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swap sign sum & multiply castles
* It is an easy problem, if you know the answer. * Given a square matrix of NxN ordinary numbers. * Initially place N identi...

5 years ago

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Double the next and alternate sign

5 years ago

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3D indexes
Generalisation in 3 dimensions of the <http://nl.mathworks.com/matlabcentral/cody/problems/43117-2d-indexes Problem 43117. 2D I...

5 years ago

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2D Indexes
Given in input the maximum degree P, the algorithm furnishes a ordered list of two dimensional vectors [i,j] i,j>=0 such that i+...

5 years ago

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Produce the following matrix
Produce the following matrix x = [2 3 4] y_correct = [1 1/2 1/3; 2 1 1/4; 3 4 1];

5 years ago

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Number of paths on a grid
Consider a grid formed by n vertices vertically down, and m vertices horizontally right. Your starting point is at the top lef...

5 years ago

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Make a rainbow matrix (follow-up to checkerboard matrix)
Given an integer n, make an n-by-n matrix as shown below. The a(1,1) should be 0. As we move away from the top-left, the number ...

5 years ago

Solved

Enlarge array
Given an m-by-n numeric array (A) and a 1-by-2 vector (sz) indicating the dimensions [p q] to enlarge each element, return an (m...

5 years ago

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...

5 years ago

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Longest run of consecutive numbers (★★★★★)
(copy of Problem 672) Given a vector a, find the number(s) that is/are repeated consecutively most often. For example, if you...

5 years ago

Solved

Twins in a Window
<http://en.wikipedia.org/wiki/Twin_primes Twin primes> are prime numbers that differ by 2, such as [11,13] or [41,43]. Write a f...

5 years ago

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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...

5 years ago

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Counting Squares
An algorithm starts with a single square and on each of its next iterations adds new squares all around the outside as shown bel...

5 years ago

Solved

Converting numbers back from extended form
Thanks for all the help you guys gave me on writing out the numbers in extended form in <http://www.mathworks.com/matlabcentral/...

5 years ago

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Find the definite integral of various linear functions
A definite integral had a minimum and maximum limit. When you solve this type of problem you must use both quad and the trapz fu...

5 years ago

Problem

Cipher and Decipher the message - 3 key

5 years ago | 1 | 9 solvers

Solved

Hard limit function
Classify x data as if x>=0 then y=1 if x<0 then y=0 Example x = [ -2 -1 0 1 2] y = [ 0 0 1 1 1]

5 years ago

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Pascal's triangle
<https://en.wikipedia.org/wiki/Pascal%27s_triangle> if the order is: x = 3; the output will be: output = [0 0 0 1 0 0 ...

5 years ago

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No more zeros
Given an array with zeros at the beginning or at the end, you should get the output without these zeros: input = [zeros(5...

5 years ago

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Calculate feeling temperature before climbing a mountain
I sometimes climb a mountain. As is well known, when the altitude becomes 100 (m) higher, the temperature lowers by 0.6 degrees...

5 years ago

Solved

Delete the column with all 0 in the TABLE
In the given table (T), delete the column with all 0 data. e.g. input Banana Apple Orange Mellon __...

5 years ago

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Probability of red tulips (at both ends of a row)
I planted tulip bulbs in a row on my flower bed. I thought that I had planted white tulips all. However, later, it turned out t...

5 years ago

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Find names/words that start and end with the same letter.
Find names/words (from a string) that start and end with the same letter. * Case-insensitive. * If a name/word is not at the...

5 years ago

Solved

Total energy

5 years ago

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Potential energy calculation

5 years ago

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Kinetic energy calculation

5 years ago

Solved

Laws of motion 7

5 years ago

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Learn MATLAB

5 years ago

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Learn MATLAB

5 years ago

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Learn MATLAB

5 years ago