Subversion Repositories wimsdev

!if $wims_read_parm!=slib_header

!goto proc

!endif

slib_title=Probability density function of Poisson law

slib_parms=2\

,[data]\

1,p

slib_author=Bernadette PERRIN-RIOU

slib_out=values of the probability density function of the Poisson law of parameter p on data

slib_comment=data can be a list of reals

slib_example=[2,4,7],6.1

!exit

:proc

!distribute  item $wims_read_parm into slib_data,slib_p

!if  $slib_p<=0

slib_out=0

!exit

!endif

slib_data=!declosing $slib_data

slib_a=$[exp(-$slib_p)]

slib_out=!values  $slib_a * $slib_p^x/factorial(round(x)) for x in $slib_data

slib_out=!trim $slib_out

slib_cnt=!itemcnt $slib_data

!for slib_i=1 to $slib_cnt

	slib_tmp=!item $slib_i of $slib_data

	!if $[rint($slib_tmp)-$slib_tmp]<>0 or $slib_tmp < 0

		slib_out=!replace internal item number $slib_i by 0 in $slib_out

	!endif

!next slib_i

slib_out=!trim $slib_out