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Replace groups of numbers in a matrix checking connections in 8-directions
This can indeed be easily achieved with <https://www.mathworks.com/help/images/ref/regionprops.html |regionprops|> of the image ...

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How to compare a group of values in a data set to each other using vectorization?
Basically you want to find the duration of each run of power drop. As you've already established finding the power drops is a si...

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Convert .p to .m
This is not possible. The whole purpose of p code is that you can't get the plain text version.

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How can I rescale an histogram ?
Your code would be so much easier to understand if you'd used meaningful variable names instead of useless |xx|, |yy|, |S|, etc....

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xmlwrite : Attributes are alphabetically sorted
_What I need is ...:_ Then what you need is not xml. A compliant xml writer is explicitly allowed to order tags and attribute...

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distribution of consecutive numbers
I don't think there's a way t do that without a loop (either explicit or with |arrayfun|). %build list of patterns to searc...

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problem of generations of values in a matrix
The first thing your code should do is check if the inputs are compatible and return an throw an error message explaining the pr...

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How can I write the Twos complement and return a hex string ?
There's a reason I ask all these questions. I don't believe you've thought properly about what it is you're asking. As I keep sa...

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Matrix elements where row index higher than column index
sum(sum(tril(M, -1))) is one way to do it.

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How to run large SQL statements on new lines
Your question is really about how to input a char vector using more than one line: SQL = ['select table.leg_no ', ... ...

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how to convert a matrix mxn to mxnx3?
I suspect what you want is not to turn your point cloud into an image, but simply to plot your point cloud. This is easily achie...

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get month of date from string
_what is the problem?_ Your cell array |date| contains some dates that are not valid and are thus converted to NaT (Not a Tim...

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Remove specific characters from cell array
* extract elements 2 to 5: cellfun(@(x) x(2:min(end, 5)), yourcellarray, 'UniformOutput', false) the |min(end, 5)| is to...

más de 7 años hace | 0

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Looking for all sub-networks among a network
Please don't post screenshots, particularly as it's trivial to write your matrix as text in the question. We can't copy/paste sc...

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Vectorizing gives slightly different solution
There are three problems with your vectorised version: # you repmat |alpha| at each step of the |j| loop. Not critical, just ...

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How do I exclude certain lines from data files?
It sounds like your original code is very fragile. Looking at the portion you show, it's also not very efficient since there's a...

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Could someone explain how this code works?
I'm not sure what there is to explain. <https://www.mathworks.com/help/matlab/ref/ismember.html As documented>, |col| tells you ...

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Assignment has more non-singleton rhs dimensions than non-singleton subscripts?
k = 6; A = cellfun(@(edge) find(edge == k), edges, 'UniformOutput', false) The loopy version of that: k = 6; %n ...

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Writing a lap time sim tool
Probably, the first thing you need to settle on is what form your inputs will take. If I understand your requirements, I would h...

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Call subfunction many times: Nested or local
As Matt said, there's no function call at all in your 2nd example. Function calls (nested, local, or otherwise) are expensive so...

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Event listener not picking up GUI data
The problem has nothing to do with the name of the GUI. The problem is simply that |guidata| wants a figure handle (or other gra...

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find cycle in array
There are no built-in algorithms in matlab to find cycles in graphs (undirected or directed). You'll either have to write your o...

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Facebook data utf-8 string decode
Sorry, I never saw that you finally gave the raw json in your original question. Otherwise, I would have responded. The probl...

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How to preallocate memory for storing data in same mat file?
Depending on what |distance1_matlab| does, this code could be significantly improved. I'm also assuming that all files that m...

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How to remove the background from an image and only remain the main objects ?
The easiest way to solve your problem is to change your imaging setup by for example using a basket of a significantly different...

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resizing an image not working.
For a greyscale image, your code is correct (as long as the size of the image is even) although note that iterating over rows in...

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Why i get the out of bound error in this code?
_Why i get the out of bound error in this code_ Because by the time |b| equals 4, you've removed enough elements from |myset|...

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Why is this code "running without output"?
Matlab's editor has live syntax highlighting and error checking. When you write code in the editor, it shows you what can possib...

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How do I add values to a vector instead of replacing them?
All the answers assume you want to create a matrix, I'm not sure that's what you want since you mention a vector. In any case, I...

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