Description Usage Arguments Details Value See Also Examples
Takes a numeric vector and return an expression index (i.e., a sequence of 1,1, and 0)
1  index(x, cutoff)

x 
A numeric 
cutoff 
A numeric, dermine the threshold for indexing 
The function defines limits around the center (median or mean), +/ cutoff value in median absolute deviation (MAD) or standard deviation (SD) units respectively.The user defines a parameter cutoff that determines the limits around the geneexpression center. Then the function calculates the index value at each time point according to:
0: standardized value is within the limits (+/ cutoff)
1: standardized value exceeds the upper limit (+ cutoff)
1: standardized value exceeds the lower limit ( cutoff)
Gene expression index
1 2 3 4 5 6 7 8 
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