Searched defs:sumXX (Results 1 - 1 of 1) sorted by relevance

/external/apache-commons-math/src/main/java/org/apache/commons/math/stat/regression/
H A DSimpleRegression.java70 private double sumXX = 0d; field in class:SimpleRegression
144 sumXX += dx * dx * (double) n / (n + 1d);
177 sumXX -= dx * dx * (double) n / (n - 1d);
239 sumXX = 0d;
317 if (FastMath.abs(sumXX) < 10 * Double.MIN_VALUE) {
320 return sumXY / sumXX;
353 return FastMath.max(0d, sumYY - sumXY * sumXY / sumXX);
384 return sumXX;
488 getMeanSquareError() * ((1d / (double) n) + (xbar * xbar) / sumXX));
503 return FastMath.sqrt(getMeanSquareError() / sumXX);
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