Solved

Fill a zeros matrix (★★★★★)

(Copy of Problem 830) The aim is to fill an array of all zeros given a numerical value and the index of row and columns for t...

2 years ago

Solved

Extract leading non-zero digit (★★★★★)

(Copy of Problem 47) Benford's Law states that the distribution of leading digits is not random. This is probably because man...

2 years ago

Solved

Variance computation (★★★)

Given a vector x with several values, compute the variance, whose formula is given by: <<https://i.imgur.com/Wg95KBE.gif>> ...

2 years ago

Solved

Generate a vector which contains a pyramid pattern (★★★★)

Generate a vector that contains terms that follows a pyramid pattern up to the nth row: 1 2 2 3 3 3 4 4 4 4 ...

2 years ago

Solved

Get the elements of diagonal and antidiagonal for any m-by-n matrix (★★★★)

(copy of prob. 859) In this problem you must submit a solution which returns the diagonal and anti-diagonal elements without ...

2 years ago

Solved

Create times-tables (★★★)

(copy of prob 33) At one time or another, we all had to memorize boring times tables. 5 times 5 is 25. 5 times 6 is 30. 12 ti...

2 years ago

Solved

PEMDAS test (★★)

Create the function that will return the following expression for x and y. <<https://i.ibb.co/RHWyzrv/Code-Cogs-Eqn-1.gif>> ...

2 years ago

Solved

Approximate functions 1 (★★★)

Compute the following sum for any given x and positive integer n. <<https://i.imgur.com/eUwXdSE.gif>> <> Here m! denote...

2 years ago

Solved

Mo money, mo math 1! (★★★)

(adapted from Prob 9 Cody team) You have a vector where the elements represent the number of $20 bills, $10 bills, $5 bills, ...

2 years ago

Solved

Remove the row average (★★★)

(copy of Prob. 963) Given a 2-d matrix, remove the row average from each row. Your solution MUST be vectorized. The solut...

2 years ago

Solved

Replicate elements in vectors (★★★)

(copy of Prob 867) Replicate each element of a row vector (with NaN) a constant number of times. Examples n=2, A=[1 2...

2 years ago

Solved

Vector of digits (★★)

Given a positive integer x, construct a vector y with all the digits of x in the order of appearance in x. Thus, if x = 172...

2 years ago

Solved

Median computation (★★★)

See easy edition of this problem. However, now you must compute the median of any real-valued vector without using the in-built...

2 years ago

Solved

Triangle Numbers (★★)

(copy of problem 5) Triangle numbers are the sums of successive integers. So 6 is a triangle number because 6 = 1 + 2 + 3...

2 years ago

Solved

Generate n equally spaced "intervals" between -x and x (★)

Given n and x, return a list of numbers (in ascending order) that divides the interval [-x x] into n equal-length intervals. ...

2 years ago

Solved

Column Removal (★★★)

(copy of prob 7) Remove the nth column from input matrix A and return the resulting matrix in output B. So if A = [1 2...

2 years ago

Solved

Mo money, mo math #2! (★★★)

(adapted from Prob 9 Cody team) You have a matrix for which each row is a person and the columns represent the number of quar...

2 years ago

Solved

Magnitude of a vector (★★★)

Given a vector x with values [ x1, x2, x3, ..., xn ], compute the magnitude (or length) of the vector which is given by <<htt...

2 years ago

Solved

Matrix indexing with two vectors of indices (★★)

(copy of Prob 589) Given a matrix M and two index vectors a and b, return a row vector x where x(i) = M(a(i),b(i)). Thus, if...

2 years ago

Solved

Doubling elements in a vector (★★)

(copy of prob. 1024) Given the vector A, return B in which all numbers in A are doubling. So for: A = [ 1 5 8 ] t...

2 years ago

Solved

Reindex a vector (★★)

(copy of Prob. 676) You are given two vectors of equal length. Vector N has numeric values (no Inf or NaN) while vector IDX h...

2 years ago

Solved

Average of corner elements of a matrix (★★)

(copy of prob 2235) Calculate the average of corner elements of a matrix. e.g. x=[1 2 3; 4 5 6; 7 8 9;] avg = (1+3+7+9)...

2 years ago

Solved

Element-wise vector product (★)

Given two vectors x and y, compute their element-wise product z. Thus, if x = [1 3 5] and y = [0.5 -1 2], then z = [1*0.5...

2 years ago

Solved

Sum of terms in a series 1 (★★★)

Given x and n, compute the following sum: |x|+|x|^(1/2)+|x|^(1/3)+|x|^(1/4)+|x|^(1/5) ... + |x|^(1/n) where ||x|| indica...

2 years ago

Solved

Median computation (★)

Given a vector of values, compute the median. The median is defined as the middle value in a set of *sorted* data. Thus, if ...

2 years ago

Solved

Create logarithmically spaced values (★)

Given three numbers a,b,n with b>a, create a vector y with n logarithmic spaced values between 10^a and 10^b. Thus, if a = -2, ...

2 years ago

Solved

Create a vector of the first n natural numbers (★)

If n = 7, your program should return a vector y, where y = [1 2 3 4 5 6 7].

2 years ago

Solved

Variance computation (★)

Given a vector x with several values, compute the variance, whose formula is given by: <<https://i.imgur.com/Wg95KBE.gif>> ...

2 years ago

Solved

Prime number check (★★)

One way to see if a number x is prime is to compute the remainders obtained when dividing x by all integers from 2 to √(x). If x...

2 years ago

Solved

Swap the first and last columns (★★)

(copy of Prob 19) Flip the outermost columns of matrix A, so that the first column becomes the last and the last column becom...

2 years ago