN
x=[1 2 -99 3 4 -99 5 6 -99]; x(x==-99)=NaN;

1 month ago | 0

Answered
Custom colour bar, excluding the Blue from RGB.
Maybe you can try this: h=figure(); A = [200 200 200 200 200; 200 200 200 200 200; 200 200 100 200 200; 200 200 200 200 200; 2...

1 month ago | 0

Answered
Error: Inner Matrix Dimension Must Agree
you should use " .* " instead of " * " .

1 month ago | 1

Answered
Index exceeds matrix dimensions error
You should use ( and ) not { and }. Try this code: t=zeros(10,1); for n=1:10 if n/2>2 t(n)=t(n-1)+1 end end

1 month ago | 0

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Answered
How can I get the column number of a matrix with smallest error to my value?
Mybe you can use: [x,y,z]=find(....)

1 month ago | 0

Answered
Efficient way of selecting columns of a matrix
You can get the data from different columns also in two (maybe more?) ways: a=[1:10;11:20;21:30]; tic for i=1:10000 a(:,...

1 month ago | 0

Answered
How can I convert all string cells in a table to numerical values?
If you use the import data tool, you can chose to ouput the data in matrix instead of a table. With this tool you can also gene...

1 month ago | 1

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Answered
How can I use a loop to maximize correlation of multiple graphs?
Maybe something like this can help you: clear Y_data=[ones(1,40)*-6,-6:-2/20:-8,ones(1,140)*-8]; %just an example for x1=1:19...

1 month ago | 0

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Answered
Why does cumtrapz return negative values?
Your X and Y are from high value to low values, resulting in negative areas. use fliplr() to mirror arrays X and Y. X=[0.5056 ...

2 months ago | 1

Answered
Adding values from columns 1:i for each column for a new matrix of the same size
Something like this? matrix=[1 2 3; 1 2 3; 1 2 3; 1 2 3]; for i=1:size(matrix,2) matrix_new(:,i)=sum(matrix(:,1:i),2); e...

2 months ago | 0

Answered
input image without writing a path directory in the code
maybe you can use this: https://nl.mathworks.com/matlabcentral/fileexchange/73801-adding-all-subfolders-of-a-certain-base-folde...

2 months ago | 0

Submitted


Adding all subfolders of a certain (base)folder to the path.
This code will add every subfolden within a certain base folder to the searchpath.

2 months ago | 0 downloads |

Answered
Draw horizontal lines using for loop on set of images
Maybe this works: Color=[255,255,0]; %color in 8bit, [255 255 0] is yellow width=3; %width of the line Line_Y_coor=[500 60...

2 months ago | 1

| accepted

Answered
Mean of certain elements within a matrix
I think this will work: for i=1:371 Mean_i(i)=mean([matrix(i,5:6),matrix(i+1,2:4)]); end

2 months ago | 0

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Answered
How do I plot error bar at only one location ?
just plot first without errorbar and than with errorbar for only the 4th value: plot(u,v,'b') hold on errorbar(u(4),v(4),err(...

2 months ago | 0

| accepted

Answered
How to use loops to plot add graphs to a plot depending on checkbox selection
Which matlab version do you have? I have 2019a and it works. What do you see if you typ in the command window: fig.Children ...

2 months ago | 0

Answered
How to draw multiple rectangular diffraction pattern
Somthing like this? clc clear all lambda=632e-9; k=(2*pi)/lambda; a=1e-3; b=4e-3; d=20e-3; Io = 100.0; R = 1; Y = (-0.4e-...

2 months ago | 0

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