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Rik


Last seen: Today
1,906 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
How can I find the centroid of this circle of objects?
There are at least two options here. The first is to take the average of the x coordinates and y coordinates of the white pixels...

24 hours ago | 0

Answered
Approximate a log curve as linear to predict a value
This should help: Cv_Q = 0.7129; Cs_Q = 2.0790; meanQ = 2775; K_p = [4.76406175741670;3.92285098587282;3.01035116589301;2.53...

1 day ago | 0

Answered
for loop not working
Then you are stuck with first undoing that mistake. You should convert those coordinate variables to a single array. You can use...

1 day ago | 0

Answered
how to recived input user in matlab
You need to specify that you want the result as a char array: str=input('enter the string>>','s'); It is also a good idea to d...

1 day ago | 1

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Answered
How to skip lines to execute/run?
You should be using strcmp to compare strings or chars, but otherwise what you describe is exactly what you need to do (well, on...

2 days ago | 0

Answered
Changing decimals shown in matrix?
You can control this with the fomat function. The closest you can get is two decimals with format bank You should be aware tha...

2 days ago | 0

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Reading .csv files from .txt file.
How to read text files is maybe the most frequently asked question. Among many solutions, you can either directly read the txt f...

3 days ago | 0

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Answered
Concatenate nested cell array in one
Since apparently it was the correct solution, I'll repost it: It puzzles me why you would want this without the temporary varia...

3 days ago | 0

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Answered
Splitting arrays based on row number resulting from for loop
Here you go: data=(1:10)'+(0:1);%generate some data splits=[3 8];%use the splits you mentioned if ~isempty(splits) spl...

3 days ago | 0

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Answered
GUI Interface to guess a random number
You should put it in the function that executes when you start you GUI: OpeningFcn. Be sure to store the value in the handles s...

3 days ago | 0

Answered
Counting and removing rows with the same numbers in a particular order
Assuming this is indeed the input data you have: A = [1234;4123;3412]; B=arrayfun(@(x) sort(sprintf('%d',round(x))),A,'Unifo...

3 days ago | 0

Answered
Picking up the correct index values
You should probably rethink the way you store these values, because this is much more difficult to index than it needs to be. v...

3 days ago | 0

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Answered
error when using 'find' function
If you store output of the find function to a temporary variable, you will notice that the error occurs when that temporary vari...

3 days ago | 0

Answered
How to solve this error?
You are close, but you forgot that the code below returns an array. month==[4,6,9,11] Use parantheses to group your coditions....

3 days ago | 0

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Answered
Adding Noise To A Folder OF Images in A Loop
If you don't understand how a function works you should read the documentation. It contains several examples and shows you how t...

4 days ago | 0

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Answered
scatter plot covers the axes values
If you manually set the tick labels you can set an arbitrary distance between the axis and the label. If this doesn't work you m...

4 days ago | 0

Answered
How to automatically display a figure in fullscreen in MATLAB2016?
It doesn't look it is possible to draw over the taskbar like that in older versions. The closest you will probably get is with s...

4 days ago | 0

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Answered
Counting the number of occurences for specific values in an array
a=[ 1 2 3 4 5 5 4 3 2 1 ] ; histcounts(a) If you have non-integer data you can use the unique function to convert your vector ...

4 days ago | 0

Answered
How can I create a structure array for two files?
You can treat fields of a struct just like any other variable: ECGData=struct;%create empty struct, this isn't mandatory ECGDa...

4 days ago | 1

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Answered
How to calculate average for data every nth row?
Something like this should do the trick: data=rand(900,9); row_interval=30; avg=zeros(1,row_interval); stderr=zeros(1,row_...

4 days ago | 1

Answered
how to make a table as a figure ?
There is an example about how to do this in the documentation of the uitable function.

4 days ago | 0

Answered
Can anyone help me with understanding this code?
Did you read the documentation for arrayfun? That seems like a good place to start. The part with 'un' is a bit more tricky tho...

4 days ago | 0

Answered
How can i read exact value (as it is) from csv file and separate data using empty row? ver.16b
The readfile function you can find here will read a file to a cell array, one line per cell. It will preserve blank lines and le...

5 days ago | 0

Answered
text on image position
You can set the Unit property to Normalized. Note that this uses normal axis coordinates, so the y-axis is flipped. (the full b...

5 days ago | 0

Answered
Average multiple vectors with different lengths
Pad the shorter vectors with NaN and use the 'omitnan' flag in mean.

5 days ago | 0

Answered
pop up menu & push button
You can retrieve the selections like this String1=get(handles.popmenu1,'String'); Selection1=String1{get(handles.popmenu1,'Val...

5 days ago | 0

Answered
How can I query the content of a cell?
The same way you get the contents of any cell array: use curly braces. YourCell{n}==0 isnan(YourCell{n}) isempty(YourCell{n})...

5 days ago | 0

Answered
Read Text File in Matlab
There are many ways to do this. One of the many ways is using the code below. It makes use of the readfile function which you ca...

5 days ago | 0

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Answered
How to get a period of cosinus function ?
Because this is homework, I won't provide a copy-paste ready solution. If you follow the example from the documentation for fft...

6 days ago | 0

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Answered
Extract Strings of different lengths
The code below assumes there is only a single match for 'ETSL'. StartMETAR=strfind(rawdata,'ETSL')-19; EndMETAR=strfind(rawdat...

6 days ago | 0

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