<%@page import="ChartDirector.*" %>
<%
//Use random table to generate a random series. The random table is set to 1 col
//x 51 rows, with 9 as the seed
RanTable rantable = new RanTable(9, 1, 51);
//Set the 1st column to start from 100, with changes between rows from -5 to +5
rantable.setCol(0, 100, -5, 5);
//Get the 1st column of the random table as the data set
double[] data = rantable.getCol(0);
//Create a XYChart object of size 600 x 300 pixels
XYChart c = new XYChart(600, 300);
//Set the plotarea at (50, 35) and of size 500 x 240 pixels. Enable both the
//horizontal and vertical grids by setting their colors to grey (0xc0c0c0)
c.setPlotArea(50, 35, 500, 240).setGridColor(0xc0c0c0, 0xc0c0c0);
//Add a title to the chart using 18 point Times Bold Itatic font.
c.addTitle("LOWESS Generic Curve Fitting Algorithm", "timesbi.ttf", 18);
//Set the y axis line width to 3 pixels
c.yAxis().setWidth(3);
//Add a title to the x axis using 12 pts Arial Bold Italic font
c.xAxis().setTitle("Server Load (TPS)", "arialbi.ttf", 12);
//Set the x axis line width to 3 pixels
c.xAxis().setWidth(3);
//Set the x axis scale from 0 - 50, with major tick every 5 units and minor tick
//every 1 unit
c.xAxis().setLinearScale(0, 50, 5, 1);
//Add a blue layer to the chart
LineLayer layer = c.addLineLayer2();
//Add a red (0x80ff0000) data set to the chart with square symbols
layer.addDataSet(data, 0x80ff0000).setDataSymbol(Chart.SquareSymbol);
//Set the line width to 2 pixels
layer.setLineWidth(2);
//Use lowess for curve fitting, and plot the fitted data using a spline layer
//with line width set to 3 pixels
c.addSplineLayer(new ArrayMath(data).lowess().result(), 0xff).setLineWidth(3);
//Set zero affinity to 0 to make sure the line is displayed in the most detail
//scale
c.yAxis().setAutoScale(0, 0, 0);
//output the chart
request.getSession().setAttribute("chart1", c.makeChart2(Chart.PNG));
%>
<html>
<body topmargin=0 leftmargin=5 rightmargin=0 marginwidth=5 marginheight=0>
<div style="font-size:18pt; font-family:verdana; font-weight:bold">
General Curve Fitting
</div>
<hr color="#000080">
<div style="font-size:10pt; font-family:verdana">
<a href="VIEWSOURCE.jsp?file=<%=request.getServletPath()%>">
View Chart Source Code
</a>
</div>
<br>
<img src="chart1.chart?no_cache=<%=Chart.getUniqueId()%>">
</body>
</html>