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Guillaume


University of Brighton

7.209 total contributions since 2012

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Answered
Issues with Converting dates into the right datetime format
'Format' specifies the display format of datetime. It does not specify the format of the input to datetime. You specify this for...

alrededor de 3 horas ago | 0

| accepted

Answered
datastore multiple delimiter (space, tab)
I should have spotted that straightaway, the way to specify control characters is with a backslash \, not a forward slash /. ds...

alrededor de 3 horas ago | 0

Answered
Can i save excel files in app designer
You can save any variable of your App to excel, using either xlswrite or writetable. %... in the app class function SaveToExc...

alrededor de 3 horas ago | 0

Answered
Symmetric binary matrix with diagonal 0 values
Guaranteed to work on the first try: Msize = 10; %size of square matrix N = 20; %number of ones on each side of the diagonale...

alrededor de 17 horas ago | 0

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Answered
Change Matlab Version from R2014a to R2018a
If you're going to upgrade, you may as well upgrade to the latest version, currently R2019b. Code that worked in 2018a should wo...

alrededor de 20 horas ago | 0

Answered
Index exceeds the number of array elements. Please Help?
Does anyone have any idea why i get the following error on line 15 Because the x you passed has less than 300 elements. Since i...

alrededor de 20 horas ago | 0

Answered
Output must be a column vector
It looks like your error message comes from an ODE solver. It's the ODE solver that calls your function, so it's unclear what yo...

alrededor de 20 horas ago | 0

Answered
Vectorisation of code for insertion of n x n matrices in a 3D array along the diagonal of a large matrix
Note: I don't see how you can get a 4 at M(2, 1) if maxRand is 3. Here is one way, no guarantee that it's faster than a loop. W...

alrededor de 22 horas ago | 0

Answered
Timer Interrupt in App Designer
app.t.TimerFcn = @app.DisplayFPS; %<--DisplayFPS is a method of the app, so must be called with app argument

1 día ago | 1

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Answered
parking space using IMAGE PROCESSING
You've cut the error message and removed the most important bit, the last part which told you which line of your code is respons...

1 día ago | 0

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Answered
Adding elements of a matrix based on an if condition
There is no rblush in your code. Note that sum(scalar_value) is simply scalar_value. The code you've written does not work at a...

3 días ago | 0

Answered
Help with using summation functions in matlab (Trying to create an atomic scatter function)
function scatterfactor = calculatescatteringfactor(Z, s, a, b) assert(numel(s) == 1, 's must be scalar'); assert(isequ...

3 días ago | 0

Answered
find second minimum in a row in matlab without sorting
Use mink A = [ 3.5 2 1.6 1.456 0 1.9 2.6 ; 3.8 2.6 3.9 0 6 1.564 0 ]; minvals = mink(A, 2, 2); %first 2 miminums along dimen...

3 días ago | 1

Answered
How to read .txt file and convert the characters of .txt into cell formation
You ought to read the documentation of the functions you use if you don't know how they work. fopen doesn't read a file. All it ...

3 días ago | 0

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...

3 días 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...

3 días ago | 0

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

4 días ago | 2

Answered
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...

4 días ago | 2

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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...

4 días ago | 1

Answered
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...

4 días 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.

5 días 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))

5 días ago | 0

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...

5 días ago | 0

Answered
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. ...

5 días 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:...

5 días ago | 0

Answered
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...

5 días 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 ...

5 días 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...

5 días ago | 0

Answered
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),...

5 días ago | 0

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