()
| 829 | |
| 830 | @register('logistic') |
| 831 | def logistic_kernel(): |
| 832 | # 1.0 / (exp(t) + 2.0 + exp(-t)) |
| 833 | pdf = lambda t: 1/2 / (1.0 + cosh(t)) |
| 834 | cdf = lambda t: 1.0 - 1.0 / (exp(t) + 1.0) |
| 835 | invcdf = lambda p: log(p / (1.0 - p)) |
| 836 | support = None |
| 837 | return pdf, cdf, invcdf, support |
| 838 | |
| 839 | @register('sigmoid') |
| 840 | def sigmoid_kernel(): |
nothing calls this directly
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