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  add Polynomial Regression as price chart overlay in FinanceChart
Posted by nyoman on Dec-21-2018 18:49
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Hi Peter,
is there any tutorial on how to add polynomial regression as overlay in FinanceChart
thanks

  Re: add Polynomial Regression as price chart overlay in FinanceChart
Posted by Peter Kwan on Dec-23-2018 04:21
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Hi nyoman,

A FinanceChart is a container for many charts - the main price chart, and zero or more indicator charts. You can add a polynomial regression line to any of these charts using code similar to the "Parametric Curve Fitting" sample code.

For example in C#, assumg "c" is a FinanceChart object, the code is like:

FinanceChart c = new FinanceChart(.....);
.....

// Add a main price chart to the FinanceChart
XYChart mainChart = c.addMainChart(....);

// Add a polynomial regression line of degree 2 for the closeData to the main price chart
TrendLayer trend0 = mainChart.addTrendLayer2(null, closeData, 0xff0000);
trend0.setLineWidth(3);
trend0.setRegressionType(Chart.PolynomialRegression(2));
trend0.setHTMLImageMap("{disable}");

.....

Hope this can help.

Regards
Peter Kwan

  Re: add Polynomial Regression as price chart overlay in FinanceChart
Posted by nyoman on Apr-22-2019 12:47
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adding the following code in FinanceChart.php
but still not working.
Please advise how to make it works.

function addPrc($color) {
        $tmpArrayMath1 = new ArrayMath($this->m_closeData);
        $tmpArrayMath1->abs();
        $cl = $tmpArrayMath1->result();

        $trend0 = $this->m_mainChart->addTrendLayer2(null, $cl, $color);
        $trend0->setLineWidth(3);
        $trend0->setRegressionType(PolynomialRegression(4));
$trend0->setHTMLImageMap("{disable}");
        return $trend0;
}