Answered
Reodering/Swapping Arrays in a struct
You seem to be writing matlab code using C syntax. In matlab if conditions don't need to be enclosed in () brackets if a(i) > 7...

6 years ago | 0

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Answered
Are MATLAB updates supersed each other or we must install the whole packages?
Each update includes all the previous updates, you only need to install the latest even if you haven't installed the previous on...

6 years ago | 0

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How to convert a letter to a number in a cell array? Number = alphabetical order location. i.e. A = 1, B = 2, C = 3, etc.
cell2mat(yourcellarray) - 'A' + 1

6 years ago | 1

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Answered
using strrep multiple times
Use replace instead: >> usertext = 'left black left right up down upside white upleft'; >> replace(usertext, {'left', 'up', 'b...

6 years ago | 3

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How can I pass variables to eval without error suppression ?
f = @() func(numel(b), a, b); %prepare function for call evalc('f()'); %call function. () optional but make it clear we're ca...

6 years ago | 3

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Answered
Find the orientation of each arbitrary object in an image
The structure (or table if you ask for table output) returned by regionprops has a field called 'Orientation' which is the angle...

6 years ago | 1

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Select elements of a matrix based on the values of a logical array
First, have you noticed that your code doesn't work at all? It either copy all of columns 3 and 4 of A into C if B is all 1s, an...

6 years ago | 0

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Answered
Select specific number of random ones placed in a zeros matrix
m = zeros(1024, 1024); m(randperm(numel(m), 20)) = 1; %place 20 ones randomly in m.

6 years ago | 0

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Answered
how to read a string
split = textscan(tline, '%s%f%f%f'); txt = split{1} numbers = cell2mat(split(2:end))

6 years ago | 0

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Answered
How do I track the number of instances of a given handle?
I'm curious what you mean by "inheriting that class appears to put a lot of constraints on what I can do with my existing code i...

6 years ago | 0

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How to get field value from a struct as a variable in order to use in a code?
There's no need to. Creating separate variables is usually not a good idea. Wherever you were going to use X, use yourstruct.X. ...

6 years ago | 2

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Answered
Having trouble finding the mean of array elements between two indices
See my comments to the question. Using a matrix, and assuming you're using R2019b since you haven't indicated a matlab version:...

6 years ago | 0

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Add empty cell inside a cell array considering a single array
Surely, by now, with all the questions you've asked, you should be able to manipulate cell arrays yourself. Anyway: desiredlen...

6 years ago | 0

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Answered
Is it possible to use a variable name like this within Matlab?
Confusingly, variable names can mean two different things now in matlab. A generic variable name, e.g. >> A = 5 is limited to ...

6 years ago | 2

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Answered
Why the threshold is 0.90 used to obtain the white component from RGB channels ?
You will have to ask whoever wrote that code why they chose that threshold. Most likely, the answer will be : because it worked...

6 years ago | 0

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How to index something based on numbering order???
Here is one way: %input x = [2; 3; 7; 5; 1] %generate random matrix without worrying about the order A = rand(size(x, 1),...

6 years ago | 0

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Answered
How to assign specific colors to every quiver?
I can't remember if quiver did have children before R2014b (when the graphics system changed drastically) but since R2014b it do...

6 years ago | 0

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Why is my regular expression always greedy?
Matlab regex engine has the odd peculiarity that . also matches \n by default, whereas other engines don't. So your greedy .* in...

6 years ago | 1

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Answered
Using data from a cell
I need new variables created for each of the character vectors No! As Stephen already told you this would worst way to go about...

6 years ago | 0

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How to create a new table array combining the values every n,th element from two different table arrays
In my case I would like to add every 60 values of A to add 59 consecutive values of B So, assuming that A and B are indeed vect...

6 years ago | 0

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Answered
mod gives incorrect result
See my comment to Kalyan's answer for why your naive attempt doesn't work, and learn about floating point numbers so that you ca...

6 years ago | 2

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How do I get my matrix dimensions correct?
t_loading, v_trailertank, and co. (the random variables) are column vectors 1000 rows by 1 columns. To these you are adding x./...

6 years ago | 0

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Use rowfun to sum multiple columns by group
rowfun is not the correct function for this. rowfun applies the function by rows and consider the input variables as separate in...

6 years ago | 0

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Answered
"Index exceeds the number of array elements (11)."
You create a variable called disp: disp = 'RLC Circuit' %removed brackets which didn't anything Which shadows the built-in ...

6 years ago | 0

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What is the default varargin in the GUI callbacks? What are the differences between varargin{1} and varargin{2}.Source?
Yes, as Stephen says in his very thorough comment, that advice is utter rubbish. Don't do that it pointlessly obfuscate the code...

6 years ago | 0

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I have a Table in MATLAB. In one colum, lots of texts are seperated in comma. I wish to delimate those in seperate colums.
It's not clear what you want as an output since for each row you're going to get a different number of elements after the split....

6 years ago | 0

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mat lab terms of use
For this you should contact Mathworks directly. We're just a bunch of volunteers here.

6 years ago | 0

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Create an array iterating on another array
If I understood correctly: out = zeros(size(N)); for row = 1:size(N, 1) [isfound, where] = ismember(SP, G{row}(1, :)); %...

6 years ago | 0

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Answered
Create new .wav files around findpeak outputs
Here's how I'd do it: infile = 'C:\somewhere\somefolder\test_100m.wav'; %I'd recommend you use full path instead of relying on...

6 years ago | 1

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Answered
calculating the number of days within each month for a range of dates
You've got to learn to work with datetime arrays. There's no need to use datenum to construct datetimes, and adjusting the defau...

6 years ago | 0

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