func ExampleLen3_Zero() {
// Example 3.c, p. 26.
x1 := 26.
x3 := 28.
// the y unit doesn't matter. working in degrees is fine
yTable := []float64{
base.DMSToDeg(true, 0, 28, 13.4),
base.DMSToDeg(false, 0, 6, 46.3),
base.DMSToDeg(false, 0, 38, 23.2),
}
d3, err := interp.NewLen3(x1, x3, yTable)
if err != nil {
fmt.Println(err)
return
}
x, err := d3.Zero(false)
if err != nil {
fmt.Println(err)
return
}
fmt.Printf("February %.5f\n", x)
i, frac := math.Modf(x)
fmt.Printf("February %d, at %.62s TD",
int(i), base.NewFmtTime(frac*24*3600))
// Output:
// February 26.79873
// February 26, at 19ʰ10ᵐ TD
}
func ExampleLen5_Zero() {
// Exercise, p. 30.
x1 := 25.
x5 := 29.
yTable := []float64{
base.DMSToDeg(true, 1, 11, 21.23),
base.DMSToDeg(true, 0, 28, 12.31),
base.DMSToDeg(false, 0, 16, 07.02),
base.DMSToDeg(false, 1, 01, 00.13),
base.DMSToDeg(false, 1, 45, 46.33),
}
d5, err := interp.NewLen5(x1, x5, yTable)
if err != nil {
fmt.Println(err)
return
}
z, err := d5.Zero(false)
if err != nil {
fmt.Println(err)
return
}
fmt.Printf("1988 January %.6f\n", z)
zInt, zFrac := math.Modf(z)
fmt.Printf("1988 January %d at %.62s TD\n", int(zInt),
base.NewFmtTime(zFrac*24*3600))
// compare result to that from just three central values
d3, err := interp.NewLen3(26, 28, yTable[1:4])
if err != nil {
fmt.Println(err)
return
}
z3, err := d3.Zero(false)
if err != nil {
fmt.Println(err)
return
}
dz := z - z3
fmt.Printf("%.6f day\n", dz)
fmt.Printf("%.1f minute\n", dz*24*60)
// Output:
// 1988 January 26.638587
// 1988 January 26 at 15ʰ20ᵐ TD
// 0.000753 day
// 1.1 minute
}
func ExampleDMSToDeg() {
// Example p. 7.
fmt.Printf("%.8f\n", base.DMSToDeg(false, 23, 26, 49))
// Output:
// 23.44694444
}