Adrien Leygue

CNRS / Ecole centrale Nantes

Last seen: 1 giorno fa | Attivo dal 2011

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Professional Interests: Complex Fluids, Material Science, Numerical Methods, Model Reduction

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Domanda

Tensor creation like "pageTensorprod"?
I have two 3x3xN tensors (let's call them A and B) which I would like to combine into a 3x3x3x3xN tensor. More specifically I w...

6 mesi fa | 1 risposta | 0

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Domanda

writestruct does not reproduce the input of readstruct
I find it disturbing that applying writestruct on a structure created with readstruct does not reproduce the original input: see...

7 mesi fa | 1 risposta | 0

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Risolto

Return unique values without sorting
If the input vector A is [42 1 1], the output value B must be the unique values [42 1] The *values of B are in the s...

quasi 7 anni fa

Risolto

Matrix indexing with two vectors of indices
Given a matrix M and two index vectors a and b, return a row vector x where x(i) = M(a(i),b(i)).

quasi 7 anni fa

Risolto

Getting logical indexes
This is a basic MATLAB operation. It is for instructional purposes. --- Logical indexing works like this. thresh = 4...

quasi 7 anni fa

Risolto

Return elements unique to either input
Given two numeric inputs a and b, return a row vector that contains the numbers found in only a or only b, but not both. For ex...

quasi 7 anni fa

Risolto

We love vectorized solutions. Problem 1 : remove the row average.
Given a 2-d matrix, remove the row average from each row. Your solution MUST be vectorized. The solution will be tested for ac...

quasi 7 anni fa

Risolto

Set the array elements whose value is 13 to 0
Input A either an array or a vector (which can be empty) Output B will be the same size as A . All elements of A equal to 13...

quasi 7 anni fa

Risolto

Replicate elements in vectors
Replicate each element of a row vector (with NaN) a constant number of times. Examples : n=2, A=[1 2 3] -> [1 1 2 2 3 3] n=0...

quasi 7 anni fa

Risolto

Find the largest value in the 3D matrix
Given a 3D matrix A, find the largest value. Example >> A = 1:9; >> A = reshape(A,[3 1 3]); >> islargest(A) a...

quasi 7 anni fa

Risolto

Check if number exists in vector
Return 1 if number _a_ exists in vector _b_ otherwise return 0. a = 3; b = [1,2,4]; Returns 0. a = 3; b = [1,...

quasi 7 anni fa

Inviato

Plane fit
Fits a plane to a set of data points by minimizing the normal quadratic distance

quasi 9 anni fa | 25 download |

Risolto

The Hitchhiker's Guide to MATLAB
Output logical "true" if the input is the answer to life, the universe and everything. Otherwise, output logical "false".

oltre 11 anni fa

Risolto

Reverse the vector
Reverse the vector elements. Example: Input x = [1,2,3,4,5,6,7,8,9] Output y = [9,8,7,6,5,4,3,2,1]

oltre 11 anni fa

Risolto

Remove any row in which a NaN appears
Given the matrix A, return B in which all the rows that have one or more <http://www.mathworks.com/help/techdoc/ref/nan.html NaN...

oltre 11 anni fa

Risolto

Make a checkerboard matrix
Given an integer n, make an n-by-n matrix made up of alternating ones and zeros as shown below. The a(1,1) should be 1. Example...

oltre 11 anni fa

Risolto

Column Removal
Remove the nth column from input matrix A and return the resulting matrix in output B. So if A = [1 2 3; 4 5 6]; and ...

oltre 11 anni fa

Risolto

Distance walked 2D
Suppose you go from x-y coordinates [3,4] to [0,0] to [0,1] to [1,1], then you walked 7 units of distance.

oltre 11 anni fa

Risolto

Add two numbers
Given a and b, return the sum a+b in c.

oltre 11 anni fa

Risolto

Find the sum of all the numbers of the input vector
Find the sum of all the numbers of the input vector x. Examples: Input x = [1 2 3 5] Output y is 11 Input x ...

oltre 11 anni fa

Risolto

Geometric series
Find the sum, given the first term t1, the common ratio r, and number of terms n. Examples If input t1=1, r=1, n=7 the...

oltre 11 anni fa

Risolto

Nearest
*Description* Find the value and index of the element in vector _x_ that is nearest to value _y_. _y_ should be able to be a ...

oltre 11 anni fa

Risolto

Times 2 - START HERE
Try out this test problem first. Given the variable x as your input, multiply it by two and put the result in y. Examples:...

oltre 11 anni fa

Risolto

Select every other element of a vector
Write a function which returns every other element of the vector passed in. That is, it returns the all odd-numbered elements, s...

oltre 11 anni fa

Risolto

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...

oltre 11 anni fa

Risposto
Is it possible to solve FEM by Neural Network?
This kind of problem is typically the case where one would use model reduction techniques. I would refer you to methods such as ...

oltre 12 anni fa | 2

Risposto
Condition
Try this: A = rand(1,10); B = A(A<0.5); C = zeros(size(A)); mask = A<0.5; C(mask) = A(mask); I think this could provide so...

oltre 12 anni fa | 0

Risposto
Are iterative methods always better than direct methods for solving large linear systems?
From my personal experience, there is only one case where I have been able to outperform mldivide through the use of one of the ...

oltre 12 anni fa | 1

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Risposto
ODE45
First the step in ode45 has little meaning since the method is adaptive and will choose the appropriate time step based on a pre...

oltre 12 anni fa | 1

Risposto
Find max of matrix without using built in function.
The following code will extract the minimum over each column. No loop no max no min and of course not optimal. Feel free to adap...

oltre 12 anni fa | 0

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Adrien Leygue

CNRS / Ecole centrale Nantes

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