Solved

Sum My Indices
Given inputs M and N (in that order), output an MxN matrix whose entries are equal to the sum of their indices. Example input...

7 months ago

Solved

Getting the indices from a matrix
Inspired by Problem 645. Getting the indices from a matrix. Given a matrix A (or a vector), return the indices (always in row...

7 months ago

Solved

First non-zero element in each column
For a given matrix, calculate the index of the first non-zero element in each column. Assuming a column with all elements zero i...

7 months ago

Solved

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] ...

7 months ago

Solved

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...

7 months ago

Solved

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

7 months ago

Submitted

Isprime optimus [FAST]
Primality test using isprime Matlab(r) stock function, but ~60% faster. Based on Nicolas Douillet 'Christmas eve prime squares e...

7 months ago | 1 download |

Submitted

alGolbach
Algorithm to compute and list every Goldbach couples of prime numbers which sum equals the given -even- input

7 months ago | 1 download |

Submitted

Prime numbers spirals
Functions to display prime numbers spiral and prime squares spiral. Also check primes sum and prime squares spiral length.

7 months ago | 4 downloads |

Answered
Quickest way for alternate indexing a vector
Thank you all for your interest and answers :-) I am going to test them, pick the best in my case, and then choose for the co...

7 months ago | 0

Question

Quickest way for alternate indexing a vector
Hey, I am looking for the quickest way to create a vector like this : u = [5 7 11 13 17 19 23 25 ...

7 months ago | 5 answers | 0

5

answers

Submitted

Sample triangle (2D, 3D, ND)
Function to generate a triangular sampling grid of a given triangle

11 months ago | 2 downloads |

Submitted

Projective geometry demo
A "pedagogic" demo of projective geometry showing some mathematical objects projections

11 months ago | 2 downloads |

Submitted

Mesh ovoid
Function to compute, display, and save a meshed ovoid

11 months ago | 2 downloads |

Answered
Apparent distance conservation in Matlab plot window while rotating 3D objects
Ok I realized I have to be even clearer. I am going to eplore the camera toolbar possibilities -which I didn't really know unti...

11 months ago | 0

Submitted

Apollonian gaskets
Function to compute and display the apollonian gasket of any 3D triangle or 3D regular polygon

11 months ago | 1 download |

Submitted

chat with HAL9000 !
chat with HAL9000 and try to survive it ! ^_^

11 months ago | 2 downloads |

Submitted

Meshed Reuleaux tetrahedron
Function to compute, display, and save a meshed Reuleaux tetrahedron

11 months ago | 1 download |

Question

Apparent distance conservation in Matlab plot window while rotating 3D objects
Hey, When you plot a 3D object in Matlab and turn it around the apparent distance to this object will change, even if you set...

12 months ago | 2 answers | 0

2

answers

Submitted

Regular polyhedron inscribed sphere
Function to compute and display the inscribed sphere of a regular polyhedron.

1 year ago | 1 download |

Answered
Rendering problem with surf and trisurf
Any clue ? Thank you.

1 year ago | 0

Question

Rendering problem with surf and trisurf
Hey, When I use surf or trisurf functions to plot a 3D plane made of several ploygons (triangles or squares for instance), I ...

1 year ago | 1 answer | 0

1

answer

Submitted

isinside2Dset
Function to check if a vertex is located inside or outside a given 2D set.

1 year ago | 1 download |

Submitted

Jerusalem cube
Function to compute, display, and save the Jerusalem cube at any iteration. Help, doc, and examples included.

1 year ago | 1 download |

Submitted

Sierpinski ball
Function to compute, display, and save the Sierpinski ball (fractal sponge) based on the regular octahedron

1 year ago | 1 download |

Solved

generate number in particular way
A = [1 5 2 7]; MAX = 10; generate a array Y = [1 2 2 2 2 2 3 3 4 4]; i.e. total eleme...

1 year ago

Solved

Find the sum of the elements in the "second" diagonal
Find the sum of the elements in the diagonal that starts at the top-right corner and ends at the bottom-left corner.

1 year ago

Submitted

3D printable Christmas star
Function to compute, display and save a 3D printable Christmas star.

1 year ago | 1 download |

Submitted

3D printable Koch snowflake
Function to compute, display, and save the triangular base 3D Koch snowflake at any iteration. Help, doc, examples included.

1 year ago | 2 downloads |

Submitted

Cube base 3D Koch snowflake
Function to compute, display, and save the cube base Koch snowflake, at any iteration. 3D printable ready option. Help, doc, exa...

1 year ago | 4 downloads |