2.1.24.6.3 ocmath_confidence_levels_for_variance

1 Description
2 Syntax
3 Parameters
4 Return
5 Examples
6 Remark
7 See Also
8 Header to Included
9 Reference

Description

Function to compute confidence levels for a variance.

Syntax

int ocmath_confidence_levels_for_variance( UINT nLevels, const double * pLevels, const double dSD, const double dDOF, double * pLCLs, double * pUCLs )

Parameters

nLevels: [input] number of levels in pLevels.
pLevels: [input] pointer to confidence levels, e.g. {0.9, 0.95, 0.99}
dSD: [input] value of SD of input data for variance test
dDOF: [input] DOF of input data for variance test
pLCLs: [Output] pointers to Lower Confidence Limits for variance
pUCLs: [Output] pointers to Upper Confidence Limits for variance

Return

Returns STATS_NO_ERROR on successful exit and a non-zero STATS error code on failure.

Examples

EX1

void ocmath_confidence_levels_for_variance_ex1()
{
    vector vLevels = {0.9, 0.95, 0.99};
    UINT nLevels = vLevels.GetSize();
    double SD = 0.1, DOF = 3.0;
    vector vLCLs, vUCLs;
    vLCLs.SetSize(nLevels);
    vUCLs.SetSize(nLevels);

    int nRet = ocmath_confidence_levels_for_variance(nLevels, vLevels, SD, DOF, vLCLs, vUCLs);
    out_int("nRet=", nRet); //nRet = 0;
    int ii;
    
    //print out Lower Confidence Limits for variance
    printf("vLCLs = {");
    for(ii=0; ii<vLCLs.GetSize(); ii++)
    {
        printf("%f\t", vLCLs[ii]);
    }
    printf("}\n");
    
    //print out Upper Confidence Limits for variance
    printf("vUCLs = {");
    for(ii=0; ii<vUCLs.GetSize(); ii++)
    {
        printf("%f\t", vUCLs[ii]);
    }
    printf("}\n");
}