65 lines
2.2 KiB
Python
65 lines
2.2 KiB
Python
import math
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from mathutils import fit_polynomial, PolynomialFunction
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from plotutils import plot_line, plot_function
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import org.apache.commons.math3.stat.correlation.PearsonsCorrelation as PearsonsCorrelation
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if get_context().source == CommandSource.ui:
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dx = "SINEG01-MSOL130:X"
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dy = "SINEG01-MSOL130:Y"
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interval = 0.20
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window = 40
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p = plot(None)[0]
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p.removeSeries(p.getSeries(0))
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p.addSeries(LinePlotSeries("Data"))
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if isinstance(dx, basestring):
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dx = Channel(dx) if get_device(dx) is None else get_device(dx)
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if isinstance(dy, basestring):
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dy = Channel(dy) if get_device(dy) is None else get_device(dy)
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sd=p.getSeries(0)
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sd.setLinesVisible(False)
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sd.setPointSize(4)
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marker=None
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while(True):
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#Sample and plot data
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x=dx.read()
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y=dy.read()
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sd.appendData(x, y)
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if len(sd.x) > window:
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#Remove First Element
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sd.token.remove(0)
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ax = sd.x
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ay = sd.y
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if len(ax)>2:
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x1, x2 = min(ax), max(ax)
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res = (x2-x1)/100
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if x1!=x2:
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#Display correlation
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corr= PearsonsCorrelation().correlation(to_array(ax,'d'), to_array(ay,'d'))
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s = "Correlation=" + str(round(corr,4))
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#print s
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if marker is not None:
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p.removeMarker(marker)
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marker = p.addMarker(x2+res, p.AxisId.X, s, p.getBackground())
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marker.setLabelPaint(Color.BLACK)
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#Calculate, print and plot linear fit
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pars_lin = (a0,a1) = fit_polynomial(ay, ax, 1)
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#print "Fit lin a1:" , a1, " a0:",a0
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y1 = poly(x1, pars_lin)
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y2 = poly(x2, pars_lin)
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plot_line(p, x1, y1, x2, y2, width = 2, color = Color.BLUE, name = "Fit Linear")
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#Calculate, print and plot quadratic fit
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pars_quad = (a0,a1,a2) = fit_polynomial(ay, ax, 2)
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#print "Fit quad a2:" , a2, "a1:" , a1, " a0:",a0
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fitted_quad_function = PolynomialFunction(pars_quad)
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ax = frange(x1, x2, res, True)
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plot_function(p, fitted_quad_function, "Fit Quadratic", ax, color=Color.GREEN)
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time.sleep(interval)
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