Exemple #1
0
        public static String getHTMLEval(String input)
        {
            String workingInput = cleanInput(input);

            Expression expressionToEval = MathEngine.getExpressionFromString(workingInput);

            if (expressionToEval == null)
            {
                return(HTMLizer.prepareForHTML(input));
            }
            else
            {
                Expression evaluated = expressionToEval.cloneAndSubstitute(MathEngine.Table).evaluate();
                return(@"\(" + evaluated.toHTML() + @"\)");
            }
        }
Exemple #2
0
        public static String getHTMLPlot(String input)
        {
            String workingInput = cleanInput(input);

            String[] partsOfCommand = workingInput.Split(new Char[] { ',' });

            if (partsOfCommand.Length != 4)
            {
                return(HTMLizer.prepareForHTML(input));
            }
            try
            {
                Double lowerLimit     = Double.Parse(partsOfCommand[1]);
                Double upperLimit     = Double.Parse(partsOfCommand[2]);
                int    numberOfPoints = int.Parse(partsOfCommand[3]);

                if (lowerLimit > upperLimit || numberOfPoints <= 0)
                {
                    return(HTMLizer.prepareForHTML(input));
                }

                Expression    expr          = MathEngine.getExpressionFromString(partsOfCommand[0]);
                List <Symbol> symbolsInExpr = new List <Symbol>();
                if (expr == null || (symbolsInExpr = expr.symbolsInExpression(symbolsInExpr)).Count != 1 || !expr.canEvaluateIfSymbolsConst(symbolsInExpr.ToArray()))
                {
                    return(HTMLizer.prepareForHTML(input));
                }

                List <KeyValuePair <Double, Double> > points = new List <KeyValuePair <Double, Double> >();
                loadPoints(ref points, expr, symbolsInExpr[0], lowerLimit, upperLimit, numberOfPoints);
                return(generateHTMLPlot(points));
            }
            catch (Exception)
            {
                return(HTMLizer.prepareForHTML(input));
            }
        }