How do you find the median of an unsorted list?

How do you find the median of an unsorted list?

Given an unsorted array arr[] of length N, the task is to find the median of of this array….Naive Approach:

1. Sort the array arr[] in increasing order.
2. If number of elements in arr[] is odd, then median is arr[n/2].
3. If the number of elements in arr[] is even, median is average of arr[n/2] and arr[n/2+1].

Do you have to sort to find median?

But in general, it should be sorted, it gives a clear view, that what is the median on the basis of the sorting pattern. Arbitrary arrangement means, if the data is arranged in unique IDs.

How do you find the median without counting?

If you have an odd number, divide by 2 and round up to get the position of the median number. If you have an even number, divide by 2. Go to the number in that position and average it with the number in the next higher position to get the median.

How would you find the median of an array?

Median of a sequence(or an array) of numbers is the middle element of the sequence when the total number of elements is odd or the average of middle elements when the total number of elements is even, provided the sequence is sorted. Thus, If n is odd then Median (M) = value of ((n + 1)/2)th item term.

How do you find the median of an array?

To calculate the median first we need to sort the list in ascending or descending order. If the number of elements are even, then the median will the average of two numbers in the middle. But the number is odd then the middle element of the array after sorting will be considered as the median.

How do you find the median of a number?

To find the median:

1. Arrange the data points from smallest to largest.
2. If the number of data points is odd, the median is the middle data point in the list.
3. If the number of data points is even, the median is the average of the two middle data points in the list.

How do you find the median of a set of data?

Add up all of the numbers and divide by the number of numbers in the data set. The median is the central number of a data set. Arrange data points from smallest to largest and locate the central number. This is the median.