diff options
Diffstat (limited to 'lib/stdlib/doc/src/rand.xml')
| -rw-r--r-- | lib/stdlib/doc/src/rand.xml | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/lib/stdlib/doc/src/rand.xml b/lib/stdlib/doc/src/rand.xml index 470dc4da97..e06d7e467d 100644 --- a/lib/stdlib/doc/src/rand.xml +++ b/lib/stdlib/doc/src/rand.xml @@ -4,7 +4,7 @@ <erlref> <header> <copyright> - <year>2015</year><year>2016</year> + <year>2015</year><year>2017</year> <holder>Ericsson AB. All Rights Reserved.</holder> </copyright> <legalnotice> @@ -166,6 +166,11 @@ S0 = rand:seed_s(exrop), <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>The builtin random number generator algorithms are not cryptographically strong. If a cryptographically strong @@ -308,6 +313,15 @@ tests. We suggest to use a sign test to extract a random Boolean value.</pre> </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> @@ -318,6 +332,15 @@ tests. We suggest to use a sign test to extract a random Boolean value.</pre> </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> |