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| author | Guilherme Andrade <[email protected]> | 2017-03-18 19:48:23 +0000 |
|---|---|---|
| committer | Guilherme Andrade <[email protected]> | 2017-04-20 21:30:53 +0100 |
| commit | dff85f3d6fdb4b3453d863bf9208073564a9fcf2 (patch) | |
| tree | 57bd88d6776d40a89ae975e7f3cb569d783c2154 /lib/stdlib/doc/src | |
| parent | 2cc47f22e4cb775422a6a7fb1b94836e7cf51143 (diff) | |
| download | otp-dff85f3d6fdb4b3453d863bf9208073564a9fcf2.tar.gz otp-dff85f3d6fdb4b3453d863bf9208073564a9fcf2.tar.bz2 otp-dff85f3d6fdb4b3453d863bf9208073564a9fcf2.zip | |
rand: Support arbitrary normal distributions
Diffstat (limited to 'lib/stdlib/doc/src')
| -rw-r--r-- | lib/stdlib/doc/src/rand.xml | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/lib/stdlib/doc/src/rand.xml b/lib/stdlib/doc/src/rand.xml index 8745e16908..3a5d18dc35 100644 --- a/lib/stdlib/doc/src/rand.xml +++ b/lib/stdlib/doc/src/rand.xml @@ -119,6 +119,11 @@ S0 = rand:seed_s(exsplus), <pre> {SND0, S2} = rand:normal_s(S1),</pre> + <p>Create a normal deviate with mean -3 and variance 0.5:</p> + + <pre> +{ND0, S3} = rand:normal_s(-3, 0.5, S2),</pre> + <note> <p>This random number generator is not cryptographically strong. If a strong cryptographic random number generator is @@ -201,6 +206,15 @@ S0 = rand:seed_s(exsplus), </func> <func> + <name name="normal" arity="2"/> + <fsummary>Return a normal distributed random float.</fsummary> + <desc> + <p>Returns a normal N(Mean, Variance) deviate float + and updates the state in the process dictionary.</p> + </desc> + </func> + + <func> <name name="normal_s" arity="1"/> <fsummary>Return a standard normal distributed random float.</fsummary> <desc> @@ -211,6 +225,15 @@ S0 = rand:seed_s(exsplus), </func> <func> + <name name="normal_s" arity="3"/> + <fsummary>Return a normal distributed random float.</fsummary> + <desc> + <p>Returns, for a specified state, a normal N(Mean, Variance) + deviate float and a new state.</p> + </desc> + </func> + + <func> <name name="seed" arity="1"/> <fsummary>Seed random number generator.</fsummary> <desc> |