Averages/Mean time of day: Difference between revisions
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The mean time is : 23:47:43</pre>
=={{header|Vlang}}==
{{trans|Wren}}
<lang vlang>import math
const inputs = ["23:00:17", "23:40:20", "00:12:45", "00:17:19"]
fn main() {
angles := inputs.map(time_to_degs(it))
println('Mean time of day is: ${degs_to_time(mean_angle(angles))}')
}
fn mean_angle(angles []f64) f64 {
n := angles.len
mut sin_sum := f64(0)
mut cos_sum := f64(0)
for angle in angles {
sin_sum += math.sin(angle * math.pi / 180)
cos_sum += math.cos(angle * math.pi / 180)
}
return math.atan2(sin_sum/n, cos_sum/n) * 180 / math.pi
}
fn degs_to_time(dd f64) string{
mut d := dd
for d < 0 {
d += 360
}
mut s := math.round(d * 240)
h := math.floor(s/3600)
mut m := math.fmod(s, 3600)
s = math.fmod(m, 60)
m = math.floor(m / 60)
return "${h:02}:${m:02}:${s:02}"
}
fn time_to_degs(time string) f64 {
t := time.split(":")
h := t[0].f64() * 3600
m := t[1].f64() * 60
s := t[2].f64()
return (h + m + s) / 240
}</lang>
{{out}}
<pre>
Mean time of day is: 23:47:43
</pre>
=={{header|Wren}}==
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