All charts/Area & stream
Two years of listening
stream: the genres swell and shrink around a wandering middle, in smooth curves.
<?php
// Two years of listening, in hours per month: pop steady with a summer swell, rock
// fading, hip-hop rising, electronic peaking each summer, jazz and classical in winter.
$listening = [];
$months = [ 'Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec' ];
for ( $m = 0; $m < 24; $m++ ) {
$summer = cos ( ( $m % 12 - 6.5 ) / 12 * 2 * M_PI );
$winter = - $summer;
$listening [] = [
'month' => $months [$m % 12] . ' ' . ( 2025 + intdiv ( $m, 12 ) ),
'pop' => (int) round ( 42 + 10 * $summer + 4 * sin ( $m / 2 ) ),
'rock' => (int) round ( 38 - $m * 1.1 + 5 * sin ( $m / 3 + 1 ) ),
'hiphop' => (int) round ( 8 + $m * 1.6 + 3 * sin ( $m / 2.5 ) ),
'electronic' => (int) round ( 12 + 16 * max ( 0, $summer ) ** 2 ),
'jazz' => (int) round ( 9 + 7 * max ( 0, $winter ) ),
'classical' => (int) round ( 6 + 9 * max ( 0, $winter ) ** 3 + ( $m % 12 == 11 ? 8 : 0 ) ) ];
}
?>{chart 'stream', data='listening', label='month', value='pop, hiphop, rock, electronic, classical, jazz', title='Hours listened per genre, month by month', width=640, height=340}