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# David Verrelli

Last seen: 9 meses hace Con actividad desde 2015

http://www.research.div1.com.au/
Highest Cody ranking = 42nd (10000 points, in July 2018).

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Wait a second!
Your code needs to take 'exactly' one second to run — accurate to ±0.5 milliseconds. The input will be the number of millis...

10 meses hace

Resuelto

N-Dimensional Array Slice
Given an N-dimensional array, _A_, an index, _I_, and a dimension, _d_, return the _I_ th elements of _A_ in the _d_ dimension. ...

más de 1 año hace

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Operate on matrices of unequal, yet similar, size
You may want to add a vector to a matrix, implying that the vector is added to each column of the matrix. Or multiply a 3x4x5 ma...

más de 1 año hace

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Comparison of floating-point numbers (singles)
Floating-point numbers cannot generally be represented exactly, so it is usually inappropriate to test for 'equality' between tw...

más de 1 año hace

Problema

Guess the number I'm thinking of (Part 2)
Have you tried the original "Guess the number I'm thinking of" (Problem 44630)? This problem is just like that, except that the...

más de 1 año hace | 1 | 4 solvers

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What score did they give?

más de 3 años hace

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Combine the first and last names
MATLAB R2016 provides a rich set of functions to work with string arrays. In this problem, you will be given two string arrays o...

alrededor de 4 años hace

Problema

What score did they give?

más de 4 años hace | 1 | 8 solvers

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Create tangent function out of sin and cos

más de 4 años hace

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How to Concatenate two strings?
How to Concatenate two strings?

más de 4 años hace

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Create a function without inputs that adds one to the output every time it is called. A different possibility of solving this ha...

más de 4 años hace

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Calculate correlation.
There are two data. y1=[0 1 2 3 4]' y2=[2 3 4 5 6]' We can see positive relationship between y1 and y2. The relations...

más de 4 años hace

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Implement zero-based indexing for Matrices
Given an input vector and position (which is zero based) output the value Example: x = [1 2; 4 5] pos = [0 1] value = 5 ...

más de 4 años hace

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Make roundn function
Make roundn function using round. x=0.55555 y=function(x,1) y=1 y=function(x,2) y=0.6 y=function(x,3) ...

más de 4 años hace

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Replace x value into y value in string text.
Replace x value into y value in string text. Example text='Hello World' x='World', y='Universe' result='Hello Universe'.

más de 4 años hace

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Analyze observation data
Suppose you have the following data (A,B,C) in three-column format. A B C -------------------------- t=1 ...

más de 4 años hace

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Probabilities - Balls and urns - 02
The urn contains B blue balls and R red balls. Each trial consists of drawing one random ball from the urn and observing its col...

más de 4 años hace

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Solve equation numerically
y'=y In order to solve equation using computer, numerical analysis are needed. 1st order Euler's method is one of the metho...

más de 4 años hace

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Get Cody's screen size
Return an object that helps this problem's test suite return Cody's screen size.

más de 4 años hace

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Create a function that subtracts a from b if a and b are integers and adds them if they are floats.

más de 4 años hace

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Circumscribed Pentagon?
Building off of <https://www.mathworks.com/matlabcentral/cody/problems/44368 Problem 44368>, your function will be provided with...

más de 4 años hace

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Calculate numerical integration.
x=0:0.01:1 y=@(x)x.^2 Using given two inputs(x and y), conduct numerical integration in x. (hint: trapz)

más de 4 años hace

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Tridiagonal matrix
Given vectors u and v, make a tri-diagonal symmetric matrix such that u is in the main diagonal and v is below and above diagona...

más de 4 años hace

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Calculate area of sector
A=function(r,seta) r is radius of sector, seta is angle of sector, and A is its area. Area of sector A is defined as 0.5*(r^2...

más de 4 años hace

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Given square matrix, and solution vector, find the values of the variables Example: xyz = [1 -1 2; 0 2 5; 4 0 -3]; //x-y+2...

más de 4 años hace

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Solve the system of linear equations
4x - 2y +6z=8 2x + 8y +2z=4 6x + 10y +3z=0 Input is each coefficient of polynomial. For example, a=[4 ...

más de 4 años hace

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Count given word x in text.
Count how many times given word x repeats in text.

más de 4 años hace

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Save variables
a=[1] Save variable a that is located in workspace into current folder. File name should be 'a.mat'

más de 4 años hace

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Integrate Me
Given polynomial, output the integral (with k = 1 for simplicity purposes) Example: input = [2 1] % 2x+1 output = [1 1 1]...

más de 4 años hace

Resuelto

Modified Upper Matrix Mock
Given a vector v=[1 3 6 9 11], turn it into a matrix 'ramp' like so: m=[1 3 6 9 11; 0 3 6 9 11; 0 0 6 9 11; 0 0 0 9 11; 0 0 0...

más de 4 años hace