Displaying 2 results from an estimated 2 matches for "swap_tail".
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2008 Jul 14
0
swap_tail macro in pnorm.c
Hello,
Looking over the swap_tail macro in pnorm.c, the comment inside the code
indicates it is to swap the values of '*cum' and '*ccum'. According to the
code below that is taken from the source file, the swap functionality is
dependent on what values are provided for 'x' and 'lower'.
#define swap...
2003 Jul 24
0
Re: I am puzzled about something in pnorm in R (PR#3545)
...rrect. the routine only guarantees that one of cum or ccum has a
valid return value depending on i_tail (the other might as well be
garbage, but that isn't what's returned).
j
On Wed, 9 Jul 2003 Henrik.Seidel@schering.de wrote:
> Hello,
>
> I am a bit puzzled about the "swap_tail" macro in pnorm.c of the R sources.
> I cite:
>
> #define swap_tail \
> if (x > 0.) {/* swap ccum <--> cum */ \
> temp = *cum; if(lower) *cum = *ccum; *ccum = temp; \
> }
>
> It appears to me that ccum...