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刘学毅


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Solved


Back to basics 8 - Matrix Diagonals
Covering some basic topics I haven't seen elsewhere on Cody. Given an input vector of numbers, output a square array with the...

2 years ago

Solved


Distance walked 1D
Suppose you go from position 7 to 10 to 6 to 4. Then you have walked 9 units of distance, since 7 to 10 is 3 units, 10 to 6 is 4...

2 years ago

Solved


Find the sides of an isosceles triangle when given its area and height from its base to apex
Find the sides of an isosceles triangle when given its area and the height from its base to apex. For example, with A=12 and h=...

2 years ago

Solved


Dimensions of a rectangle
The longer side of a rectangle is three times the length of the shorter side. If the length of the diagonal is x, find the width...

2 years ago

Solved


How to find the position of an element in a vector without using the find function
Write a function posX=findPosition(x,y) where x is a vector and y is the number that you are searching for. Examples: fin...

2 years ago

Solved


Is this triangle right-angled?
Given any three positive numbers a, b, c, return true if the triangle with sides a, b and c is right-angled. Otherwise, return f...

2 years ago

Solved


given 3 sides, find area of this triangle
1:3 -> 0; 3:5 -> 6

2 years ago

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multiply by three
Given the variable x as your input, multiply it by 3 and put the result equal to y. Examples: Input x = 2 Output y is ...

2 years ago

Solved


Concatenate a successive power matrix in a column matrix
Generate F = [M1 M^2 ... M^p] with M a matrix, without using for.

2 years ago

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Tabuada
Dado um inteiro N, retorne um vetor contendo a tabuada de N de 1 a 10; ex: Tabuada(5) = [5, 10, 15, 20, 25, 30, 35, 40, 45, 50...

2 years ago

Solved


False position (linear interpolation) method of finding a root.
Test the false position algorithm described in Chapter 5 of Steven C. Chapra's textbook, Applied Numerical Methods with MATLAB f...

2 years ago

Solved


Find collatz series next number
For given x, if x is even, output is (x/2) if x is odd, output is (3x+1)

2 years ago

Solved


Rotate counterclockwise a matrix 90 deg with left-bottom element
Example: Input [ 1 2 3 4 5 6 ] Output [ 3 6 2 5 1 4 ]

2 years ago

Solved


Returning a "greater than" vector
Given a vector, v, return a new vector , vNew, containing only values > n. For example: v=[1 2 3 4 5 6] n=3 vNew =...

2 years ago

Solved


Palindrome vector
Check if a given vector is Palindrome. Example, [1 2 54 32 45 5 33 456 45 456 33 5 45 32 54 2 1]

2 years ago

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Palindrome String
Determine if the inputted string is a palindrome. That is, the string is the same forwards as it is backwards. For example: ...

2 years ago

Solved


sinus de pulsation a
Ecrire une fonction sinat qui prend en entrée un vecteur t (de valeurs croissantes) et renvoie un vecteur y de de même dimensi...

2 years ago

Solved


Caracteres Unicos
Dada uma string, verifique se a string é composta de caracteres únicos, ou seja, nenhuma letra se repete. Retorne true ou false;...

2 years ago

Solved


Find the peak 3n+1 sequence value
A Collatz sequence is the sequence where, for a given number n, the next number in the sequence is either n/2 if the number is e...

2 years ago

Solved


Summing Digits within Text
Given a string with text and digits, add all the numbers together. Examples: Input str = '4 and 20 blackbirds baked in a...

2 years ago

Solved


Scrabble Scores
Given a word, determine its score in <http://en.wikipedia.org/wiki/Scrabble Scrabble>. The input string will always be provi...

2 years ago

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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 = 2...

2 years ago

Solved


Pangrams!
A pangram, or holoalphabetic sentence, is a sentence using every letter of the alphabet at least once. Example: Input s ...

2 years ago

Solved


Remove the vowels
Remove all the vowels in the given phrase. Example: Input s1 = 'Jack and Jill went up the hill' Output s2 is 'Jck nd Jll wn...

2 years ago

Solved


Find all elements less than 0 or greater than 10 and replace them with NaN
Given an input vector x, find all elements of x less than 0 or greater than 10 and replace them with NaN. Example: Input ...

2 years ago

Solved


Neural Net: Best Index of Prediction array
The final ouput of a neural net application is a Prediction matrix/vector,P, that gives the probability of the input being of a ...

2 years ago

Solved


Array Height (no usage of size)
Find the array height, the number of rows. Size may not be used.

2 years ago

Solved


Array Width (no usage of size)
Find the array width. Size may not be used.

2 years ago

Solved


Return the largest number that is adjacent to a zero
This example comes from Steve Eddins' blog: <http://blogs.mathworks.com/steve/2009/05/27/learning-lessons-from-a-one-liner/ Lear...

2 years ago

Solved


Return the 3n+1 sequence for n
A Collatz sequence is the sequence where, for a given number n, the next number in the sequence is either n/2 if the number is e...

2 years ago

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