# Nicolas Douillet

### PhD, INRIA and CNRS alumni

Interested in computational geometry, image processing, 3D reconstruction, mesh processing, mesh generation, arithmetics.

**Programming Languages:**

MATLAB

**Spoken Languages:**

English, French

**Professional Interests:**

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**Content Feed**

Solved

Spherical radius given four points

Determine the radius of a sphere provided four non-coplanar points on the surface of the sphere. pts = [x1 y1 z1; x...

5 hours ago

Are there marker types sensitive to light ?

No answer, so I guess the answer is no (?) Edit : solved, cause actually pretty much the same question as this one.

1 day ago | 0

Submitted

Tetrahedron insphere

Function to compute and display the insphere of any given tetrahedron. Help, doc, examples included.

1 day ago | 2 downloads |

Submitted

Tetrahedron circumsphere

Function to compute the centre and the radius of the circumsphere to a given tetrahedron. Help, doc, examples included.

2 days ago | 5 downloads |

Solved

Back to basics 23 - Triangular matrix

Covering some basic topics I haven't seen elsewhere on Cody. Given an input matrix, return a matrix with all elements above a...

3 days ago

Solved

Back to basics 21 - Matrix replicating

Covering some basic topics I haven't seen elsewhere on Cody. Given an input matrix, generate an output matrix that consists o...

3 days ago

Solved

Sum of series VII

What is the sum of the following sequence: Σ(km^k)/(k+m)! for k=1...n for different n and m?

3 days ago

Solved

Sum of series

a(n) = n^2 - (n-1)^2 find the summation of the series upto n i.e. a(1)+a(2)+...+a(n)

3 days ago

Solved

Sum of series IX

What is the sum of the following sequence: Σ 1/k! for k=1...n for different n?

3 days ago

Solved

Sum of series VI

What is the sum of the following sequence: Σk⋅k! for k=1...n for different n?

3 days ago

Solved

Sum of series V

What is the sum of the following sequence: Σk(k+1) for k=1...n for different n?

3 days ago

Solved

Sum of series IV

What is the sum of the following sequence: Σ(-1)^(k+1) (2k-1)^2 for k=1...n for different n?

3 days ago

Solved

Sum of series III

What is the sum of the following sequence: Σ(2k-1)^3 for k=1...n for different n?

3 days ago

Solved

Sum of series II

What is the sum of the following sequence: Σ(2k-1)^2 for k=1...n for different n?

3 days ago

Solved

Sum of series I

What is the sum of the following sequence: Σ(2k-1) for k=1...n for different n?

3 days ago

Solved

Whether the input is vector?

Given the input x, return 1 if x is vector or else 0.

3 days ago

Solved

Vector creation

Create a vector using square brackets going from 1 to the given value x in steps on 1. Hint: use increment.

3 days ago

Solved

Doubling elements in a vector

Given the vector A, return B in which all numbers in A are doubling. So for: A = [ 1 5 8 ] then B = [ 1 1 5 ...

3 days ago

Solved

Flip the vector from right to left

Flip the vector from right to left. Examples x=[1:5], then y=[5 4 3 2 1] x=[1 4 6], then y=[6 4 1]; Request not ...

3 days ago

Solved

Get the length of a given vector

Given a vector x, the output y should equal the length of x.

3 days ago

Solved

Is A the inverse of B?

Given a matrix A and a matrix B, is A the inverse of B? >>A=[2,4;3,5]; >>B=[-2.5,2;1.5,-1]; >>isInverse...

3 days ago

Solved

Calculate the average value of the elements in the array

Calculate the average value of the elements in the array

3 days ago

Solved

Rotate Matrix @180 degree

Rotate Matrix @180 degree Example A=[8 1 6; 3 5 7; 4 9 2], then answer would be [2 9 4;...

3 days ago

Solved

Square root

Given x (a matrix), give back another matrix, where all the elements are the square roots of x's elements.

3 days ago