README for the subset of 205 genes in the yeast galactose data 
(Ideker et al. 2001)

Format:
- "gal205.txt" is a tab-delimited text file, which can be opened by any text
  editors, Excel or any other spreadsheet programs.
- There are a total of 205 rows (genes), 20 experiments, and 4 repeated
  measurements in the data. There are 4 classes (which correspond to
  functional categories).
- "gal205.txt" contains approximatly 8% of missing data.
- "knn12_gal205.txt" is a tab-delimited text file, which is the result of 
  applying k-nearest neighbor (k = 12) to impute all the missing values 
  in "gal205.txt". Hence, "knn12_gal205.txt", contains no missing data, 
  and is used to obtain the results described in the manuscript.
- Column 1: ORF name
  column 2: gene name
  column 3: class # (from 1 to 4)
  column 4-7: 4 repeated measurements for expt #1
  column 8-11: 4 repeated measurements for expt #2 etc.
- Functional categories of the 4 classes:
	class #		GO category
	1		biosynthesis; protein metabolism and modification
	2		energy pathways; carbohydrate metabolism; catabolism
	3		nucleobase, nucleoside, nucleotide and nucleic acide metabolism
	4		transport


Disclaimer:
Since array data may not fully reflect these functional categories, we 
recommend to use/interprete the classes information with caution.

Acknowledgement:
We would like to thank Vesteinn Thorsson from the Institute of Systems Biology
for the yeast galactose data set.