//Calculate what breakpoint index to use
public static int BreakpointIndexCalculation(double Pollutant, BreakPointTable B)
{
int breakPointIndex = 0;
if (Pollutant != 0)
{
for (int i = 0; i < 6; i++)
{
double low = B.Low[i];
double high = B.High[i];
if (Pollutant >= low && Pollutant <= high)
{
breakPointIndex = i;
break;
}
}
}
else
{
breakPointIndex = int.MaxValue;
}
return(breakPointIndex);
}
public static double AQIEquation(double pollutantReading, int breakpointIndex, BreakPointTable breakPoint)
{
//index 7 in breakpoint table is the AQI
double Ihi = breakPointTable[7].High[breakpointIndex];
double Ilo = breakPointTable[7].Low[breakpointIndex];
double BPhi = breakPoint.High[breakpointIndex];
double BPlow = breakPoint.Low[breakpointIndex];
double Cp = pollutantReading;
double AQIForPollutant = ((Ihi - Ilo) / (BPhi - BPlow)) * (Cp - BPlow) + Ilo;
return(AQIForPollutant);
}
