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# Rafael Hernandez-Walls

##### Last seen: 3 días ago
1.211 total contributions since 2010

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

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Times 10
Try out this test problem first. Given the variable x as your input, multiply it by ten and put the result in y. Examples:...

8 días ago

Solved

Find the mean of a 2-D matrix after excluding elements of specified sub-matrix
You need to find the mean of a 2-D matrix after excluding elements which form an inner sub-matrix. e.g. If the input 2-D matrix ...

8 días ago

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Perimeter of a square!
Calculate the circumference of the square whose side is n

9 días ago

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Find my daddy long leg (No 's')
Given the ratio of the two legs (longer / shorter), and the hypotenuse length, find the value of the bigger leg.

9 días ago

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Get the area of ​​the square.
Four circles are inscribed in the square ABCD. The perimeter of each circle is *aπ*. <<http://imgfz.com/i/UzgCJut.png>> Gi...

15 días ago

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Find the area of ​​the square
There are *n²* circles inscribed in the square ABCD. The perimeter of each circle is *aπ* <<http://imgfz.com/i/3wzCeAT.png>> ...

15 días ago

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Spiral Out - 01
Create a spiral matrix ( clock-wise direction ) of size n. Try to do that without using the built-in function.

17 días ago

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Compute the missing quantity among P, V, T for an ideal gas
Consider 100 mol of helium gas at a certain pressure (P), volume (V), and temperature (T). Assuming that the ideal gas law appli...

18 días ago

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Equilateral Triangle
The length of one side of the equilateral triangle is a. Calculate the area of ​​the equilateral triangle.

18 días ago

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Newton's Motion Law
F is force, m is mass, and a is acceleration. Calculate the force for an object.

18 días ago

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Momentum of an Object
P is momentum, m is mass, and v is velocity. Calculate the momentum for an object.

18 días ago

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Matrix problem for beginners
Make a matrix [0,0,0;1,1,1;2,2,2]. X=[0,1,2]

18 días ago

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Matrix for beginners
Multiply x and y elemwise.

18 días ago

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Divide pi
Divide pi by x!

18 días ago

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Multiply pi
Multiply pi with x!

18 días ago

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El concepto de pendiente o inclinación de una función recta es muy intuitivo para cualquier persona. Desde el punto de vista mat...

22 días ago

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¿Es una función exponencial?
Crea una función que permita analizar si los datos dados por el usuario ( *x* e *y*) se relacionan por medio de una función expo...

22 días ago

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Find the maximum number of decimal places in a set of numbers
Given a vector or matrix of values, calculate the maximum number of decimal places within the input. Trailing zeros do not coun...

26 días ago

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Find 0 in array
Given array find where there 0 is.

26 días ago

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MATLAB Basic: rounding III

26 días ago

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Determina el número de cifras de un número
Crea una función que te devuelva el número de cifras de un número. Algunos ejemplos para ayudarte serían: El número 125 tie...

27 días ago

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Determina si el número es primo
Primero, antes que nada: ¿Qué es un número primo? Un número primo es cualquier número que solamente se puede dividir por 1 y ...

27 días ago

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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)

27 días ago

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factorial
calculate x!

27 días ago

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Sum Sum Sum!
Calculate the sum of the natural numbers from 1 to n

27 días ago

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Sum sum!!!
Sum the numbers from 1 to n

27 días ago

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Find the coefficients for numerical integration using Simpson's rule
For using numerical integration using Simpson's rule, we need some coefficients to be determined first. Suppose the n is the nu...

27 días ago

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¿Es una parábola?
Dados los datos de las magnitudes _*x*_ e _*y*_, crear una función que permita conocer si se trata de una parábola o no, indican...

27 días ago

Solved

Calculate Engine Power
Calculate Engine Power (P) in kW given the values of Torque(M) in Nm and Engine Speed(n) in rpm

27 días ago

Solved

The answer to life the universe and everything
Write a function that gives the answer to life the universe and everything to every input except the input is 42. In this case t...

27 días ago