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Philippe Lebel


Last seen: 9 months ago
49 total contributions since 2018

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Answered
How do I add a column vector or matrix to a 6X6 original matrix?
here is an example: clear all zeros_col = zeros(142,1); c11 = (1:142)'; fantastic_matrix = [c11 zeros_col zeros_col zeros_co...

10 months ago | 0

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Answered
the loop does not display results
You are not looping over the values of "i" nor "j" i=1:length(X(:,1)) i = 1 2 3 4 5 6 7 ...

10 months ago | 0

Answered
Better parallelization than parfor?
maybe take a look at arrayfun(). https://www.mathworks.com/help/matlab/ref/arrayfun.html

10 months ago | 0

Answered
Elements of table equal to elements of another table
Here you go: I loop over all station names and check where in the data table i find these names. I generate a boolean index in ...

10 months ago | 0

Answered
How to set the function to be able to use all variables in the script without need to be named in the function def?
i would suggest creating a struct containing the required variables. %my script params.a = 1; params.b = "very string" param...

10 months ago | 0

Answered
How can i speed up my function?
In order to help you in a significant way, it would be useful to have a sample data set on which we could run the function. On ...

11 months ago | 1

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Answered
Differential equation and problem with minmax
This error message tells you that you don't have the required package installed in order to use the minmax() function. Matlab c...

11 months ago | 0

Answered
Decrease time to upload a figure
In addition to @Looky 's answer, try to remove the set(gca, 'YDir','reverse') from the while loop, I'm pretty sure you only n...

12 months ago | 1

Answered
How to plot curve with one color without precising which color it is?
aloa for i = 1:10 if i == 1 h = plot(1:10,1:2*i:20*i) v = get(h,'Color'); else plot(1:10,1...

12 months ago | 0

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Answered
Deleting plotted image from a figure if conditions are met
If you get the handle of the plot like so: h = plot(1,1,'Xr') you can just delete the handle and the data disapears delete(h)...

12 months ago | 0

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Answered
Does anyone know why it is also taking point 9 as convex hull point eventhough it shouldn't?
By observation, points 8, 9 and 10 are on the same line. You have to add a condition to decimate redundant points. (points that...

12 months ago | 0

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Answered
How to crop detected face part?
RGB Images are 3D matrices with dimenions = (resolution_x, resolution_y, 3) I suppose the bounding box contains the face. Try ...

12 months ago | 1

Answered
How to extract matrix from a bigger matrix based on threshold of each column?
here is my try based on what i understood. given a matrix a nx3: a = [5,6,8;1,2,3;2,3,4;3,4,5;4,5,6] a = 5 6 ...

12 months ago | 0

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Answered
Block diagonal matrix of identity times scalar.
here is my take. a=[1,2]; c = round(a(1):1/(length(b(:,1))-1):a(2)); matrix = diag(c);

12 months ago | 0

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Answered
add vertical line on a plot for Confidence intervalle.
Have you tried this function? https://www.mathworks.com/help/matlab/ref/errorbar.html

12 months ago | 0

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Answered
Is it possible to perform additional operation on job cancellation?
Checkout this function: https://www.mathworks.com/help/matlab/ref/oncleanup.html

12 months ago | 1

Answered
How can I fill my cell array?
here is my try: U{1} = [1,2]; U{2} = [2,3]; T = [1,2,3]; S = {}; for i = 1:length(T) temp_cell = {}; k=1; f...

12 months ago | 0

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Answered
How do i create a projectile?
as example for a non-accelerating projectile (which is not your case) this could look like time = 0:1:100; % time goes from 0 t...

12 months ago | 0

Answered
Creating Sine wave with random values
here is my try: random_phase_offset = rand(1,1)*2*pi; max_amplitude = 20; random_amplitude = rand(1,1)*max_amplitude; t = ...

12 months ago | 1

Answered
Saving each data from for loop
If you want to store elements (like strings) that are not the same size you can use cells. A = {'abc', 'defg', 'hijklmnop', 1...

1 year ago | 0

Answered
basic question about matrices
As i think this is an homework i'd suggest reading: https://www.mathworks.com/help/matlab/ref/ones.html https://www.mathworks....

1 year ago | 0

Answered
how can i change an indice in Matrix as vector?
Now i understand. Here is a solution that you can easily expand. clear protein(1).name = 'A'; protain(1).bool_value = [1...

1 year ago | 1

Answered
how can i change an indice in Matrix as vector?
I am not sure what you are trying to do as a whole, but if you want to quickly find where there are occurences of a certain stri...

1 year ago | 1

Answered
problem in optimization by MATLAB using genetic algorithm
Try to see if the problem is not the same as in this question: https://www.mathworks.com/matlabcentral/answers/76730-genetic-al...

1 year ago | 1

Answered
Create a string array (MxN) where each element is a repeated character based off a numeric array (MxN)
try this: B = arrayfun(@(x) repmat('#',1,x),A, 'UniformOutput', false) B = '####' [1x0 char] '#' '####...

1 year ago | 2

Answered
Delete - Variance vs standard deviation when using var() and std() with decimal values from CSV file?
Isn't this normal? As the variance is the square of the standard deviation? 0.1^2 = 0.01

1 year ago | 0

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Answered
Unknown operation performed.
This is called logical (or boolean) indexing. https://www.mathworks.com/company/newsletters/articles/matrix-indexing-in-matlab....

1 year ago | 0

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Solved


Extract leading non-zero digit
<http://en.wikipedia.org/wiki/Benford%27s_law Benford's Law> states that the distribution of leading digits is not random. This...

1 year ago

Solved


Determine if input is odd
Given the input n, return true if n is odd or false if n is even.

1 year ago

Solved


Make the vector [1 2 3 4 5 6 7 8 9 10]
In MATLAB, you create a vector by enclosing the elements in square brackets like so: x = [1 2 3 4] Commas are optional, s...

1 year ago

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