David Hill

Last seen: Today | Active since 2017

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Electrical Engineering with minors in Computer Science, Mathematics, and Creative Writing.

Working as Undergraduate Research Assistant in the field of Computational Photonics

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why doesnt it work
function x = ss_dtmf(number,dt,nd,np) x=[]; for i=1:length(number) x = [x,ss_dtmf1(number(i),0:nd:dt),ss_dtmf1(12,0:np:dt...

alrededor de 11 horas ago | 0

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Split a vector into 2 oscillating vectors?
v1=zeros(1,500000); v2=zeros(1,500000); for k=1:100 v1((k-1)*5000+1:k*5000)=v((2*(k-1))*5000+1:(2*(k-1)+1)*5000); v2((k-...

alrededor de 12 horas ago | 0

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count upper and lower case characters
In a given input string, count and return the number of upper and lower case characters as u and l respectively. For example:...

alrededor de 14 horas ago

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convert the number to binary format & count digits
Convert the given number to the corresponding binary format and count the number of digits in that binary number

alrededor de 14 horas ago

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Basic Quadratic Equation
Create the equation: y=(3x)^2+(5x)+35 and compute y for various values of x

alrededor de 14 horas ago

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Raise each element to the power of its index in a matrix
In a matrix, A = [1,2;3,4] raise the power of each element like: 1^1+2^3+3^2+4^4 and add it all to produce the result 274

alrededor de 14 horas ago

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Percentage of zeros in a matrix of only 1s and 0s
Write a function called _zero_stat_ that takes a matrix as an input that only has 0 and 1 elements. The function needs to comput...

alrededor de 14 horas ago

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Nth root of a number
Given an input and a number N, find the Nth root of the number(s)

alrededor de 14 horas ago

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Check if there are white spaces in the input string
If there are white spaces in the input string, output=1 else 0

alrededor de 14 horas ago

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function to compute root mean square of first nn positive odd integers
Write a function called odd_rms that returns orms, which is the square root of the mean of the squares of the first nn positive ...

alrededor de 14 horas ago

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short or buy ? take the opportunity
you had already calculated a theoretical stock value, now you checked in bloomberg the quoted price of that stock and you have t...

alrededor de 16 horas ago

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Jack's hand in "Titanic" ♤
Given a series of cards, return true if it's the famous hand. Note that i pretend that poker cards goes from 1 to 10 so be care...

alrededor de 16 horas ago

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Portfolio diversification: choose your stocks !
we have the returns of 3 stocks for the last 4 years and we have to combine only 2 stocks that are less correlated. Example: st...

alrededor de 16 horas ago

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basic finance application
i watch bloomberg everyday and i want to estimate a stock price stability, so i have to calculate the momentum & the rate of cha...

alrededor de 17 horas ago

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continuous compounding
what's the present value of having 100 dollars after n years given a continuously compounded rate i ? keep only 2 decimals pleas...

alrededor de 17 horas ago

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Matrix to vector transformation
given a matrix, make in the output 1 column vector putting odd numbers in ascending order after that put the even numbers in des...

alrededor de 17 horas ago

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remove every row&col for every nan
for a given matrix, remove the row and column of every nan. Example x=[1 2 NaN 4 5 6 7 8 ...

alrededor de 17 horas ago

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what's my tax amount this year ?
given an annual salary x and a tax rate i calculate the amount that you have to pay.Example x = 70000; i=.10 y_correc...

alrededor de 17 horas ago

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List the dopey numbers
If vile numbers have binary representations that end with an even number of zeros (even vile), then numbers with binary represe...

1 día ago

Answered
Number of rows based on frequency of one integer and position of another integer
r=unique(matrix(:,2)); r=r(end-4:end); n=nnz(matrix(:,1)==10&ismember(matrix(:,2),r));

1 día ago | 0

Solved

Backgammon #4 - Dice Probabilities
Previous problems in this series have looked at how a backgammon board might be represented, and board positions manipulated and...

1 día ago

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List the vile numbers
Evil numbers, the subject of Cody Problem 2733 have an even number of ones in their binary representations, whereas odious numbe...

1 día ago

Solved

Basic: fft
Calculate the value using fft

2 días ago

Solved

Find Prime Numbers
Find prime numbers in a vector and return them in increasing order Example: [2 51 8 65 19] a = [19 51]

2 días ago

Solved

Matrix Pattern 6

2 días ago

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Matrix Pattern 2

2 días ago

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Easy Sequence 61: Wide Pythagorean Triangles
An integer-sided right triangle with sides , is called a "wide Pythagorean triangle", if , and . Write a program that counts a...

4 días ago

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Easy Sequences 63: Base-63 Arithmetic Functions
In this exercise we are required to implement 7 basic 'unsigned integer' arithmetic functions in base-63: to63(x) - convert...

5 días ago

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Easy Sequences 57: "Pretty-gorean" Triangles?
A positive integer is called a regular number, if and only if there exist a non-negative integer , such that . For some reason...

6 días ago

Solved

Easy Sequences 59: Almost Twin Primes
A positive integer pair , is called an "almost twin prime pair", if one of the pair is a prime and the other is either a prime o...

9 días ago

David Hill

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