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# Tim

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1,373 total contributions since 2012

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Calculate triangle area
Imagine that you want to calculate the areas of some triangles given in matrix form. First the coordinates of the vertices of th...

1 day ago

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Find the centroid of triangle
Imagine that you want to calculate the *centroid* of some _triangles_ given in matrix form. First the coordinates of the vertice...

2 days ago

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Fangs of pseudo-vampire number
given a number, find all the fangs of that number. A pseudo-vampire number can have multiple of fangs. The output should be a...

2 days ago

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Pseudo-vampire number
refer to <https://en.wikipedia.org/wiki/Vampire_number> Given a number x, determine whether it is a pseudo-vampire number. ...

2 days ago

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Zero
given an integer a, find the smallest possible integer b(b>0) such that their bitwise logical AND is zero. * if a=11(1011) t...

7 days ago

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Projector Matrix
Write a function to determine whether or not the matrix is a projector. Projector matrices are defined as P^2 = P.

14 days ago

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Nilpotent matrix
Check if matrix A is <http://mathworks.com/ nilpotent>.

14 days ago

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Outer product of multiple vectors
In tensor algebra, it is often useful to define a tensor as a product of lower order tensors. Similarly, a multidimensional arra...

14 days ago

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Combined Ages 4 - Non-symmetric with multiples, n ≥ 3
This problem is slightly more difficult than <http://www.mathworks.com/matlabcentral/cody/problems/42383-combined-ages-3-non-sym...

14 days ago

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Alternate list of elements
Write a function that combines two lists by alternating the elements, e.g. ['a','b','c'], ['1','2','3'] → 'a1b2c3'.

15 days ago

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Frugal number
check whether n is a frugal number * a frugal number is a natural number in a given number base that has more digits than the...

15 days ago

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Last non-zero digit
Given a number n, find the last non-zero digit of the factorial of that number. You need to take care of the large values of n....

16 days ago

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This problem is <https://www.mathworks.com/matlabcentral/cody/problems/45252 Restricted Addition v1> with more restrictions. ...

16 days ago

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Find the sequence
Find the nth number of a sequence. Check the test suite to determine the sequence. * hint: it is closely related to familiar ...

16 days ago

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Pell numbers
Find the nth pell number <https://en.wikipedia.org/wiki/Pell_number>

16 days ago

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Add two numbers without use of common arithmetic operations. Unfortunately, in order to enforce this restriction, other restrict...

17 days ago

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Tribonacci Sequence
Generate the tribonacci sequence upto n

17 days ago

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String count
given a string 'str', count the number of the followings - * letters * digits * white space * capital letters * smal...

24 days ago

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A secret can be told only to 2 persons in 5 minutes. Now these 2 more persons can spread the secret to 4 other people. this way ...

24 days ago

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Aquiles y la tortuga
Contaba Zenón en su famosa paradoja que un día Aquiles, el guerrero griego más veloz de la Hélade, se enfrentó a una pequeña tor...

25 days ago

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Count digits
Count total number of digits from 1 to n. * n=13 * output=17 since from [1-9] total 9 digits.[10-13] total 4*2=8 digits.

27 days ago

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Linear system of equations
Solve the system of equations in three variables.

1 month ago

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String to Binary Representation
Given a string, convert it using UTF-8 into a binary array where each character or byte is arraigned low to high. For example: ...

1 month ago

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Binary Array to Hex Representation
Given a binary array of bytes (lsb to msb), convert it into a hexadecimal representation (msb to lsb). For example: Input: [1 ...

1 month ago

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How many Christmas presents under the tree?
For many families at Christmas, each family member gives 1 present to every other family member. The main exception is that chil...

1 month ago

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Check if number is a square number
Test if integer i is a square number. Return logical true if it is.

1 month ago

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Calculate Euler's phi function

1 month ago

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An Ohm's Law Calculator
*BACKGROUND / MOTIVATION:* Many important observations in math and science can be described by short, but powerful, equations...

1 month ago

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Generate Golomb's sequence
Generate Golomb's sequence up to the given number. If n=4, then seq = [1, 2, 2, 3, 3, 4, 4, 4] If n=6, then s...

1 month ago

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generate the matrix
given 3 inputs e.g [2,3,4] -- generate a matrix like below -- [2 2 0 0 0 0 0 0 0; 2 2 0 0 0 0 0 0 0; 0 0 3 3 3 0 0 0 0; 0 0...

1 month ago