C# ST DEV. Please Help ASAP

Guys. Im a c# noob but I really need a professional's help. I am using visual studio 2005 for a project so I dont have math.linq I need to calculate the standard deviation of a generic list of objects. The list contains just a list of float numbers, nothing too complicated. However I have never done this before so i need someone to show me that has calculated standard deviation of a generic list before. Here is my code that I tried to start on:

//this is my list of objects inside. The valve data just contains a bunch of floats.

public class ValveDataResults

{

private List<ValveData> m_ValveResults;

public void AddValveData(ValveData valve)

{

m_ValveResults.Add(valve);

}

//this is the function where the standard deviation needs to be calculated:

public float LatchTimeStdev()

{

//below this is a working example of how to get an average or mean

//of same list and same "LatchTime" that needs to be calculated here as well.

}

//function to calculate average of latch time, can be copied for above st dev.

public float LatchTimeMean()

{

float returnValue = 0;

foreach (ValveData value in m_ValveResults)

{

returnValue += value.LatchTime;

}

returnValue = (returnValue / m_ValveResults.Count) * 0.02f;

return returnValue;

}

the "Latch Time" is a float object of the "ValveData" object which is inserted into the m_ValveResults list.

thats it. any help would much be appreciated. Thanks

Re: C# ST DEV. Please Help ASAP

All you need is to calculate the standard deviation?

I feel like I am missing something but here you go

Code:

` public static float LatchTimeStdev()`

{

float sum = 0.0f ;

float mean = LatchTimeMean();

for (int i = 0; i < m_ValveResults.Count; i++)

{

float val = (mean - m_ValveResults[i].LatchTime);

sum += val * val;

}

return (float)Math.Sqrt(sum / (m_ValveResults.Count - 1));

}