void BartlettTest(TMtx Data, ref Int32 NumDim, TVec SignifVec, Double Alpha)
Performs the Bartlett test for dimensionality of data.
| # | Name | Description |
|---|---|---|
| 1 | Data | Data to be analyzed. |
| 2 | NumDim | Returns the number of dimensions needed to explain the non random variation in data. If NumDim is less than zero, the test cannot be applied to this data. |
| 3 | SignifVec | Returns calculated significance probabilities for one, two ... variables (dimensions). |
| 4 | Alpha | Desired significance. |
Result: stored in self (calling object)
Examples
using Dew.Math;
using Dew.Stat.Units;
namespace Dew.Examples
{
private void Example()
{
int numdim;
Matrix data = new Matrix(0,0);
Vector signifVec = new Vector(0);
data.LoadFromFile("c:\\temp\\data.mtx"); // load test data
Statistics.BartlettTest(data, out numdim, signifVec, 0.05); // Alpha = 5%
// returns numdim and signifVec
}
}See Also: Statistics.PCA