List of usage examples for java.lang Math atan
public static double atan(double a)
From source file:org.lightjason.agentspeak.action.builtin.TestCActionMath.java
/** * data provider generator for single-value tests * @return data/*from w w w . j a va 2 s .co m*/ */ @DataProvider public static Object[] singlevaluegenerate() { return Stream.concat( singlevaluetestcase( Stream.of(2.5, 9.1, 111.7, 889.9), Stream.of(CNextPrime.class), (i) -> (double) Primes.nextPrime(i.intValue())), singlevaluetestcase( Stream.of(-2, -6, 4, -1, -5, 3, 49, 30, 6, 5, 1.3, 2.8, 9.7, 1, 8, 180, Math.PI), Stream.of(CAbs.class, CACos.class, CASin.class, CATan.class, CCeil.class, CCos.class, CCosh.class, CDegrees.class, CExp.class, CIsPrime.class, CLog.class, CLog10.class, CFloor.class, CRadians.class, CRound.class, CSignum.class, CSin.class, CSinh.class, CSqrt.class, CTan.class, CTanh.class), (i) -> Math.abs(i.doubleValue()), (i) -> Math.acos(i.doubleValue()), (i) -> Math.asin(i.doubleValue()), (i) -> Math.atan(i.doubleValue()), (i) -> Math.ceil(i.doubleValue()), (i) -> Math.cos(i.doubleValue()), (i) -> Math.cosh(i.doubleValue()), (i) -> Math.toDegrees(i.doubleValue()), (i) -> Math.exp(i.doubleValue()), (i) -> Primes.isPrime(i.intValue()), (i) -> Math.log(i.doubleValue()), (i) -> Math.log10(i.doubleValue()), (i) -> Math.floor(i.doubleValue()), (i) -> Math.toRadians(i.doubleValue()), (i) -> Math.round(i.doubleValue()), (i) -> Math.signum(i.doubleValue()), (i) -> Math.sin(i.doubleValue()), (i) -> Math.sinh(i.doubleValue()), (i) -> Math.sqrt(i.doubleValue()), (i) -> Math.tan(i.doubleValue()), (i) -> Math.tanh(i.doubleValue())) ).toArray(); }
From source file:edu.umich.eecs.tac.viewer.role.advertiser.CampaignGrpahsPanel.java
private double calcEffectiveReachRatio(double currentReach, double expectedReach) { return 2 / ERR_A * (Math.atan(ERR_A * currentReach / expectedReach - ERR_B) - Math.atan(-ERR_B)); }
From source file:org.cirdles.geoapp.LatLongToUTM.java
private static BigDecimal calcConformalLatitude(BigDecimal eccentricity, BigDecimal latitudeRadians) { BigDecimal conformalLatitude; double latRadDouble = latitudeRadians.doubleValue(); double eccDouble = eccentricity.doubleValue(); double confLatDouble; Atanh atanh = new Atanh(); Asinh asinh = new Asinh(); confLatDouble = Math.atan(Math.sinh( asinh.value(Math.tan(latRadDouble)) - eccDouble * atanh.value(eccDouble * Math.sin(latRadDouble)))); conformalLatitude = new BigDecimal(confLatDouble); return conformalLatitude; }
From source file:org.knowrob.vis.model.util.algorithm.ACCUM.java
/** * Calculate hue and saturation for curvature properties. * /* w w w . j av a 2s .c om*/ * @param curvatures * maps curvatures to vertices * @param smoothSigma * sigma value for smoothing the curvature. Set to 0 to disable smoothing. * @param m * model needed to calculate hue saturation scale */ public static void setCurvatureHueSaturation(HashMap<Vertex, Curvature> curvatures, Model m, float smoothSigma) { if (smoothSigma > 0.0f) { float scaledSigma = smoothSigma * m.feature_size(); diffuse_curv(m, curvatures, scaledSigma); } float cscale = 120.0f * typical_scale(curvatures, m); cscale = cscale * cscale; int nv = m.getVertices().size(); for (int i = 0; i < nv; i++) { Curvature c = curvatures.get(m.getVertices().get(i)); float H = 0.5f * (c.getCurvatureMax() + c.getCurvatureMin()); // mean curvature -> don't set the mean curvature here as we want only the initial one to be stored and this method is public float K = c.getCurvatureMax() * c.getCurvatureMin(); // Gaussian curvature -> don't set the Gaussian curvature here as we want only the initial one to be stored and this method is public float h = (float) (4.0f / 3.0f * Math.abs(Math.atan2(H * H - K, H * H * Math.signum(H)))); float s = (float) ((2 / Math.PI) * Math.atan((2.0f * H * H - K) * cscale)); c.setHue(h); c.setSaturation(s); } }
From source file:com.compomics.cell_coord.computation.impl.TrackOperatorImpl.java
@Override public void computeAngles(Track track) { Double[][] steps = track.getSteps(); Double[] angles = new Double[steps.length]; for (int row = 0; row < angles.length; row++) { // This method computes the phase theta by computing an arc tangent of y/x in the range of -pi to pi. double d = steps[row][1] / steps[row][0]; // if division is 0, the cell is going exactly back on its path! Double angleRadians = Math.atan(d) + 0; // need to add 0 to avoid signed 0 in Java // go from radians to degrees Double angleDegrees = Math.toDegrees(angleRadians); // if the angle is NaN (both deltaX and deltaY are zero), the cell stays exactly on place if (angleDegrees < 0) { angleDegrees = angleDegrees + 360; }/*from ww w .j av a 2s. co m*/ angles[row] = angleDegrees; } track.setAngles(angles); }
From source file:org.renjin.primitives.MathGroup.java
@Deferrable @Builtin//from w w w . j ava2s . c om @DataParallel(value = PreserveAttributeStyle.ALL, passNA = true) public static double atan(double x) { return Math.atan(x); }
From source file:gr.iit.demokritos.cru.cps.ai.ProfileMerger.java
public ArrayList<Double> CalculateUserTrends(ArrayList<String> users_features, Double start_time) throws ParseException { SimpleDateFormat sdfu = new SimpleDateFormat("yyyy-MM-dd kk:mm:ss"); ArrayList<Double> result = new ArrayList<Double>(); for (int i = 0; i < users_features.size(); i++) { SimpleRegression regression = new SimpleRegression(); String[] features = ((String) users_features.get(i)).split(";"); double average = 0.0; double f = 0.0; for (String s : features) { String[] inside_feature = s.split(","); //make timestamp secs Date udate = sdfu.parse(inside_feature[1]); double sec = udate.getTime(); if (sec > start_time) { continue; }/* w w w.j a v a2s . c o m*/ average += Double.parseDouble(inside_feature[0]); //fix mls regr regression.addData(sec, Double.parseDouble(inside_feature[0])); average = average / features.length; f = Math.atan(regression.getSlope());// atan of slope is the angle of the regression in rad if (Double.isNaN(f)) { f = 0; } if (f != 0 && (Math.toDegrees(f) > 90 || Math.toDegrees(f) < -90)) { if ((Math.toDegrees(f) / 90) % 2 == 0) {//make angles in [-90,90] f = Math.toDegrees(f) % Math.toDegrees(Math.PI / 2); } else { f = -Math.toDegrees(f) % Math.toDegrees(Math.PI / 2); } } f = f + Math.PI / 2;//refrain trend=0 } result.add(f); result.add(f * average); } return result; }
From source file:org.akvo.caddisfly.sensor.colorimetry.strip.util.OpenCVUtil.java
@SuppressWarnings("UnusedParameters") public static Mat detectStrip(Mat stripArea, StripTest.Brand brand, double ratioW, double ratioH) { List<Mat> channels = new ArrayList<>(); Mat sArea = stripArea.clone();//from w w w . j a v a 2 s. c o m // Gaussian blur Imgproc.medianBlur(sArea, sArea, 3); Core.split(sArea, channels); // create binary image Mat binary = new Mat(); // determine min and max NOT USED Imgproc.threshold(channels.get(0), binary, 128, MAX_RGB_INT_VALUE, Imgproc.THRESH_BINARY); // compute first approximation of line through length of the strip final WeightedObservedPoints points = new WeightedObservedPoints(); final WeightedObservedPoints corrPoints = new WeightedObservedPoints(); double tot, yTot; for (int i = 0; i < binary.cols(); i++) { // iterate over cols tot = 0; yTot = 0; for (int j = 0; j < binary.rows(); j++) { // iterate over rows if (binary.get(j, i)[0] > 128) { yTot += j; tot++; } } if (tot > 0) { points.add((double) i, yTot / tot); } } // order of coefficients is (b + ax), so [b, a] final PolynomialCurveFitter fitter = PolynomialCurveFitter.create(1); List<WeightedObservedPoint> pointsList = points.toList(); final double[] coefficient = fitter.fit(pointsList); // second pass, remove outliers double estimate, actual; for (int i = 0; i < pointsList.size(); i++) { estimate = coefficient[1] * pointsList.get(i).getX() + coefficient[0]; actual = pointsList.get(i).getY(); if (actual > LOWER_PERCENTAGE_BOUND * estimate && actual < UPPER_PERCENTAGE_BOUND * estimate) { //if the point differs less than +/- 10%, keep the point corrPoints.add(pointsList.get(i).getX(), pointsList.get(i).getY()); } } final double[] coefficientCorr = fitter.fit(corrPoints.toList()); double slope = coefficientCorr[1]; double offset = coefficientCorr[0]; // compute rotation angle double rotAngleDeg = Math.atan(slope) * 180 / Math.PI; //determine a point on the line, in the middle of strip, in the horizontal middle of the whole image int midPointX = binary.cols() / 2; int midPointY = (int) Math.round(midPointX * slope + offset); // rotate around the midpoint, to straighten the binary strip Mat dstBinary = new Mat(binary.rows(), binary.cols(), binary.type()); Point center = new Point(midPointX, midPointY); Mat rotMat = Imgproc.getRotationMatrix2D(center, rotAngleDeg, 1.0); Imgproc.warpAffine(binary, dstBinary, rotMat, binary.size(), Imgproc.INTER_CUBIC + Imgproc.WARP_FILL_OUTLIERS); // also apply rotation to colored strip Mat dstStrip = new Mat(stripArea.rows(), stripArea.cols(), stripArea.type()); Imgproc.warpAffine(stripArea, dstStrip, rotMat, binary.size(), Imgproc.INTER_CUBIC + Imgproc.WARP_FILL_OUTLIERS); // Compute white points in each row double[] rowCount = new double[dstBinary.rows()]; int rowTot; for (int i = 0; i < dstBinary.rows(); i++) { // iterate over rows rowTot = 0; for (int j = 0; j < dstBinary.cols(); j++) { // iterate over cols if (dstBinary.get(i, j)[0] > 128) { rowTot++; } } rowCount[i] = rowTot; } // find width by finding rising and dropping edges // rising edge = largest positive difference // falling edge = largest negative difference int risePos = 0; int fallPos = 0; double riseVal = 0; double fallVal = 0; for (int i = 0; i < dstBinary.rows() - 1; i++) { if (rowCount[i + 1] - rowCount[i] > riseVal) { riseVal = rowCount[i + 1] - rowCount[i]; risePos = i + 1; } if (rowCount[i + 1] - rowCount[i] < fallVal) { fallVal = rowCount[i + 1] - rowCount[i]; fallPos = i; } } // cut out binary strip Point stripTopLeft = new Point(0, risePos); Point stripBottomRight = new Point(dstBinary.cols(), fallPos); org.opencv.core.Rect stripAreaRect = new org.opencv.core.Rect(stripTopLeft, stripBottomRight); Mat binaryStrip = dstBinary.submat(stripAreaRect); // also cut out colored strip Mat colorStrip = dstStrip.submat(stripAreaRect); // now right end of strip // method: first rising edge double[] colCount = new double[binaryStrip.cols()]; int colTotal; for (int i = 0; i < binaryStrip.cols(); i++) { // iterate over cols colTotal = 0; for (int j = 0; j < binaryStrip.rows(); j++) { // iterate over rows if (binaryStrip.get(j, i)[0] > 128) { colTotal++; } } //Log.d("Caddisfly", String.valueOf(colTotal)); colCount[i] = colTotal; } stripAreaRect = getStripRectangle(binaryStrip, colCount, brand.getStripLength(), ratioW); Mat resultStrip = colorStrip.submat(stripAreaRect).clone(); // release Mat objects stripArea.release(); sArea.release(); binary.release(); dstBinary.release(); dstStrip.release(); binaryStrip.release(); colorStrip.release(); return resultStrip; }
From source file:Satellite.java
public static double[] Convert_To_Lat_Long(double[] posVec) { double Xcomp = posVec[0]; double Ycomp = posVec[1]; double Zcomp = posVec[2]; double longitude; double latitude; double altitude; //Done so all cases of longitudes are right if (Ycomp > 0) { if (Xcomp > 0) { longitude = Math.toDegrees(Math.atan(Ycomp / Xcomp)); } else {/*from w w w . jav a 2s.c o m*/ longitude = 180 - Math.toDegrees(Math.atan(Math.abs(Ycomp / Xcomp))); } } else { if (Xcomp > 0) { longitude = -1 * Math.toDegrees(Math.atan(Math.abs(Ycomp / Xcomp))); } else { longitude = -1 * (180 - Math.toDegrees(Math.atan(Ycomp / Xcomp))); } } //Calculate latitude latitude = Math.toDegrees(Math.atan(Zcomp / Math.sqrt(Xcomp * Xcomp + Ycomp * Ycomp))); //Calculate radius and altitude double EPR = 6356800; //Earth Polar Radius in meters double EER = 6378100; //Earth Equator Radius in meters double earthRadius = Math .sqrt((Math.pow(EPR * EPR * Math.cos(latitude), 2) + Math.pow(EER * EER * Math.cos(latitude), 2)) / (Math.pow(EPR * Math.cos(latitude), 2) + Math.pow(EER * Math.cos(latitude), 2))); double orbitRadius = Math.sqrt(Xcomp * Xcomp + Ycomp * Ycomp + Zcomp * Zcomp); altitude = orbitRadius - earthRadius; return new double[] { latitude, longitude, altitude }; }
From source file:org.cirdles.geoapp.LatLongToUTM.java
private static BigDecimal calcXiPrimeNorth(BigDecimal changeInLongitudeRadians, BigDecimal tauPrime) { double cosOfLatRad = Math.cos(changeInLongitudeRadians.doubleValue()); BigDecimal xiPrime = new BigDecimal(Math.atan(tauPrime.doubleValue() / cosOfLatRad)); return xiPrime; }