common

func ArrayMax ¶

func ArrayMax(x []float64) (float64, bool)

arrayMax calculates the maximum value in array x

func ArrayMin ¶

func ArrayMin(x []float64) (float64, bool)

arrayMin calculates the minimum value in array x

func ArrayRange ¶

func ArrayRange(x []float64) (float64, bool)

arrayRange calculates the range of values in array x

func CalcAltitude ¶

func CalcAltitude(press float64, altoffset int) (altitude float64)

CalcAltitude determines the pressure altitude (feet) from the atmospheric pressure (hPa)

func CpuTempMonitor ¶

func CpuTempMonitor(updater CpuTempUpdateFunc)

func Degrees ¶

func Degrees(angle float64) float64

degrees converts angle from radians, and returns its value in degrees

func DegreesHdg ¶

func DegreesHdg(angle float64) float64

degreesHdg converts angle from radians, and returns its value in the range of 0+ to 360 degrees

func DegreesRel ¶

func DegreesRel(angle float64) float64

degreesRel converts angle from radians, and returns its value in the range of -180 to +180 degrees

func DistRect ¶

func DistRect(lat1, lon1, lat2, lon2 float64) (dist, bearing, distN, distE float64)

func DistRectEast ¶

func DistRectEast(lat1, lon1, lat2, lon2 float64) float64

distRectEast returns east-west distance from point 1 to point 2. Inputs are lat/lon in decimal degrees. Output is distance in meters (north positive)

func DistRectNorth ¶

func DistRectNorth(lat1, lat2 float64) float64

distRectNorth returns north-south distance from point 1 to point 2. Inputs are lat in decimal degrees. Output is distance in meters (east positive)

func Distance ¶

func Distance(lat1, lon1, lat2, lon2 float64) (dist, bearing float64)

distance calculates distance between two points using the law of cosines. Inputs are lat / lon of both points in decimal degrees Outputs are distance in meters and bearing to the target from origin in degrees (0° = north, 90° = east)

func IMax ¶

func IMax(x, y int) int

func IMin ¶

func IMin(x, y int) int

golang only defines min/max for float64. Really.

func IsCPUTempValid ¶

func IsCPUTempValid(cpuTemp float32) bool

Check if CPU temperature is valid. Assume <= 0 is invalid.

func IsRunningAsRoot ¶

func IsRunningAsRoot() bool

func LinReg ¶

func LinReg(x, y []float64) (slope, intercept float64, valid bool)

func LinRegWeighted ¶

func LinRegWeighted(x, y, w []float64) (slope, intercept float64, valid bool)

func Mean ¶

func Mean(x []float64) (float64, bool)

mean returns the arithmetic mean of array x

func Radians ¶

func Radians(angle float64) float64

radians converts angle from degrees, and returns its value in radians

func RadiansRel ¶

func RadiansRel(angle float64) float64

radiansRel converts angle from degrees, and returns its value in radians in the range -Pi to + Pi

func RoundToInt16 ¶

func RoundToInt16(in float64) (out int16)

roundToInt16 cheaply rounds a float64 to an int16, rather than truncating

func Stdev ¶

func Stdev(x []float64) (float64, bool)

stdev estimates the sample standard deviation of array x

func TriCubeWeight ¶

func TriCubeWeight(center, halfwidth, x float64) float64

triCubeWeight returns the value of the tricube weight function at point x, for the given center and halfwidth.