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How unique?
Sometimes, when we check unique entries of vector we would like to know how many times each value occurs. Given vector of num...

circa 8 anni fa

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Max Change in Consecutive Elements
If an array is given as input then find the index of consecutive elements that represent maximum change. Example: Input ...

circa 8 anni fa

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counting groups!
This problem is about counting groups. Example If you have x: x = [0.8 0.8 0.8 0.3 0.3 0.4 0.5 0.6 0.6 0.9] then a...

circa 8 anni fa

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Tridiagonal
Return an n-by-n matrix that has a, b, c as the subdiagonal, main diagonal, and superdiagonal entries in the matrix. Example ...

circa 8 anni fa

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Another colon problem
This is simple problem based on problems 555, 801, 1118, etc. Create an index vector from two input vectors. Example: ...

circa 8 anni fa

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Time Expansion
How can you slow down any discrete-time signal? Example Input original signal x. x = [1 2 3 -1 -2 -5 -4] We want t...

circa 8 anni fa

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Find the maximum two numbers of every column of a matrix
Find the maximum two numbers of every column of a matrix. Example: If we input a matrix A = [ 1 2 4 6 0 3 ...

circa 8 anni fa

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Find the index of n in magic(n)
If input n=5, then magic(n) is 17 24 1 8 15 23 5 7 14 16 4 6 13 20 22...

circa 8 anni fa

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Sort numbers by outside digits
Sort the array so that they are sorted as if their value was a 5 digit number made from the first three and last two digits of t...

circa 8 anni fa

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Sum of odd numbers in a matrix
Find the sum of all the odd numbers in a matrix. Example x = [2 3 5 7 1 4 11] y = 27

circa 8 anni fa

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Back to basics - mean of corner elements of a matrix
Calculate the mean of corner elements of a matrix. e.g. a=[1 2 3; 4 5 6; 7 8 9;] Mean = (1+3+7+9)/4 = 5

circa 8 anni fa

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Without the French accent please!
Suppress the French accent. Example 'Déjà présent' -> 'Deja present'

circa 8 anni fa

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Formatting currency numbers
Given a number, format it properly for textual display using the notation $xxx,xxx,xxx.xx. Assume that no more than two digits ...

circa 8 anni fa

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Removing rows from a matrix is easy - but what about inserting rows?
Assume A is a 5-by-5 matrix. A([2,4],:) = [] is a quick way to remove rows 2 and 4. Can you find a quick way to insert rows into...

circa 8 anni fa

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Operate on matrices of unequal, yet similar, size
You may want to add a vector to a matrix, implying that the vector is added to each column of the matrix. Or multiply a 3x4x5 ma...

circa 8 anni fa

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N-Dimensional Array Slice
Given an N-dimensional array, _A_, an index, _I_, and a dimension, _d_, return the _I_ th elements of _A_ in the _d_ dimension. ...

circa 8 anni fa

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Set some matrix elements to zero
First get the maximum of each *row*, and afterwards set all the other elements to zero. For example, this matrix: 1 2 3 ...

circa 8 anni fa

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Make an awesome ramp for a tiny motorcycle stuntman
Okay, given a vector, say v=[1 3 6 9 11], turn it into a matrix 'ramp' like so: m=[1 3 6 9 11; 3 6 9 11 0; 6 9 ...

circa 8 anni fa

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Rotate input square matrix 90 degrees CCW without rot90
Rotate input matrix (which will be square) 90 degrees counter-clockwise without using rot90,flipud,fliplr, or flipdim (or eval)....

circa 8 anni fa

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Create a vector whose elements depend on the previous element
The idea is to create a vector A whose elements depend on the previous element : *A(i+1) = 2*A(i)+1* *2 Inputs*: - A : The...

oltre 8 anni fa

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Convert a structure into a string
Convert the contents of each fields into a string. Example with an input structure s with 2 fields : s.age = '33' s....

oltre 9 anni fa

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Use of regexp
Given a string, containing several sentences, such as: 'I played piano. John played football. Anita went home. Are you safe?...

oltre 9 anni fa

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Compress strings (not springs)
Please remove excess space, limit one space between others, and no space before punctuation marks. * For example, 'Trendy , ...

oltre 9 anni fa

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Convert String to Morse Code
Convert a given string to international <http://en.wikipedia.org/wiki/Morse_code Morse Code> * Strings will only have [A-z], ...

quasi 10 anni fa

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Split a string into chunks of specified length
Given a string and a vector of integers, break the string into chunks whose lengths are given by the elements of the vector. Ex...

quasi 10 anni fa

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Guess Cipher
Guess the formula to transform strings as follows: 'Hello World!' --> 'Ifmmp Xpsme!' 'Can I help you?' --> 'Dbo J ifmq zpv...

quasi 10 anni fa

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Add more zeros
Find code that adds one 0 to each sequence of 0 in a string (composed with only 0 or 1). For example: '1010' -> '100100' ...

quasi 10 anni fa

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Cell Counting: How Many Draws?
You are given a cell array containing information about a number of soccer games. Each cell contains one of the following: * ...

quasi 10 anni fa

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letter yes yes & letter no no
Split a string into two strings, wherein the first string has all alphabetic letters and the second string has all the remaining...

quasi 10 anni fa

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Sudoku square
We have a small Sudoku square, but one number is missing. x = [ 1 5 4 8 6 3 0 9 7 ] Make a function, wher...

quasi 10 anni fa