C program to calculate median of an array

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C program to calculate median of an array

By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. Code Review Stack Exchange is a question and answer site for peer programmer code reviews. It only takes a minute to sign up. Write a function that takes an array of 'ints' as its input and finds the smallest and largest elements.

It should also compute the median and mean. Use a struct holding the result as the return value. I found it quite awkward that there is no function to copy an array into another array, so I wrote one intdup to use it in the median calculation. See the the revised code her: Calculate min, max, mean and median out of array Version 2.

Mean Median Mode in Java

I think you meant to sort the duplicated array instead. The intdup function allocates and copies the passed array, but then that memory is never freed. I'd suggest freeing the memory again as soon as the function is done with the duplicate array. The variables len and mean are good because they suggest the significance of these variables in the context of the program.

However, result and numbers are a little generic. I'd suggest perhaps summaryData and testArray as possible replacement names.

Since unused variables are a sign of poor code quality, you should seek to eliminate them. Your compiler is probably smart enough to warn you about such things if you know how to ask it to do so. This suggestion is last for a reason. In this case, a productive approach is suggested by the wording of the question itself:. It says to write a function and that's a good strategy for this.

Since you're sorting the array anyway to get the median, you could also use the sorted array to easily get the min and max values from that sorted array.

c program to calculate median of an array

The mean could be calculated the same way you're currently doing it, but this would reduce the number of times that the array would need to be traversed. Use 2 compares instead. This common idiom is recognized by various compilers to emit efficient code.

Using the correct size of the type is error prone and harder to review and maintain. Using the size of the object is consistently correct. Sign up to join this community. The best answers are voted up and rise to the top. Home Questions Tags Users Unanswered. Calculate min, max, mean and median out of array Ask Question. Asked 1 year, 9 months ago.

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Active 10 months ago. Viewed 2k times. Use a struct holding the result as the return value I found it quite awkward that there is no function to copy an array into another array, so I wrote one intdup to use it in the median calculation.What is Median? 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.

When total elements are odd. When total elements are even. How to calculate Median in java Following are the different ways in which you can calculate median in a java program.

c program to calculate median of an array

Method 1 : Finding the middle element Program is given below. Above program initializes arrays with an odd number of elements and even number of elements and passes these arrays to a method which calculates median.

Program to calculate average of array in C

This method firsts sorts the array using sort method of java. Arrays class.

c program to calculate median of an array

After this, it checks if the total number of elements of array is even or odd by taking modulus of total elements with 2 and comparing the remainder with 0. If the remainder is 0, the number of elements are even else they are odd. If the total elements are oddit retrieves the middle element by dividing the total number of elements by 2.

If the total elements are evenit calculates the sum of middle two elements 12 and 15 and divides this sum by 2 to calculate the average of middle elements. Method 2 : Using Apache Math Library Apache Math library provides many utility classes and methods to calculate mathematical entities and solution to programming problems such as mean, median, matrix operations, complex numbers, probability distribution and many more.

This library has a class Median in package org. This class has a median method which takes an array and returns the median value from these array elements. Thus if you have an integer array, then you need to convert it to an array of double elements.

Usage of this library to calculate median is shown below. Note that now no sorting of array is required and you do not need to check the size of the array and provide different handling as per the total elements being odd or even, the library handles this stuff itself. Apache commons library can be found at this link.Forum Beginners Coding to find the median of an array.

Pages: 1 2. Jul 21, at am UTC. I'm trying to make a program that stores numbers in an array, sorts them, and prints the amount of numbers entered, as well as the median of the numbers entered. I've finished it mostly I think, except for the median part. It's throwing me for a loop a bit. Please try again. Last edited on Jul 21, at am UTC. That works!! Thank you so much! However, it is not printing out the correct median, it won't print decimals.

And changing index to a float doesn't work An index is always going to be an integer equal to or above 0. Sorry about that. And, messing with my code more, I don't think my formulas are spitting out the right numbers at all I have no idea why.

The existence of your "index" variable just increases the confusion in your code. Terapaht: Ooooh, that makes complete sense! Ganado: I think I need the "index" variable to count the amount of times a number is input.

Or are you just suggesting that I change the name? Yes I just noticed that you have a sentinel value if the number entered is below 0, so you would need to keep track of the max index.

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So I guess my code wasn't really helpful, but an std::vector would be more convenient to use in this case because you don't know how big of an array you'd need at compile time. It's up to you about variables' name. Another suggestion, you use 'i' instead of 'index' for assigning median, right? But if there's some code use 'i' before this, you'll have a non-sense mistake.

So I've got my numbers correct, but I still can't print it as a decimal! Post the lines of code where you assign a value to median.Median of a sorted array of size n is defined as the middle element when n is odd and average of middle two elements when n is even. Note that we can find median in O n time using methods discussed here and here.

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Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above. Writing code in comment?

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Please use ide. Given n size unsorted array, find its mean and median. Python3 program to find mean. Function for calculating mean. Function for calculating median. First we sort the array. This code is contributed by Smitha Dinesh Semwal. Sort a. Recommended Posts: Median of an unsorted array using Quick Select Algorithm Maximize the median of the given array after adding K elements to the same array Why is it faster to process sorted array than an unsorted array?

Improved By : Smitha Dinesh Semwalchitranayal. Load Comments.The following program takes n numbers as an input from the user that is stored in an array and mean is calculated c program to calculate mean using arrays. The mean is the average value of the data items. The mean is equal to the total of all the data items divided by the number of data items. The formula to calculate mean is:. Explanation In the above program, we have defined the maximum size of an array to be using macro SIZE.

Now if condition checks whether the number of data items entered by the user are in the range of 0 — or not. Using for loop program takes data entered by user and calculate sum.

Finally, an average of the data item is calculated using formula. Search for: Search. Skip to content. More C Examples. C program to read a character from keyboard and print it in reverse case i. C program to test if a number is a power of 2 C program to check whether a number is positive, negative or zero C program to check whether a number is palindrome or not C program to check whether a number is prime or not C program to encrypt and decrypt the string.Mean,Median,Mode program that you written is not working.

Median is correct but what about mean and mode??????? The modified program that i written is Ohh i can't post that pgm Can make a program of this problem? Create a program that will ask the user for n numbers then get the Median, the Mean and the Mode. The Mean is simply the average of the numbers. The Mode is the most frequent occurring number. It is important to note that there can be more than one mode and if no number occurs more than once in the set, then there is no mode for that set of numbers.

The Median is the middle value.

Avviso di estrazione a sorte del 10 ottobre 2018.

When n is odd, the median is the middle entry in the list after sorting the list into increasing order. When n is even then the median is equal to the sum of the two middle after sorting the list into increasing order numbers divided by two.

How to calculate median from array values(integer) in java

Sample output n is odd : Enter n: 5 n1: 15 n2: 18 n3: 22 n4: 15 n5: 24 The Mean is The Mode is The Median is Sample output n is even : Enter n: 6 n1: 15 n2: 12 n3: 3 n4: 6 n5: 5 n6: 10 The Mean is 8. There is no Mode. The Median is 8. Best Tutor Site On Internet. CCNA Questions. JAVA Tutor. VB Tutor.

c program to calculate median of an array

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World Of Mumbai University. Registry tricks For Fun. Shivaji Kolhapur University. Output Enter Elements 2 3 4 Enter Choice 1.

Mean 2. Median 3. Mode 4.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. The dark mode beta is finally here.

Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. I realize this would be much better to do within a class. However, my function to generate the mean is not spitting out the right number, although I'm pretty certain the logic is fine.

Also, I was able to modify a snipbit from something I found online to create a function that generates the mode, or at least the 1st most occurring values it can find, that I was able to implement. A better understanding of what is happening in the mode function and what the hell is going wrong in my mean function would be greatly appreciated.

Using such a variable will give you undefined behaviour. For one thing, you haven't initialized some of your variables.

In meanfor instance, you should have this:. I recommend you increase the warning level on your compiler. That would detect problems such as using uninitialized variables and unused variables which you have in main. Mode is one of the basic statistical operators; it represent the element with the highest frequency in an array.

Your function mode is a implementation of this operator: it creates a new array in which it stores the frequency of each element in the array i. The function returns the element with the highest frequency or, in case there are more with the same highest frequency, it returns the larges one. Learn more. Asked 6 years, 3 months ago. Active 6 years, 3 months ago. Viewed 30k times. No, it wouldn't be a single bit better within a class.

You have no state, so there's no need for a struct or a class. Free functions are much better for this than classes are. There's no need to complicate things. Thank you for letting me know! Active Oldest Votes.


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