Solved

Unusual Concatenations
The sum of the squares of certain unusual integers is equal to the concatenation of their individual digits. For example: ...

8 months 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...

8 months ago

Solved

You never ask a lady her age
Instead you ask her to multiply her age by 10, then subtract any of the first nine multiples of 9 (9,18,...,81), and tell you th...

8 months ago

Solved

Count of Unique Elements of a Vector
Count the number of times each unique element appears in a vector. Example: Input x = [2 9 1 2 4 9 2] Output y = [1 1; 2 3; 4...

8 months ago

Solved

struct2values()
Convert a struct object into a column vector. You can assume that the struct elements are scalars Example: a = struct();...

8 months ago

Solved

Reepeating numbers in array
Repeating numbers in array In = [1 0 0 0 2 0 0 0 3 0 0 0 0 0 5 0 0 0 0]. Out = [1 1 1 1 2 2 2 2 3 3 3 3 3 3 5 5 5 5 5].

8 months 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...

8 months ago

Solved

Splitting Triangle - Problem the second

8 months ago

Solved

Splitting Hexagon - Problem the second

8 months ago

Solved

Splitting Hexagon - Problem the first

8 months ago

Solved

Splitting Square - Problem the second

8 months ago

Solved

Splitting Square - Problem the third

8 months ago

Solved

Distance of the centroids of the balls
Given *n* balls of radius *r* and the vector *p (nx3)* with all position *(x,y,z)* of the balls, return the symmetric matrix *A ...

8 months ago

Solved

Coefficient of Static friction
The coefficient of static friction between two surfaces is u. What force must be used to move a W lb. crate on a horizontal sur...

8 months ago

Solved

Calculate the height of an object dropped from the sky
Assume that an object is dropped from 1000 meters above the surface of the earth at time t=0. The object is dropped such that t...

8 months ago

Solved

Find the coefficients for numerical integration using Simpson's rule
For using numerical integration using Simpson's rule, we need some coefficients to be determined first. Suppose the n is the nu...

8 months ago

Solved

Sums of cubes and squares of sums
Given the positive integers 1:n, can you: 1. Compute twice the sum of the cubes of those numbers. 2. Subtract the square...

8 months ago

Solved

Moore-Penrose pseudoinverse of matrix
Find the command for Moore-Penrose pseudoinverse of matrix and solve

8 months ago

Solved

When the sum of the cubes is a quartic...

8 months ago

Solved

Length of shortest path in a directed graph.
Given a directed graph and a start and end node in the graph, return the minimum number of hops required to reach the end node f...

8 months ago

Solved

A little bit of luck needed
This one may require a little bit of guess work, but it is possible. Hints: - The same solution might fail the tests once and ...

8 months ago

Solved

Splitting Triangle - Problem the first

8 months ago

Solved

Concatenated Consecutive Prime

8 months ago

Solved

remove nans fast
There are several ways to locate and remove nans in a matrix, and return an 1d row vector. In this problem the challenge is ...

8 months ago

Solved

Greater than before
Given an array of integers, write a function that returns elements that are greater than the one before them. For instance, ...

8 months ago

Solved

What kind of triangle?
Write a function named check_triangle that receives three positive integers as input: a, b, and c. These three numbers are inte...

9 months ago

Solved

Unique rows
A matrix is given as the input. Remove any duplicate rows from the matrix. keep the first occurrence.

9 months ago

Solved

add num
add two numbers a and b

9 months ago

Solved

Modulo with 5

9 months ago

Solved

Sum of infinite series.

9 months ago