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counting minimizers exactly

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Heng Li
2020-03-25 09:50:32 -04:00
parent 3e897560c4
commit f8351e557a
2 changed files with 28 additions and 25 deletions
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hist.cpp
+5 -4
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@@ -14,13 +14,14 @@ static void yak_hist_line(int c, int x, int exceed, int64_t cnt)
int yak_analyze_count(int n_cnt, const int64_t *cnt, int *peak_het)
{
const int hist_max = 100;
int i, low_i, max_i, max2_i, max3_i;
int i, start, low_i, max_i, max2_i, max3_i;
int64_t max, max2, max3, min;
// find the low point from the left
*peak_het = -1;
low_i = 2;
for (i = 3; i < n_cnt; ++i)
start = cnt[1] > 0? 1 : 2;
low_i = start;
for (i = low_i + 1; i < n_cnt; ++i)
if (cnt[i] > cnt[i-1]) break;
low_i = i - 1;
fprintf(stderr, "[M::%s] lowest: count[%d] = %ld\n", __func__, low_i, (long)cnt[low_i]);
@@ -34,7 +35,7 @@ int yak_analyze_count(int n_cnt, const int64_t *cnt, int *peak_het)
fprintf(stderr, "[M::%s] highest: count[%d] = %ld\n", __func__, max_i, (long)cnt[max_i]);
// print histogram
for (i = 2; i < n_cnt; ++i) {
for (i = start; i < n_cnt; ++i) {
int x, exceed = 0;
x = (int)((double)hist_max * cnt[i] / cnt[max_i] + .499);
if (x > hist_max) exceed = 1, x = hist_max; // may happen if cnt[2] is higher