<s>
Many	O
statistical	O
and	O
data	O
processing	O
systems	O
have	O
functions	O
to	O
convert	O
between	O
these	O
two	O
presentations	O
,	O
for	O
instance	O
the	O
R	B-Language
programming	I-Language
language	I-Language
has	O
several	O
packages	O
such	O
as	O
the	O
package	O
.	O
</s>
