TABLE 1.

Notations used in this paper.

Notation	Description
D	input data matrix of M rows and N columns
κ	number of row clusters
ℓ	number of column clusters
ρ	mapping of row clusters
γ	mapping of column clusters
K	number of optimized co-clusters
X	Co-cluster of |I| rows and |J| columns
I	set of rows in co-cluster X
J	set of columns in co-cluster X
xj	the jth column in row x
|.|	the cardinality function
Notations for discriminative co-clustering
NA	No. of columns in class A
KA	number of optimized co-clusters in class A
$c_j^A$	jth column in class A, 1 ≤ j ≤ |NA|
$X_k^A.r\left(i\right)$	ith row of the kth co-cluster in class A
$X_k^B.c\left(j\right)$	jth column of the kth co-cluster in class B