Unwrap Duplicate Spot Values from Rows into Columns
Reshape a matrix so that a set of consecutive rows becomes a single row in the output.
unwrapdups(M,ndups=2,spacing=1)
M |
a matrix. |
ndups |
number of duplicate spots. The number of rows of M must be divisible by |
spacing |
the spacing between the rows of |
This function is used on matrices corresponding to a series of microarray experiments. Rows corresponding to duplicate spots are re-arranged to that all values corresponding to a single gene are on the same row. This facilitates fitting models or computing statistics for each gene.
A matrix containing the same values as M but with fewer rows and more columns by a factor of ndups.
Each set of ndups rows in M is strung out to a single row so that duplicate values originally in consecutive rows in the same column are in consecutive columns in the output.
Gordon Smyth
M <- matrix(1:12,6,2) unwrapdups(M,ndups=2) unwrapdups(M,ndups=3) unwrapdups(M,ndups=2,spacing=3)
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