Community Profile # Lincoln Poon

Last seen: Today Active since 2020

A university student working his way through programming.

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Draw a x-by-x matrix 'Denmark flag'(Euro(2020)
Draw a x-by-x matrix 'Denmark flag' using '4' and '1'.(x is odd and bigger than 4) Number 4: Caption S.Kjær and number 1: K.S...

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Draw matrix 'Swiss flag'( Euro 2020)
Draw a x-by-x matrix 'Swiss flag' using '1' and 0.(x is odd and bigger than 4) Example x=5 ans = [1 1 1 1 ...

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Surface Fit z(x,y)
Given three vectors x,y,z. Find four coefficients c = [cxx cxy cyy c00], such that z = cxx*x.^2+cxy*x.*y+cyy*y.^2+c00. For e...

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GJam March 2016 IOW: Polynesiaglot Small
This Challenge is derived from <http://code.google.com/codejam/contest/8274486/dashboard#s=p2 GJam March 2016 Annual I/O for Pol...

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Gallery function, learning
write a Function, edit something or Add something that give us like the following for random n: n=2 ans= [ 0 1 ...

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Where's Waldo?
Find the string 'Waldo' in the character matrix given and return the indices of where you found him as a 4x2 matrix where the el...

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Minimum jumps to reach end of the array
Given an array of integers where each element represents the max number of steps that can be made forward from that element. Ste...

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List the households affected by leaks in water distribution
Consider the following water distribution network, where water is pumped uni-directionally from left to right: 8...

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Crossing to Kissing - Untangle the Lines
Turn lines that cross into lines that kiss. You will be given two lines that cross at some point. Your job is to untangle the...

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Geometry: Find Circle given 3 Non-Colinear Points
*This Challenge is to determine the center and radius of a circle given three non-colinear points.* *Input:* Points *Outpu...

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Opposite point of the earth, what is the antipodal of a point ?
Given two strings(lat and long) that represent the geographic coordinates of a point in the earth, you have to find out what is ...

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Given a base n, find the y values less or equal than 100(without 1), such that they will never produce a periodic number if we divide any whole number between some of them
A periodic number depends on the base b where we are working. So, for example the number 2/3 in decimal base is periodic(0.666...

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Get the variable value from a string and generate sum
Get the variable value from a string. Example. x = 'A=10' y = 'B=20' Result = (x+y) Result = 30

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CowBoy
A group of cowboys standing in circle form. They have one gun. The first cowboy shoot the cowboy beside him (second one) and giv...

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jogging?
Imagine x-y coordinate system and you are at the origin and your partner is on the x-axis at some small distance (d) away from y...

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How many palindromes?
* Given a set of letters, count all possible palindromes, using all of those letters. * For example, if the set is {'A' 'A' 'A'...

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Parsing Expressions - Binary Arithmetic Operators I
Parse and evaluate expressions like these: '1 + 2' '51 - 78' '42 * 9' The only operators are +, -, *. Both argu...

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X O X O
On a noughts and crosses board, how many possible unique combinations are there given a square grid of length n? Assumptions/...

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Cell Operator *
Please implement operator * for cell: >> {2,3} * 2 ans = 1×4 cell array     >> {2,3} * [2 3]...

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create a function that give us like the following
x=3 y= [1 -1 -1 0 1 -1 0 0 1]; -------------------------------- x=5 y= [ 1 -1 -...

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Balanced Ternary Numbers: Easy as |, |-, |o
This problem concerns the so-called <http://en.wikipedia.org/wiki/Balanced_ternary balanced ternary> system for representing num...

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Penny Distribution Machine
A machine consists of a row of boxes. To start, one places N pennies in the leftmost box. The machine then redistributes the pen...

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possible ways through matrix
This problem is inspired from problem 2405 <https://www.mathworks.com/matlabcentral/cody/problems/2405-the-number-of-ways>. C...

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The Number of Ways
Find all the possible ways to reach the end of a matrix. So given [a b c d] the possible ways [a c],[a d],[b c],[b ...

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Repopulate the City
For any population p of positive integers between pmin and pmax, we can calculate histogram count n for a list of evenly dividin...

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compare strings
Given 2 strings and 3 actions (Insert,delete,replace) on characters. Find the difference between two strings. Example: str...

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Create Combination
Motivation: In many problems, we need to create combinations with the function nchoosek. In some cases, however, choices are lim...

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Get ranking of a combination looking for speed.
I have the numbers pulled without replacement from the set [1 2 3 4 5 6 7 8 9 10 11 12 13]; They are then ordered from least to...