/// <summary>式を検証し、結果を返す。</summary>
        /// <param name="formula"></param>
        /// <param name="count"></param>
        /// <param name="formula_LastValid"></param>
        /// <param name="resultList"></param>
        /// <param name="isValid"></param>
        protected void ValidateFormula(string formula, int count, string formula_LastValid, double[] resultList, out bool isValid)
        {
            FormulaEngine engine = Application.FormulaEngine;
            double        t;

            isValid = true;
            try
            {
                for (int i = 0; i < count; i++)
                {
                    t = i / (double)(count - 1);
                    resultList[i + 1] = engine.CalculateWithT(t, formula);
                }
            }
            catch (FormulaResultException)
            {
                isValid = false;
                for (int i = 0; i < count; i++)
                {
                    t = i / (double)(count - 1);
                    resultList[i + 1] = engine.CalculateWithT(t, formula_LastValid);
                }
            }
            try
            {
                t             = -1.0 / (double)(count - 1);
                resultList[0] = engine.CalculateWithT(t, formula);
            }
            catch (FormulaResultException)
            {
                resultList[0] = resultList[1];
            }
            try
            {
                t = count / (double)(count - 1);
                resultList[count + 1] = engine.CalculateWithT(t, formula);
            }
            catch (FormulaResultException)
            {
                resultList[count + 1] = resultList[count];
            }
        }