forked from personal/squiggle.c
formatting pass.
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squiggle.c
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squiggle.c
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@ -35,11 +35,11 @@ uint64_t xorshift64(uint64_t* seed)
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// https://en.wikipedia.org/wiki/Xorshift
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// Also some drama: <https://www.pcg-random.org/posts/on-vignas-pcg-critique.html>, <https://prng.di.unimi.it/>
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uint64_t x = *seed;
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x ^= x << 13;
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x ^= x >> 7;
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x ^= x << 17;
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return *seed = x;
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uint64_t x = *seed;
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x ^= x << 13;
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x ^= x >> 7;
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x ^= x << 17;
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return *seed = x;
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}
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// Distribution & sampling functions
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@ -70,9 +70,9 @@ double sample_normal(double mean, double sigma, uint64_t* seed)
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return (mean + sigma * sample_unit_normal(seed));
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}
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double sample_lognormal(double logmean, double logsigma, uint64_t* seed)
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double sample_lognormal(double logmean, double logstd, uint64_t* seed)
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{
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return expf(sample_normal(logmean, logsigma, seed));
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return exp(sample_normal(logmean, logstd, seed));
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}
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double sample_to(double low, double high, uint64_t* seed)
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@ -84,8 +84,8 @@ double sample_to(double low, double high, uint64_t* seed)
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double loglow = logf(low);
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double loghigh = logf(high);
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double logmean = (loglow + loghigh) / 2;
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double logsigma = (loghigh - loglow) / (2.0 * NORMAL95CONFIDENCE);
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return sample_lognormal(logmean, logsigma, seed);
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double logstd = (loghigh - loglow) / (2.0 * NORMAL95CONFIDENCE);
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return sample_lognormal(logmean, logstd, seed);
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}
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double sample_gamma(double alpha, uint64_t* seed)
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