Table 1.

Missing values. Examples of missing value occurrences in different datasets from the yeast S. cerevisiae and human microarrays experiments. The year of publication, the studied organism, the number of genes on the DNA chip, the number of experimental conditions, the percentage of MVs and the percentage of genes with missing values are indicated.

Authors	Ref	Organism	Number of genes	Number of experimental conditions	Missing Values percentage (%)	genes with missing values (%)
Bohen et al. (2003)	[21]	human	16523	16	7.6	63.6
Sorlie et al. (2003)	[22]	human	552	122	6.2	94.7
Garber et al .(2001)	[23]	human	918	73	2.4	72.7
Alizadeh et al .(2000)	[24]	human	4026	96	5.3	78.8
Gasch et al. (2000)	[25]	yeast	6153	178	3.0	87.7
Ogawa et al. (2000)	[26]	yeast	6013	8	0.8	3.8
Ferrea et al. (1999)	[27]	yeast	5769	4	10.6	30.9
Spellman et al. (1998).	[28]	yeast	6178	77	5.9	91.8