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Rafael Hernandez-Walls


Last seen: Today
1,209 total contributions since 2010

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

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Solved


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

6 hours ago

Solved


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.

18 hours 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...

6 days 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>> ...

6 days ago

Solved


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

8 days 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...

9 days ago

Solved


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

10 days 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.

10 days 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.

10 days 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]

10 days ago

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Matrix for beginners
Multiply x and y elemwise.

10 days ago

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Divide pi
Divide pi by x!

10 days ago

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Multiply pi
Multiply pi with x!

10 days ago

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

14 days ago

Solved


¿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...

14 days 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...

17 days ago

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

18 days ago

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MATLAB Basic: rounding III
Do rounding towards minus infinity. Example: -8.8, answer -9 +8.1 answer 8 +8.50 answer 8

18 days 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...

18 days 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 ...

18 days 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)

18 days ago

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factorial
calculate x!

18 days ago

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

18 days ago

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

18 days 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...

19 days 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...

19 days 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

19 days 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...

19 days ago

Solved


Perimeter of a quadrilateral
There are four cars starting at a point. The first car points north, the second one points east, the third one points south, an...

19 days ago

Solved


Delete the column with all 0 !
Delete the column with all 0 data in a matrix(x). e.g. input x = 1 0 0 4 5 0 7 0 ...

19 days ago

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