feat(admin): 新增尾首概率分析弹窗
在history页面工具栏添加"尾首概率"按钮,弹窗显示: - 下一期尾数与前一期尾数相同的概率 - 下一期首位与前一期首位相同的概率 支持切换统计期数(30/50/100/200期)
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@@ -984,6 +984,60 @@ class History extends Model
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];
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}
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/**
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* 尾首概率:下一期尾数/首位与前一期相同的概率
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* 统计相邻两期特码的尾数(num%10)和首位(floor(num/10))变化
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* @param int $periods 查询最近多少期
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* @return array {tailProb: float, headProb: float, totalTransitions: int, periodCount: int}
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*/
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public function getTailHeadProbability($periods = 100)
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{
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$history = $this
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->field('expect,num7,openTime')
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->order('openTime', 'desc')
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->limit($periods)
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->select();
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if (empty($history) || count($history) < 2) {
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return ['tailProb' => 0, 'headProb' => 0, 'totalTransitions' => 0, 'periodCount' => 0];
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}
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// 按时间升序排列(旧→新)
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$history = array_reverse($history);
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$tailSame = 0;
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$headSame = 0;
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$totalTransitions = 0;
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for ($i = 0; $i < count($history) - 1; $i++) {
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$currentNum = (int)$history[$i]['num7'];
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$nextNum = (int)$history[$i + 1]['num7'];
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if ($currentNum < 1 || $currentNum > 49 || $nextNum < 1 || $nextNum > 49) {
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continue;
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}
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$totalTransitions++;
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// 尾数相同(个位相同)
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if (($currentNum % 10) === ($nextNum % 10)) {
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$tailSame++;
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}
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// 首位相同(十位相同)
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if (intval(floor($currentNum / 10)) === intval(floor($nextNum / 10))) {
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$headSame++;
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}
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}
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return [
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'tailProb' => $totalTransitions > 0 ? round($tailSame / $totalTransitions * 100, 2) : 0,
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'headProb' => $totalTransitions > 0 ? round($headSame / $totalTransitions * 100, 2) : 0,
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'totalTransitions' => $totalTransitions,
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'periodCount' => count($history)
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];
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}
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/**
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* 区域→区域转移矩阵,单元格内显示波色概率
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* 统计上一期特码所在区域后,下一期特码在各区域的分布,以及每个区域内的波色占比
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