Community Profile

Riccardo Scorretti

Lab. Ampère - UMR 5005 CNRS, France

Last seen: Today Actif depuis 2020

Programming Languages:
C, MATLAB
Spoken Languages:
English, French, Italian
Professional Interests:
Electromagnetics, Finite Element Analysis (FEA)

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how to plot graph for specific points
Assuming that variables a, b, ... j make sense, you can do more or less like this: x = [1 2 3 4 5 7 8 9]; y = [a b c d e f g h...

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how to differentiate this function
Assuming that you want to differentiate ph and a with respect of r, you have several options (and the best option depends on wha...

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contour level appointing problem
Hi Asliddin, the problem is that in your own data sometimes the value for which you wish to plot the isovalue does not exist. S...

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if else statement with strings
That's being said, your problem is (most probably) that you wish to ask the user to enter a string: filter_option = input(msgou...

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functions not working for a matrix created in for loop.
It gives that error the second time you run the code; the very first time it works nice. The problem is that in the last line: ...

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How do I make my fprintf columns output neatly?
Hi. I think it is better to work with fixed length fields rather than tabulations (which have the problem of being system-depend...

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Colormap limits between 0 and 1
I think you have to rescale the plotted quantity. That is: val = mean(abs(Ex).^2 + abs(Ey).^2, 3); val = val / max(val(:)); p...

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How to distribute random number of users within the different circles
That's ok? % Coordinates (x0,y0), radius (rad) and number of users (nbu) for each circle x0 = [100 450 500 650 900 900 800]...

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Table define colums in more columns
Perhaps you need something like this? load Test_Table.mat tab = table('Size', [numel(Test_Table) 3], ... 'VariableNames',...

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Why these two similar operations (a sparse matrix w/o transpose times a vector) take different time to finish?
Interesting. I tried to see what happens with matrix of different sizes: n = round(logspace(1, 6, 30)); t = []; figure for k...

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Diagonal sums with non-zero elements
Hi Ingrid, I guess you mean you want to compute te sum of the diagonals of the permuted matrices containing all non-zero elemen...

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How to correct the error in code?
Hi Susan, there is a macroscopic error in your code: F1=@(A)(-H(x,:).*log(1+A(x,:))+a1(k).*(G(x,:)-A(x,:))); You defined an...

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Error while using a function instead of a .csv file
n = 5:40; % these are the limits of the function n runs from 5 to 40: you are bound to have problems when trying to evaluat...

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Coding a "Are you sure you want to exit?" prompt when exiting app GUI
You could modify the code of callback ExitPressed more or less in this way: answer = questdlg('Are you sure you want to exit?',...

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Eig Argument Command Error
Hi. The problem is not with the size of K and M; the problem is that in your code K and M are symblic variables. Juste convert t...

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i m trying interpret this simple matrix code..
rand('seed',345); B = randi([-150,300], 10, 7); [y,in] = sort(B(:,3)); You are sorting a column vector (= the 3rd column of B...

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for loop to evaluate every minute
% Setup variables data = [ 20 1 20 1 0 0 375 0 200 0 20 1 50 0 150 0 ...

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Calculate the required area
Let's start by checking the function g = profile of your building: g = @(x, y) 1./((2+1.1.*x.^2+1.1.*y.^2).^(1/2)); a=0.0; b=...

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Can a for statment contain a matrix
The problem is formulated in a somehow unclear way. However, assume that we have a 200x1 matrix: % Generate some random data, f...

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several minimum values on a vector
I'm not sure to understand completely the question, hower you can use find to get all the values which are strictly equal to the...

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How to integrate given the two data columns
Most probably like this: CHARGE = sum(CURRENT(1:end-1) .* diff(tz));

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Reversing a part of matrix
Another way (more efficient, I think) is to do a swp by hand: M=[10 20 30 40 50 60 70 80 90 100]; t = randsample(10, 2) % I ...

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Reversing a part of matrix
A possible way is to pass through an vector of index (= ind in the code hereafter): M=[10 20 30 40 50 60 70 80 90 100]; t = ra...

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How to resize UI table to fill window?
Hi Logan, setting Units to normalized is not enough: you have to modify also the property Position: LastName = {'Sanchez';'Jo...

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I would like my code to allow the user to plot as many circles as they want until the user right clicks, if the circle plotted intersects any other circle it must change color
Hi. Here is a possible implementation of what you want. Basically, the set of circles are stored in arrays setOf_xc, setOf_yc an...

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There is a problem with the find function
Dear 文辉 沈 , the result you obtain is quite logical. Consider the following example: bw = zeros(4, 5) ; bw(end,2:4) = 1 You a...

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Solving Inverse Kinematics using pseudo-inverse Jacobian method

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How to plot pixel intensity as a function of pixel position (beginner)
Hi. You obtain an empty plot because you use mean2, which returns the average of the full image (= a single value): % Load the ...

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Solving Inverse Kinematics using pseudo-inverse Jacobian method
Hi David, in your code you tried to use the Symbolic Computational Toolbox. Personally, for such a problem I prefer to go nume...

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How can I locate a vortex center?
Nice problem! I propose the solution based on the rationale that the center of the vortex (assuming that there is only one vorte...

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