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Stijn Haenen

41 total contributions since 2019

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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...

4 jours ago | 1

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

4 jours ago | 0

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(...

4 jours ago | 0

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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 ...

7 jours ago | 0

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-...

7 jours ago | 0

how to randomize a vector as fast as possible
this is finished in 28 sec, i dont know how fast other methods are. tic Vec=1:125000; numelVec=numel(Vec); new_Vec=zeros(1,n...

7 jours ago | 0

How to use loops to plot add graphs to a plot depending on checkbox selection
I think you can use this script as an example: close all fig = figure; checkbox_USD = uicontrol(fig,'Style','Checkbox','Strin...

7 jours ago | 0

How to plot? Having a issue.. Need to plot evolution of the norm of a symbolic matrix for t=0 to 1.
Your PHI is a 4x4 matrix, do you want to plot 16 function against t? That can be done with: syms t PHI=[ 1, t, t/3 - (2*exp(...

8 jours ago | 0

How to use loops to plot add graphs to a plot depending on checkbox selection
You can get the value of the checkbox number i with v=fig.Children(i).Value So maybe you can make a for loop like this: figu...

8 jours ago | 0

How to plot? Having a issue.. Need to plot evolution of the norm of a symbolic matrix for t=0 to 1.
you should use fplot or ezplot (https://nl.mathworks.com/help/symbolic/ezplot.html) to plot a 'sym' variable.

8 jours ago | 0

How to plot Gantt Chart for job shop scheduling?
Do you mean something like this: Number_of_tasks=20; width=200/Number_of_tasks; startDates=1:20; endDates=3:22; for i=1:Num...

12 jours ago | 0

Plotting Terminal velocity Vs particle diameter
With this script you overwrite vt and dp every loop, so at the end you only have 1 single value for vt and dp and you cannot plo...

12 jours ago | 0

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Loop is not running in Matlab
There are some errors in your script: i=0.0015:-0.0015:0.00001; Only gives the number 0.0015 as output, if you want that i goe...

17 jours ago | 0

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Random shuffle vector such that all elements fall in new index positions
Try this: v=[1:100]; %your vector List=1:numel(v); for i=1:numel(v) newList=List; newList(i)=[]; newpos=datasa...

17 jours ago | 0

Detecting Entire Column has the same integer value
Try this: if a(:,1)==a(1,1)&mod(a(1,1),1)==0 Ans=[1 0]; else Ans=[0 0]; end

19 jours ago | 0

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Polyfit is giving incorrect coefficients for correct plot fit.
If I run this script i get a good fit, see image N=10:10:60; t1 = [3.5 6.5 10 12.5 15.5 19]; t2 = [3 6.5 10 13 16 20]; t3 = ...

19 jours ago | 0

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nccreate overwrite existing file
Have you tried this: if exist(filename) delete filename end nccreate.....

19 jours ago | 0

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How Can i write a function that takes a structure array and returns this array with bubble sorting
Maybe this will work: ages=[structurearray.age]; [a,b]=sort(ages); newstructurearray=structurearray(b); The used structure i...

19 jours ago | 0

year function does not read properly
year(input) tells you in which year the day of the input is, where the input is the day number, starting from first of january 1...

22 jours ago | 0

Extracting a value from a 3D table
Sure, In the first line "Num_nan=find(isnan(Table));" you get the positions of the NaN, but this is just a number. For example,...

22 jours ago | 0

How to solve differential movement equation?
I dont think you can solve this, a relation between x and y, or x and t, or a direction of the force is required.

22 jours ago | 0

Extracting a value from a 3D table
Maybe this works, for output(a,b,c): Num_nan=find(isnan(Table)); c=floor(Num_nan/(81*81))+1; b=floor(rem(Num_nan,81*81)/81)+1...

22 jours ago | 0

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How to reuse the same format
Maybe this will work: a='%7.0f'; fprintf(strcat('defaults->',repmat(a,1,9),'\n'),header);

22 jours ago | 0

Guys, i have no idea how to proceed with these two questions, would you please help me out, many thanks guys.
2.3: syms k vpasolve(det(R-k*i3)==13,k)

22 jours ago | 0

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Optimize evaluation of triple infinite series using FOR loops
Maybe you can compute p2vec{i,j} outside the k-for loop and multiply it inside the for loop with the k-factor.

environ un mois ago | 0

Callback function not forwarding the variables.
If you have the edges of the square you can maybe use this example to get the number of points inside the square. x=1:100; y=1...

environ un mois ago | 0

How to limit the movement of a rectangle?
maybe this will work: roi = drawrectangle('Position',p ,'Color',[1 0 0]); t=0; while t<1 pause(0.15);pos=get(roi,'positi...

environ un mois ago | 0

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How to limit the movement of a rectangle?
Maybe you can use the function: get(roi,'position') But i'm not sure what you want.

environ un mois ago | 0