<s>
In	O
data	B-Application
visualization	I-Application
,	O
an	O
Andrews	B-Application
plot	I-Application
or	O
Andrews	B-Application
curve	I-Application
is	O
a	O
way	O
to	O
visualize	O
structure	O
in	O
high-dimensional	O
data	O
.	O
</s>
<s>
It	O
is	O
basically	O
a	O
rolled-down	O
,	O
non-integer	O
version	O
of	O
the	O
Kent	O
–	O
Kiviat	O
radar	B-Application
m	I-Application
chart	I-Application
,	O
or	O
a	O
smoothed	O
version	O
of	O
a	O
parallel	B-Application
coordinate	I-Application
plot	I-Application
.	O
</s>
<s>
To	O
visualize	O
them	O
,	O
the	O
Andrews	B-Application
plot	I-Application
defines	O
a	O
finite	O
Fourier	O
series	O
:	O
</s>
<s>
If	O
there	O
is	O
structure	O
in	O
the	O
data	O
,	O
it	O
may	O
be	O
visible	O
in	O
the	O
Andrews	B-Application
curves	I-Application
of	O
the	O
data	O
.	O
</s>
<s>
Some	O
of	O
their	O
uses	O
include	O
the	O
quality	O
control	O
of	O
products	O
,	O
the	O
detection	O
of	O
period	O
and	O
outliers	O
in	O
time	O
series	O
,	O
the	O
visualization	O
of	O
learning	O
in	O
artificial	B-Architecture
neural	I-Architecture
networks	I-Architecture
,	O
and	O
correspondence	O
analysis	O
.	O
</s>
<s>
The	O
projection	O
onto	O
the	O
circle	O
results	O
in	O
the	O
aforementioned	O
radar	B-Application
chart	I-Application
.	O
</s>
