Problem


Find the elements of a matrix according to a defined property.
From A = [5,2,3] and B = [1,2,3,4,5,6,7,8,9,10] produce a vector C where : C(1) is the sum of the first A(1) elements of B, ...

fast 12 Jahre vor | 3 | 82 Lösungsvorschläge

Gelöst


Find the elements of a matrix according to a defined property.
From A = [5,2,3] and B = [1,2,3,4,5,6,7,8,9,10] produce a vector C where : C(1) is the sum of the first A(1) elements of B, ...

fast 12 Jahre vor

Problem


Matrix which contains the values of an other matrix A at the given locations.
If you have two matrices, which together give xc and yc coordinates into another matrix, eg : xc = [1 1 1; 2 2 1]; ...

fast 12 Jahre vor | 1 | 226 Lösungsvorschläge

Gelöst


Matrix which contains the values of an other matrix A at the given locations.
If you have two matrices, which together give xc and yc coordinates into another matrix, eg : xc = [1 1 1; 2 2 1]; ...

fast 12 Jahre vor

Problem


Create a matrix X, where each column is a shifted copy of the vector v
Example : in->v = (1:5)'; 1 2 3 4 5 out-> [1 5 4 3 2;2 1 5 4 3;3 2 1 5 4;4 3 2 1 5;5 4 3 ...

fast 12 Jahre vor | 1 | 193 Lösungsvorschläge

Gelöst


Create a matrix X, where each column is a shifted copy of the vector v
Example : in->v = (1:5)'; 1 2 3 4 5 out-> [1 5 4 3 2;2 1 5 4 3;3 2 1 5 4;4 3 2 1 5;5 4 3 ...

fast 12 Jahre vor

Problem


Duplicate each element of a vector.
for an n-dimensional vector x, the function should return another vector 2n-dimension which each element is repeated twice. Ex...

fast 12 Jahre vor | 1 | 596 Lösungsvorschläge

Gelöst


Duplicate each element of a vector.
for an n-dimensional vector x, the function should return another vector 2n-dimension which each element is repeated twice. Ex...

fast 12 Jahre vor

Problem


First non-zero element in each column
For a given matrix, calculate the index of the first non-zero element in each column. Assuming a column with all elements zero ...

etwa 12 Jahre vor | 6 | 832 Lösungsvorschläge

Gelöst


Duplicates
Write a function that accepts a cell array of strings and returns another cell array of strings *with only the duplicates* retai...

etwa 12 Jahre vor

Gelöst


Maximum running product for a string of numbers
Given a string s representing a list of numbers, find the five consecutive numbers that multiply to form the largest number. Spe...

etwa 12 Jahre vor

Gelöst


The Goldbach Conjecture
The <http://en.wikipedia.org/wiki/Goldbach's_conjecture Goldbach conjecture> asserts that every even integer greater than 2 can ...

etwa 12 Jahre vor

Gelöst


First N Perfect Squares
*Description* Return the first N perfect squares *Example* input = 4; output = [ 1 4 9 16 ];

etwa 12 Jahre vor

Gelöst


Number of 1s in the Binary Representation of a Number
*Description* Return the number of 1s in the (unsigned integer) binary representation of a number. This function should be ab...

etwa 12 Jahre vor

Gelöst


Swap the first and last columns
Flip the outermost columns of matrix A, so that the first column becomes the last and the last column becomes the first. All oth...

etwa 12 Jahre vor

Gelöst


Balanced number
Given a positive integer find whether it is a balanced number. For a balanced number the sum of first half of digits is equal to...

etwa 12 Jahre vor

Gelöst


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...

etwa 12 Jahre vor

Gelöst


Target sorting
Sort the given list of numbers |a| according to how far away each element is from the target value |t|. The result should return...

etwa 12 Jahre vor

Gelöst


Finding Perfect Squares
Given a vector of numbers, return true if one of the numbers is a square of one of the other numbers. Otherwise return false. E...

etwa 12 Jahre vor

Gelöst


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

etwa 12 Jahre vor

Gelöst


Find the alphabetic word product
If the input string s is a word like 'hello', then the output word product p is a number based on the correspondence a=1, b=2, ....

etwa 12 Jahre vor

Gelöst


Create times-tables
At one time or another, we all had to memorize boring times tables. 5 times 5 is 25. 5 times 6 is 30. 12 times 12 is way more th...

etwa 12 Jahre vor

Problem


Matrix with different incremental runs
Given a vector of positive integers a (>=0); How does one create the matrix where the ith column contains the vector 1:a(i) poss...

etwa 12 Jahre vor | 1 | 122 Lösungsvorschläge

Gelöst


Matrix with different incremental runs
Given a vector of positive integers a (>=0); How does one create the matrix where the ith column contains the vector 1:a(i) poss...

etwa 12 Jahre vor

Gelöst


First non-zero element in each column
For a given matrix, calculate the index of the first non-zero element in each column. Assuming a column with all elements zero ...

etwa 12 Jahre vor

Gelöst


Nearest Numbers
Given a row vector of numbers, find the indices of the two nearest numbers. Examples: [index1 index2] = nearestNumbers([2 5 3...

etwa 12 Jahre vor

Gelöst


Make a checkerboard matrix
Given an integer n, make an n-by-n matrix made up of alternating ones and zeros as shown below. The a(1,1) should be 1. Example...

etwa 12 Jahre vor

Gelöst


Summing digits
Given n, find the sum of the digits that make up 2^n. Example: Input n = 7 Output b = 11 since 2^7 = 128, and 1 + ...

etwa 12 Jahre vor

Gelöst


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...

etwa 12 Jahre vor

Gelöst


Most nonzero elements in row
Given the matrix a, return the index r of the row with the most nonzero elements. Assume there will always be exactly one row th...

etwa 12 Jahre vor

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