Community Profile # Andrea La Spina

### Columbia University

Active since 2019

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Export figure for LaTeX documents
High-precision tool to export a figure to pdf matching the font size and the text width of a LaTeX document. Submitted

Easy definition of arbitrarily sized functions and effective computation of gradient and divergence operators. Submitted

Solution of 2D Navier-Stokes equations Submitted

Solution of 2D Navier-Stokes equations Submitted

2D scalar equation of a convection-diffusion-reaction problem Submitted

2D scalar equation of a convection-diffusion problem Submitted

1D scalar equation of a convection-diffusion-reaction problem with piecewise linear approximation Submitted

1D scalar equation of convective-diffusion transport with piecewise linear approximation Submitted

1-D wave propagation in microstructured materials
This script performs a numerical simulation of the wave propagation in microstructured materials. Submitted

Euler-Bernoulli VS Timoshenko beam
Construction of the stiffness and the mass matrix for the Euler-Bernoulli and the Timoshenko beam Submitted

Armstrong-Frederick cyclic hardening plasticity
This is an easy and interactive example of Armstrong-Frederick cyclic hardening plasticity model Submitted

Newton-Raphson method
Easy application of Newton-Raphson algorithm Submitted

SDOF subjected to a seismic input
This is the study of a SDOF subjected to a seismic input Submitted

Dynamic response of a building subject to a seismic input
Dynamic response of a building subject to a seismic input Solved

Height of a right-angled triangle
Given numbers a, b and c, find the height of the right angled triangle with sides a and b and hypotenuse c, for the base c. If a...

casi 3 años ago

Solved

Parallel vectors
Return true or false depending on whether 2 vectors are parallel or not. Vectors can be 2 or 3 dimensional. The origin is not c...

casi 3 años ago

Solved

Volume difference between Ellipsoid and Sphere
Given an ellipsoid of semi principal axis (a,b,c) find the volume of the difference between this ellipsoid and the sphere with...

casi 3 años ago

Solved

Generate a vector like 1,2,2,3,3,3,4,4,4,4
Generate a vector like 1,2,2,3,3,3,4,4,4,4 So if n = 3, then return [1 2 2 3 3 3] And if n = 5, then return [1 2 2...

casi 3 años ago

Solved

Pangrams!
A pangram, or holoalphabetic sentence, is a sentence using every letter of the alphabet at least once. Example: Input s ...

casi 3 años ago

Solved

Number of Even Elements in Fibonacci Sequence
Find how many even Fibonacci numbers are available in the first d numbers. Consider the following first 14 numbers 1 1 2...

casi 3 años ago

Solved

Perimeter
Given a sequence of points forming a closed path (first and last points are coincident) return the perimeter value. For example...

casi 3 años ago

Solved

The Goldbach Conjecture
The <http://en.wikipedia.org/wiki/Goldbach's_conjecture Goldbach conjecture> asserts that every even integer greater than 2 can ...

casi 3 años ago

Solved

Magic is simple (for beginners)
Determine for a magic square of order n, the magic sum m. For example m=15 for a magic square of order 3.

casi 3 años ago

Solved

Is this triangle right-angled?
Given three positive numbers a, b, c, where c is the largest number, return *true* if the triangle with sides a, b and c is righ...

casi 3 años ago

Solved

Find the longest sequence of 1's in a binary sequence.
Given a string such as s = '011110010000000100010111' find the length of the longest string of consecutive 1's. In this examp...

casi 3 años ago

Solved

Bullseye Matrix
Given n (always odd), return output a that has concentric rings of the numbers 1 through (n+1)/2 around the center point. Exampl...

casi 3 años ago

Solved

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 ...

casi 3 años ago