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Index › Programming Questions & Help › Syntax Questions › get array max value

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get array max value (Read 893 times)

ctrlbulb YaBB Newbies Offline Posts: 5	get array max value Nov 30^th, 2005, 5:55pm sorry for my english and question about processing, but i am, in both, a beginner. how i can get the max value and his position from an array? thanxs

JohnG

Re: get array max value
Reply #1 - Nov 30^th, 2005, 8:08pm

If you know that the values in the array are all greater than, 0 (or some other known value) then you can easily use the following:

Code:


float maxValue=0; //or int, if it's an array of ints
int position=-1;
for(int i=0;i<myArray.length;i++) //check all values in array
{
  if(myArray[i]>maxValue) // check to see if current value is highest so far
  {
    position=i; // if so, store what number it is
    maxValue=myArray[i]; // and what its value is
  }
}
if(position==-1)
{
  println("Oops, all values are less than 0");
}
else
{
  println("Max value:"+maxValue+", at number:"+position);
}

fry

Re: get array max value
Reply #2 - Nov 30^th, 2005, 9:03pm

or even a little tweak:

Code:

if (array.length == 0) {
  println("nothing in the array.");

} else {
  float maxValue = array[0];
  int maxIndex = 0;
  for (int i = 1; i < array.length; i++) {
    if (array[i] > maxValue) {
	maxValue = array[i];
	maxIndex = i;
    }
  }
  print("max value is " + maxValue);
  println(" at position " + maxIndex);
}

ctrlbulb YaBB Newbies Offline Posts: 5	Re: get array max value Reply #3 - Dec 1^st, 2005, 4:06pm thank you very much. it takes a little time to understand it, but it works well. it serves in order to make me to move one ball with the sound of one voice, with the LiveInput.getSpectrum array of sonia.

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