private void showVertex(double[] vertex, String heading)
{
lock (locker) {
var s = "";
for (int j = 0; j < numParams; j++)
{
s += " " + IJ.d2s(vertex[j], 8, 12);
}
s += " -> " + IJ.d2s(value(vertex), 8, 12);
}
}
/** Converts a number to a rounded formatted string.
* The 'significantDigits' argument specifies the minimum number
* of significant digits, which is also the preferred number of
* digits behind the decimal. Fewer decimals are shown if the
* number would have more than 'maxDigits'.
* Exponential notation is used if more than 'maxDigits' would be needed.
*/
public static string d2s(double x, int significantDigits, int maxDigits)
{
double log10 = Math.Log10(Math.Abs(x));
double roundErrorAtMax = 0.223 * Math.Pow(10, -maxDigits);
int magnitude = (int)Math.Ceiling(log10 + roundErrorAtMax);
int decimals = x == 0 ? 0 : maxDigits - magnitude;
if (decimals < 0 || magnitude < significantDigits + 1 - maxDigits)
{
return(IJ.d2s(x, -significantDigits)); // exp notation for large and small numbers
}
else
{
if (decimals > significantDigits)
{
decimals = Math.Max(significantDigits, decimals - maxDigits + significantDigits);
}
return(IJ.d2s(x, decimals));
}
}