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Pregunta
Slower processing of arrays in structures and pre-allocation
I'm aware its best practice to pre-allocate large arrays to avoid growing them. Not doing so slows down execution as explained ...
alrededor de 4 años hace | 1 respuesta | 0
1
respuestaResuelto
Simple equation: Annual salary
Given an hourly wage, compute an annual salary by multiplying the wage times 40 and times 50, because salary = wage x 40 hours/w...
más de 11 años hace
Resuelto
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...
alrededor de 12 años hace
Resuelto
Which values occur exactly three times?
Return a list of all values (sorted smallest to largest) that appear exactly three times in the input vector x. So if x = [1 2...
alrededor de 12 años hace
Resuelto
Too mean-spirited
Find the mean of each consecutive pair of numbers in the input row vector. For example, x=[1 2 3] ----> y = [1.5 2.5] x=[1...
alrededor de 12 años hace
Resuelto
Sorted highest to lowest?
Return 1 if the input is sorted from highest to lowest, 0 if not. Example: 1:7 -> 0 [7 5 2] -> 1
alrededor de 12 años hace
Resuelto
Is my wife right? Now with even more wrong husband
Again, as in "Is my wife right?" ( <http://www.mathworks.com/matlabcentral/cody/problems/149-is-my-wife-right> ), answer 'yes' r...
alrededor de 12 años hace
Resuelto
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...
alrededor de 12 años hace
Resuelto
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...
alrededor de 12 años hace
Resuelto
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...
casi 13 años hace
Resuelto
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 + ...
alrededor de 13 años hace
Resuelto
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...
alrededor de 13 años hace
Resuelto
Who Has the Most Change?
You have a matrix for which each row is a person and the columns represent the number of quarters, nickels, dimes, and pennies t...
alrededor de 13 años hace
Resuelto
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...
más de 13 años hace
Resuelto
Remove any row in which a NaN appears
Given the matrix A, return B in which all the rows that have one or more <http://www.mathworks.com/help/techdoc/ref/nan.html NaN...
más de 13 años hace
Resuelto
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...
más de 13 años hace
Resuelto
Right and wrong
Given a vector of lengths [a b c], determines whether a triangle with those sides lengths is a right triangle: <http://en.wikipe...
más de 13 años hace
Resuelto
Tell me the slope
Tell me the slope, given a vector with horizontal run first and vertical rise next. Example input: x = [10 2];
más de 13 años hace
Resuelto
Remove DC
Input x is the sampled signal vector, may have both AC and DC components. Output y should not contain any DC component. Examp...
más de 13 años hace
Resuelto
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...
más de 13 años hace
Resuelto
More luck than brains
Give a random function that guess and return numbers from 1 to 6 exactly like the test suite .
más de 13 años hace
Resuelto
Roll the Dice!
*Description* Return two random integers between 1 and 6, inclusive, to simulate rolling 2 dice. *Example* [x1,x2] =...
más de 13 años hace
Resuelto
Bottles of beer
Given an input number representing the number of bottles of beer on the wall, output how many are left if you take one down and ...
más de 13 años hace
Resuelto
radius of a spherical planet
you just measured its surface area, that is the input.
más de 13 años hace
Resuelto
Make one big string out of two smaller strings
If you have two small strings, like 'a' and 'b', return them put together like 'ab'. 'a' and 'b' => 'ab' For extra ...
más de 13 años hace
Resuelto
Binary numbers
Given a positive, scalar integer n, create a (2^n)-by-n double-precision matrix containing the binary numbers from 0 through 2^n...
más de 13 años hace
Resuelto
Omit columns averages from a matrix
Omit columns averages from a matrix. For example: A = 16 2 3 13 5 11 10 8 9 7 ...
más de 13 años hace
Resuelto
Find the numeric mean of the prime numbers in a matrix.
There will always be at least one prime in the matrix. Example: Input in = [ 8 3 5 9 ] Output out is 4...
más de 13 años hace
Resuelto
Column Removal
Remove the nth column from input matrix A and return the resulting matrix in output B. So if A = [1 2 3; 4 5 6]; and ...
más de 13 años hace
