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carnd-extended-kalman-filter's Issues

missing rho_dot in intialization scope

in FusionEKF.cpp file

<

VectorXd x(4);
if( measurement_pack.sensor_type_ == MeasurementPackage::RADAR ) 
{
  // Convert radar from polar to cartesian coordinates and initialize state.
  float rho = measurement_pack.raw_measurements_[0];
  float phi = measurement_pack.raw_measurements_[1];

 x << rho*cos(phi), rho*sin(phi), 0.f, 0.f;

#>

why not git the value of rho_dot for RADAR to be
float rho_dot = measurement_pack.raw_measurements_[2];
then x << rhocos(phi), rhosin(phi), rho_dotcos(phi), rho_dotsin(phi);

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