Assume that x is an n-by-2 matrix. The aim is to return the first column of x, but sorted according to the second column.
Input = [1 2 3 4 5;
4 3 1 2 2]'
Output = [3 4 5 2 1]'
Please! Can you explain more than that?
Aye! The first column is not "sorted according the second column" (only half an explanation). The block of numbers in each row is treated as a fixed unit, and each row is rearranged such that the values in the second column are sorted in ascending order.
Find best placement for ordered dominoes (harder)
Convert from Base 10 to base 5
Given a matrix, return the last eigen value
Calculate the derivative of a polynomial
Add a row of zeros on top of a matrix
function on a moving window
Choose a web site to get translated content where available and see local events and offers. Based on your location, we recommend that you select: .
You can also select a web site from the following list:
Select the China site (in Chinese or English) for best site performance. Other MathWorks country sites are not optimized for visits from your location.
Contact your local office