Rik

Last seen: Today

2.590 total contributions since 2017

E-mails with feedback/questions about FEX submissions are welcomed. In general I will post e-mails about Answers on the related page, unless there is good cause not to do so.

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Answered
Insert text to the image in for loop
Instead of recreating graphics object every iteration of your loop, it is often faster to create the object once and then update...

1 día ago | 0

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Answered
Naming variables from one column Import file
Don't store data in a variable name. You should use cell arrays or fields of a struct instead.

3 días ago | 1

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how can i convert an answer from an inputdlg into a matrix ?
While you could solve it like you suggest, a much better idea (in my opinion) would be to use uigetfile. file = uigetfile opens...

4 días ago | 0

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Graphing data from a .txt file giving error and inaccurate data
You should probably read the file once and then parse the data. I cropped your file, because I don't think the entire thing is r...

4 días ago | 1

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F=Kff*uf - Matrix operation
You were almost there: F = [383.02; 321.39; 0;]; Kff = [634.8 -191.2 -353.6; -191.2 447.3 353.6; -353.6 35...

4 días ago | 0

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Answered
Merge binary images and smooth the edges
I'm not getting as smooth as your example, but this should do as a first approximate. IM=imread('https://www.mathworks.com/matl...

5 días ago | 0

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Turn off "Improve MATLAB by sending user experience" from the command line
Using a function to unwind the settings (casting them to struct), and using comp_struct from the FEX, I found the relevant setti...

5 días ago | 1

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x,y coordinates of text
You can use the Extent property of the text object to find the corners of your text area. The only thing left to do for you is t...

5 días ago | 1

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Answered
blood vessel segmentation in retinal images
You ran the function without any inputs. You will have to call it with an input, e.g. like this: IM=imread(fullfile('Test Image...

6 días ago | 0

Answered
how can i find and mark indexes on my data?
The answer is already in your question: you should use the find function on your mci array. For clarity, here are the content...

6 días ago | 0

Answered
How can I set the table parameter in .txt output
Because you didn't tell Matlab to use 2 spaces in the FormatSpec. Compare the two versions below (the second line is to provide ...

6 días ago | 0

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Answered
Saving .wav file
You're overwriting the song every time this callback is triggered. You should probably store each note to a field of your guidat...

6 días ago | 0

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Answered
Explanation of "Position" in uitable
Since the units are set to Normalized, the units of the Position property are a percentage of the parent object (generally a fig...

6 días ago | 0

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find previous value in column before specific set value and delete all others
You can use find to create a vector of indices. data=[182 0 195 13 197 2 207 10 210 3 219 9 222 ...

12 días ago | 0

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Answered
insert variable k value into new variable names
Yes: k=1; on{k}=imread(sprintf('on_%d.tif',k)); on{k}=double(on{k}); figure; imshow(on{k}); The main point is to use a cell...

12 días ago | 0

Answered
How to get specific columns from a csv file and get its average and standard deviation?
Often the answer to 'how to do this' is: break your problem into solvable steps. You need to read your data from a file to a Ma...

16 días ago | 0

Answered
I would like to compile a text string for each one of the three index of two given arrays
Easy with sprintf: XX=[1,2,3]; YY=[3,2,1]; z=repmat("",size(XX)); FormatSpec='&DEVC ID=''vel_%d'', QUANTITY=''VELOCITY'', AB...

17 días ago | 1

Submitted

getUTC
get the current time in UTC

18 días ago | 2 downloads |

Answered
Fill in a matrix after an evaluation
I guess boldly: x0_r=rand;y0_r=rand;z0_r=rand; target=rand(6,76+3); accuracy_right = zeros(76,6); for i = 1:1:76 data...

20 días ago | 0

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Answered
How can i convert this string into an input for a function?
ch=['MRWI' 'IDMZ' 'CGBI' 'JKNO']; v=ch.';v=v(:).'; disp(v)

21 días ago | 0

Answered
error in function that in my version work correctly but in another version work incorrect
You didn't send them a function, but a script. Since R2016b you're allowed to put functions in a script file. The solution is t...

22 días ago | 0

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Answered
Finding 4 closest points
You can design something yourself, but you could also see if fillmissing solves your problem. The documentation suggests it shou...

23 días ago | 0

Answered
Setting Access Properties to Public without AppDesigner
As you can see <https://www.mathworks.com/matlabcentral/answers/483657-how-to-create-a-gui#answer_412887 here>, class properties...

23 días ago | 0

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Answered
How to calculate the center of white part?
The best way is to use something like regionprops, but since you only have a single patch, you can use find to get a list of coo...

25 días ago | 1

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Answered
how to plot a function
The same as any other function: find a vector of x data and calculate the y data. Then you can use plot. You can use plot3 for x...

26 días ago | 0

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Nominate yourself to become a member of MathWorks Community Advisory Board
You can find the current members of the MATLAB Central Community Advisory Board on this page. At the bottom of that page, you c...

26 días ago | 0

Answered
Use API in matlab
You're in luck: NASA decided to provide the data in JSON, and Matlab can parse that JSON output for you: url='https://power.lar...

26 días ago | 0

Answered
Deployed exe with configuration file
It sounds like you need something very similar to my GetWritableFolder function. You can use the second output to confirm the f...

26 días ago | 0

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Answered
simple calculator using GUI
For general advice and examples for how to create a GUI (and avoid using GUIDE), have look at this thread. Every callback is a ...

26 días ago | 0

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Answered
How I can optimize my code for a stack construct?
Dynamically growing a variable is generally slow, because Matlab needs to copy the entire array. You could pre-allocate a stack...

26 días ago | 0