# David Verrelli

Last seen: 5 Monate vor Aktiv seit 2015

Followers: 0   Following: 0

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...

mehr als 2 Jahre vor

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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. ...

fast 3 Jahre vor

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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...

fast 3 Jahre vor

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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...

fast 3 Jahre vor

Problem

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...

fast 3 Jahre vor | 1 | 4 Lösungsvorschläge

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What score did they give?

fast 5 Jahre vor

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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...

mehr als 5 Jahre vor

Problem

What score did they give?

fast 6 Jahre vor | 1 | 9 Lösungsvorschläge

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Create tangent function out of sin and cos

fast 6 Jahre vor

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

fast 6 Jahre vor

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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...

fast 6 Jahre vor

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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...

fast 6 Jahre vor

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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 ...

fast 6 Jahre vor

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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) ...

fast 6 Jahre vor

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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'.

fast 6 Jahre vor

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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 ...

fast 6 Jahre vor

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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...

fast 6 Jahre vor

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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...

fast 6 Jahre vor

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

fast 6 Jahre vor

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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.

fast 6 Jahre vor

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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...

fast 6 Jahre vor

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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)

fast 6 Jahre vor

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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...

fast 6 Jahre vor

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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...

fast 6 Jahre vor

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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...

fast 6 Jahre vor

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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 ...

fast 6 Jahre vor

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

fast 6 Jahre vor

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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'

fast 6 Jahre vor

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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]...

fast 6 Jahre vor

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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...

fast 6 Jahre vor