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Hooman


134 total contributions since 2012

Professional Interests: MATLAB - statistics - modeling

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5 Prime Numbers
Your function will be given lower and upper integer bounds. Your task is to return a vector containing the first five prime numb...

1년 이상 ago

Solved


Pernicious Anniversary Problem
Since Cody is 5 years old, it's pernicious. A <http://rosettacode.org/wiki/Pernicious_numbers Pernicious number> is an integer w...

1년 이상 ago

Solved


How to subtract?
*&plusmn &plusmn &plusmn &plusmn &plusmn &plusmn &plusmn &plusmn &plusmn &plusmn &plusmn* * Imagine you need to subtract one...

1년 이상 ago

Solved


Flip the main diagonal of a matrix
Given a n x n matrix, M, flip its main diagonal. Example: >> M=magic(5); >> flipDiagonal(M) 9 24 1 ...

1년 이상 ago

Solved


Subset Sum
Given a vector v of integers and an integer n, return the the indices of v (as a row vector in ascending order) that sum to n. I...

약 3년 ago

Solved


Trimming Spaces
Given a string, remove all leading and trailing spaces (where space is defined as ASCII 32). Input a = ' singular value deco...

약 3년 ago

Solved


Stuff the Board
You have a stack of tiles to put onto an array-like playing board. Each tile has a number (always an integer), and the board var...

약 5년 ago

Solved


Read a Soroban Abacus
*Description* The Soroban is the name of the modern Japanese abacus. Information on reading a Soroban can be found <http://we...

약 5년 ago

Solved


Back to basics 21 - Matrix replicating
Covering some basic topics I haven't seen elsewhere on Cody. Given an input matrix, generate an output matrix that consists o...

5년 이상 ago

Solved


Compute a dot product of two vectors x and y
x and y are input vectors, d is a number and contains their dot product

5년 이상 ago

Solved


Create a row array using double colon operator
Create a row array from 9 to 1, using the double colon operator.

5년 이상 ago

Solved


Fahrenheit to Celsius using multiple statements
Given a Fahrenheit value F, convert to a Celsius value C. While the equation is C = 5/9 * (F - 32), as an exercise use two state...

5년 이상 ago

Solved


Circle area using pi
Given a circle's radius, compute the circle's area. Use the built-in mathematical constant pi.

5년 이상 ago

Solved


Simple equation: Annual salary
Given an hourly wage, compute an annual salary by multiplying the wage times 40 and times 50, because salary = wage x 40 hours/w...

5년 이상 ago

Solved


Find the "ordinary" or Euclidean distance between A and Z
A, B and Z define three points in the 3D _Euclidean_ space of the form: A = [x1;y1;0]; B = [x2;y2;0]; Z = [x2;y2;z]; Find th...

6년 이하 ago

Solved


Test for balanced parentheses
Given the input inStr, give the boolean output out indicating whether all the parentheses are balanced. Examples: * If ...

6년 이하 ago

Solved


Count decimal digits of a number
* Given an integer number you have to return the number of its digits. * For example 248 has 3 digits and 1589 has 4 digits ...

6년 이하 ago

Solved


give nth decimal place of pi
max 15th place after the decimal point is ok for now

6년 이하 ago

Solved


Determine Whether an array is empty
Input a matrix x, output y is TRUE if x is empty, otherwise FALSE.

6년 이하 ago

Solved


Convert a vector into a number
This is a sub problem related to this problem: <http://www.mathworks.com/matlabcentral/cody/problems/621-cryptomath-addition>...

6년 이하 ago

Solved


Given a window, how many subsets of a vector sum positive
Given a vector: [1 0 -1 3 2 -3 1] and a window of 2, A sliding window would find: 1 + 0 = 1 0 - 1 = -1 ...

6년 이하 ago

Solved


Duplicate each element of a vector.
for an n-dimensional vector x, the function should return another vector 2n-dimension which each element is repeated twice. Ex...

6년 이하 ago

Solved


Implement a ROT13 cipher
Replace each character in string s1 with the character that is shifted 13 positions from it (wrap back to the beginning if neces...

6년 이하 ago

Solved


Get the length of a given vector
Given a vector x, the output y should equal the length of x.

6년 이하 ago

Solved


Getting the indices from a vector
This is a basic MATLAB operation. It is for instructional purposes. --- You may already know how to <http://www.mathworks....

6년 이하 ago

Solved


Interpolator
You have a two vectors, a and b. They are monotonic and the same length. Given a value, va, where va is between a(1) and a(end...

6년 이하 ago

Solved


Check if number exists in vector
Return 1 if number _a_ exists in vector _b_ otherwise return 0. a = 3; b = [1,2,4]; Returns 0. a = 3; b = [1,...

6년 이하 ago

Solved


surface of a spherical planet
you just discovered its circumference, that is the input.

6년 이하 ago

Solved


Making change
Given an amount of currency, return a vector of this form: [100 50 20 10 5 2 1 0.5 0.25 0.1 0.05 0.01] Example: Input a = ...

6년 이하 ago

Solved


Quote Doubler
Given a string s1, find all occurrences of the single quote character and replace them with two occurrences of the single quote ...

6년 이하 ago

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