Find the average of an NSMutableArray with valueForKeyPath

Question

Currently I\'m trying to find a compact way to average a matrix. The obvious solution is to sum the matrix, then divide by the number of elements. I have, h

Answer 1

No, you can't do like this. The object Transaction is a Modal Class. This class is having three properties, namely

• payee
• amount
• date

Each row in this image represents one Transaction modal object.

transactions is an array which is holding all these rows (Transaction Modal Objects).

In these transactions array, they are trying to calculate the Transaction Modal amount field average using the operator @avg. So, its like

NSNumber *transactionAverage = [transactions valueForKeyPath:@"@avg.amount"];

your array doesn't have the key self. So that's the problem