<s>
igraph	B-Language
is	O
a	O
library	O
collection	O
for	O
creating	O
and	O
manipulating	O
graphs	O
and	O
analyzing	O
networks	O
.	O
</s>
<s>
It	O
is	O
written	O
in	O
C	B-Language
and	O
also	O
exists	O
as	O
Python	B-Language
and	O
R	B-Language
packages	O
.	O
</s>
<s>
There	O
exists	O
moreover	O
an	O
interface	O
for	O
Mathematica	B-Language
.	O
</s>
<s>
The	O
publication	O
that	O
introduces	O
the	O
software	O
has	O
5623	O
citations	O
as	O
of	O
according	O
to	O
Google	B-Library
Scholar	I-Library
.	O
</s>
<s>
igraph	B-Language
was	O
originally	O
developed	O
by	O
Gábor	O
Csárdi	O
and	O
Tamás	O
Nepusz	O
.	O
</s>
<s>
It	O
is	O
written	O
in	O
the	O
C	B-Language
programming	I-Language
language	I-Language
in	O
order	O
to	O
achieve	O
good	O
performance	O
and	O
it	O
is	O
freely	O
available	O
under	O
GNU	O
General	O
Public	O
License	O
Version	O
2	O
.	O
</s>
<s>
The	O
three	O
most	O
important	O
properties	O
of	O
igraph	B-Language
that	O
shaped	O
its	O
development	O
are	O
as	O
follows	O
:	O
</s>
<s>
The	O
software	O
is	O
open	B-Application
source	I-Application
,	O
source	O
code	O
can	O
be	O
downloaded	O
from	O
the	O
project	O
's	O
GitHub	B-Application
page	O
.	O
</s>
<s>
There	O
are	O
several	O
open	B-Application
source	I-Application
software	I-Application
packages	O
that	O
use	O
igraph	B-Language
functions	O
.	O
</s>
<s>
As	O
an	O
example	O
,	O
R	B-Language
packages	O
tnet	O
,	O
igraphtosonia	O
and	O
cccd	O
depend	O
on	O
igraph	B-Language
R	B-Language
package	O
.	O
</s>
<s>
Users	O
can	O
use	O
igraph	B-Language
on	O
many	O
operating	O
systems	O
.	O
</s>
<s>
The	O
C	B-Language
library	O
and	O
R	B-Language
and	O
Python	B-Language
packages	O
need	O
the	O
respective	O
software	O
,	O
otherwise	O
igraph	B-Language
is	O
portable	O
.	O
</s>
<s>
igraph	B-Language
can	O
be	O
used	O
to	O
generate	O
graphs	O
,	O
compute	O
centrality	O
measures	O
and	O
path	O
length	O
based	O
properties	O
as	O
well	O
as	O
graph	O
components	O
and	O
graph	O
motifs	O
.	O
</s>
<s>
igraph	B-Language
can	O
read	O
and	O
write	O
Pajek	B-Application
and	O
GraphML	B-Language
files	O
,	O
as	O
well	O
as	O
simple	O
edge	O
lists	O
.	O
</s>
