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# Rafael Hernandez-Walls

Last seen: 7 giorni fa Attivo dal 2010

Followers: 0   Following: 0

My interest is everything related to numerical schemes applied to PDE and Oceanography, UABC.

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Count consecutive 0's in between values of 1
So you have some vector that contains 1's and 0's, and the goal is to return a vector that gives the number of 0's between each ...

2 mesi fa

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Molar Air Density from Temperature and Pressure
The molar density of air can be found from the Temperature and Pressure using the ideal gas law. where the Molar density STP ...

oltre un anno fa

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Calculate Wind Chill Factor
The NWS Wind Chill Temperature (WCT) index formula for calculating the dangers from winter winds and freezing temperatures: Cal...

oltre un anno fa

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Air Mass to Star for an Observer at Mean Sea Level
Air mass is a measure of how much atmosphere light from a source above the atmosphere (eg sun, planet, star) has to travel throu...

oltre un anno fa

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Find Air Temperature from Cricket Stridulation Rate
Stridulation is the process that creates a cricket's “chirp” by rubbing their wings or legs. According to the Old Farmer's Alma...

oltre un anno fa

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Construyendo matrices parte 2
Construye la siguiente matriz a partir de otros tres vectores/matrices. [ 1 8 15 3 3 3 3 2 9 16 3 3...

oltre un anno fa

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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?

oltre un anno fa

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Back to basics 22 - Rotate a matrix
Covering some basic topics I haven't seen elsewhere on Cody. Rotate the input matrix 90 degrees counterclockwise (e.g. [1 2; ...

oltre un anno fa

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Composite Trapezoidal Rule for Numeric Integration
Use the trapezoidal rule to numerically integrate a function, _f(x)_, passed as the first argument, between upper and lower limi...

oltre un anno fa

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Differential equations I
Given a function handle |f| an initial condition |y0| and a final time |tf|, solve numerically the differential equation dy...

oltre un anno fa

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Weighted Convolution
Given two input vectors x = [x_1, x_2, ..., x_K] and y = [y_1, y_2, ..., y_K] of equal length, compute the weighted convolution ...

quasi 2 anni fa

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The Piggy Bank Problem
Given a cylindrical piggy bank with radius g and height y, return the bank's volume. [ g is first input argument.] Bonus though...

oltre 2 anni fa

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mathematics , probability problem
How many different result can we have, rolling k dice?

oltre 2 anni fa

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MATLAB Basics: Complex Conjugates
For a given complex number, x, return the complex conjugate, y.

oltre 2 anni fa

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MATLAB Basics: Complex Numbers
For a given complex number, x, return the real and imaginary parts as a vector, y = [Real Imaginary].

oltre 2 anni fa

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Flip coins

oltre 2 anni fa

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Normalizing a vector

oltre 2 anni fa

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Return fibonacci sequence do not use loop and condition
Calculate the nth Fibonacci number. Given n, return f where f = fib(n) and f(1) = 1, f(2) = 1, f(3) = 2, ... Examples: ...

oltre 2 anni fa

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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...

oltre 2 anni fa

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Find the next Fibonacci number
In the sequence of Fibonacci numbers, every number is the sum of the two preceding ones: 1, 1, 2, 3, 5, 8, 13, 21, 34, 55...

oltre 2 anni fa

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Mass Conversion 1

oltre 2 anni fa

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Mass Conversion 2

oltre 3 anni fa

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Calculate the answer to life the universe and everything
<https://en.wikipedia.org/wiki/42_(number)>

oltre 3 anni fa

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How many hours are there in a day in Italy?
Remember "European Summer Time"

oltre 3 anni fa

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Temperature Conversion 3

oltre 3 anni fa

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Temperature Conversion 2

oltre 3 anni fa

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Temperature Conversion 1

oltre 3 anni fa

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Simpsons's rule (but not Homer Simpson)
I wonder what Homer Simpson would have thought of Simpson's rule? Somehow I doubt his thoughts would have included the phrase Ne...

oltre 3 anni fa

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Total energy

oltre 3 anni fa

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Potential energy calculation

oltre 3 anni fa