diff options
Diffstat (limited to 'Doc/Zsh/mod_mathfunc.yo')
| -rw-r--r-- | Doc/Zsh/mod_mathfunc.yo | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/Doc/Zsh/mod_mathfunc.yo b/Doc/Zsh/mod_mathfunc.yo index 637c22d8f..dda4f36fd 100644 --- a/Doc/Zsh/mod_mathfunc.yo +++ b/Doc/Zsh/mod_mathfunc.yo @@ -8,7 +8,7 @@ mathematical functions for use when evaluating mathematical formulae. The syntax agrees with normal C and FORTRAN conventions, for example, -example((( f = sin(0.3) ))) +example((( f = sin+LPAR()0.3+RPAR() ))) assigns the sine of 0.3 to the parameter f. @@ -33,8 +33,8 @@ returns an integer. The function tt(signgam) takes no arguments, and returns an integer, which is the C variable of the same name, as described in manref(gamma)(3). Note that it is therefore only useful immediately after a call to tt(gamma) or -tt(lgamma). Note also that `tt(signgam())' and `tt(signgam)' are distinct -expressions. +tt(lgamma). Note also that `tt(signgam+LPAR()RPAR)' and `tt(signgam)' are +distinct expressions. The following functions take two floating point arguments: tt(copysign), tt(fmod), tt(hypot), tt(nextafter). @@ -58,7 +58,8 @@ has the function tt(erand48(3)). It returns a pseudo-random floating point number between 0 and 1. It takes a single string optional argument. If the argument is not present, the random number seed is initialised by -three calls to the tt(rand(3)) function --- this produces the same random +three calls to the tt(rand+LPAR()3+RPAR()) function --- this produces the +same random numbers as the next three values of tt($RANDOM). If the argument is present, it gives the name of a scalar parameter where @@ -80,7 +81,8 @@ print $(( rand48(seed) ))) Assuming tt($seed) does not exist, it will be initialised by the first call. In the second call, the default seed is initialised; note, however, -that because of the properties of tt(rand()) there is a correlation between +that because of the properties of tt(rand+LPAR()RPAR()) there is a +correlation between the seeds used for the two initialisations, so for more secure uses, you should generate your own 12-byte seed. The third call returns to the same sequence of random numbers used in the first call, unaffected by the |