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# Philippe Lebel

39 2018 年以降の合計貢献数

#### Philippe Lebel's バッジ

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...

4日 前 | 0

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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 ...

5日 前 | 1

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 ...

6日 前 | 0

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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);

9日 前 | 0

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

11日 前 | 0

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

12日 前 | 1

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日 前 | 0

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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日 前 | 0

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日 前 | 1

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...

13日 前 | 0

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

13日 前 | 0

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...

13日 前 | 1

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...

13日 前 | 1

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...

13日 前 | 1

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] '#' '####...

13日 前 | 2

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

16日 前 | 0

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

17日 前 | 0

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

17日 前

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

18日 前

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...

18日 前

MATLAB Basic: rounding
Do rounding near to zero Example: -8.8, answer -8 +8.1 answer 8

18日 前

Find the maximum number of decimal places in a set of numbers
Given a vector or matrix of values, calculate the maximum number of decimal places within the input. Trailing zeros do not coun...

18日 前

Run Linux Terminal Command on my External ROS Device

18日 前 | 0

Obtain the Waviness of Graph
Does this help you get what you wnat (didn t have the time to finish with the loading ond plotting of data 1) here is the c...

19日 前 | 1

You are over writing the variables each loop! I'd do it this way: data = csvread('C:\Users\User\Documents\Signal processin...

19日 前 | 1

How to measure object size from an image in real world if distance is known ?
here is the answer: https://www.scantips.com/lights/subjectdistance.html scroll to where there is a diagram with the lense, ...

20日 前 | 0

2D Matrix revolution
Have you tried this function? https://www.mathworks.com/matlabcentral/fileexchange/15559-solids-of-revolution

20日 前 | 0

Mean of array columns with condition
I tested my solution with these matrices: a = rand(6,3) B=[1;0;1;1;0;1]; means_active = mean(a(logical(B)),2); seems to wo...

20日 前 | 0

How do I build a text file with readable variable names?
I would try to set the 'PreserveVariableNames' flag to 'true' when uusing datastore. something like: datastore('very_file.cs...

23日 前 | 0

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When matrix is close to singular or badly scaled
My best guess is that when a matrix is close to being singular, tiny numerical errors will have an increased impact on the resul...

23日 前 | 1