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Rik


1,341 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
I want to delete all the headerlines and delimiters from the data in the below attached text file
The best solution is probably to read your entire file as text, then remove the header lines, then parse them with textscan.

2일 ago | 0

Answered
How to do image rotation in matlab?
It is a bit strange to store your image with getappdata on the graphics root, instead of with guidata. You will also notice that...

3일 ago | 2

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Answered
How to find the values of jump in an array?
There are several ways to solve this. Below you find a way to look over a few samples where there is a big jump. Another option ...

3일 ago | 0

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Answered
Removing adjacent duplicate numbers in rows of a matrix
You can use diff to find any repeats and remove them. The compare to eps is to avoid strange things happening once you put in de...

3일 ago | 1

Answered
How to use slider bars to view images from a dataset?
I didn't implement a case for the 0 position, so I just set the range limits from 1 to 100. %Load an example image a=imread('c...

4일 ago | 0

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how to have matlab give feedback if value in a table is outside of a given range
You mean with something like this? x = gallery('integerdata',10,[5,1],2); y = gallery('integerdata',10,[5,1],8); A = table(x,...

8일 ago | 0

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Answered
How to fix a program that does not end?
You are increasing your loop variable inside the loop: l=l+1; Is that intentional? What are you trying to achieve there? That ...

8일 ago | 0

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If else problem for year
You can do this two ways: Option 1 is to do the actual work. Is the input correct? Does the month entered actually have at leas...

12일 ago | 0

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Select 100 points either side from mouse click cooradinates
Use the x-coordinate returned by getpts to select the data. x=linspace(0,10,1000); %generate a smooth random curve y=sin(x)+p...

13일 ago | 0

Answered
Problem in coordinate conversion
This behavior is as documented. The result is in the [-pi pi] radians range. If you want to have your angles in the range [0 360...

13일 ago | 0

Answered
There is a mistake with such expressions as mod(23^12,24). MATLAB gives an answer of 0 which, given that 23 and 24 are relative primes,
The number you're trying to process is larger than flintmax(), so you can rely on single digit precision operations.

13일 ago | 0

Answered
Is there an equivalent function in Matlab 2019 to the earlier version's isunicode function?
The isunicode function may look promissing, but doesn't actually work on my test files (generated with Notepad++). The same prob...

13일 ago | 0

Answered
How replace matching string
Because your second and third condition can be merged, you can use ismember: data={'Pass','Pass{overflow :1,unbound:5,warning:9...

14일 ago | 0

Answered
Convolution of absolute magnitude =/= absolute magnitude of convolution?
Let's consider a minimal example: data=[-3 0 3]; kernel=[1 1 1]/3; Now it is easy to see that convolving first and then takin...

14일 ago | 0

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Answered
Creating a for loop to see if date exists
If you insist or keeping it as a double, you can use ismember three times, but it makes more sense to make use of the datetime c...

14일 ago | 0

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Answered
Variable is in a function file, how do I use a loop to change the value of this variable?
According to the doc you can pass extra parameters by setting an anonymous function. I see no indication in the R2014a doc that ...

15일 ago | 0

Answered
Title for a figure containing many pictures
You can also use the suptitle function. I remember it as being a native Matlab function, but I couldn't find it in the doc. You ...

18일 ago | 0

Answered
hi every one , how can i do a for cycle with diffrent vector length , thank you
You can put them in a cell array and let cell2mat handle the removal of empty elements. I have no clue what you want to do with ...

20일 ago | 0

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Answered
Name variables according to string
Why not store them in a struct array? If all mat files have the same fields that should work very well.

20일 ago | 0

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Answered
could anyone help me to solve the issue
This removes elements until your matrix is no longer valid according to your rule. It is very slow for bigger matrices, but it i...

21일 ago | 0

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Answered
How to take R-Square value as a variable
If you mean you want to access the value of the rsquare field, you can do that as with any struct (see the line of code below). ...

22일 ago | 0

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Answered
matlab piece wise function
That is a good idea of solving your problem. There is one thing you're forgetting in your logic: to trim the parts you don't nee...

22일 ago | 0

Answered
where can i download MATLAB for windows 7 32bits?
You'll have to choose R2015b or earlier. That is the latest version where there is a 32 bit version. If you need a newer version...

23일 ago | 1

Answered
Remove rows based on length of column value
Instead of implicit expansion (which can take a lot of memory for bigger arrays), you can use histogram counts: S=load('practic...

23일 ago | 0

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Answered
Can anyone help me with the error?
You aren't plotting a function, but a vector. Replace fplot by plot, or replace your input by a function. Actually, doing both w...

26일 ago | 1

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Answered
How to calculate accuracy from confusion matrix?
Accuracy = (TP+TN)/(TP+TN+FP+FN) where: TP = True positive; FP = False positive; TN = True negative; FN = False negative A...

27일 ago | 0

Answered
Could anyone help me how to solve the following issue.
I can't think of a better solution, but you could try brute-forcing it with a while loop: maxval=5;cols=10; if maxval>cols ...

29일 ago | 0

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Answered
extracting data from hex
You should only remove the leading 0x as that indicates the data is hexadecimal. data_hex={{'0x0000D830'} {'0x000103EA'} ...

29일 ago | 0

Answered
customised x data in matlab plot
The XTick property requires a vector with numeric data, but the XTickLabel property requires a cell array. labels = [0 2000 400...

29일 ago | 0

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Answered
How to create a function which accepts a name of a mat-file and returns a structure array with fields’ Name and Size?
Lets go through your proposed code: function se=se(name)%don't give your ouput the same name to your output as your function f...

29일 ago | 1

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