Normalize Columns of a Matrix to have the Median Absolute Value
标准化矩阵的列有中位数的绝对值
译者:生物统计家园网 机器人LoveR
描述----------Description----------
Performs scale normalization of an M-value matrix or an A-value matrix across a series of arrays. Users do not normally need to call these functions directly - use normalizeBetweenArrays instead.
执行一个M值矩阵或跨系列阵列A值矩阵规模标准化。用户通常并不需要直接调用这些功能 - 使用normalizeBetweenArrays代替。
If x is a matrix of log-ratios of expression (M-values) then normalizeMedianAbsValues is very similar to scaling to equalize the median absolute deviation (MAD) as in Yang et al (2001, 2002). Here the median-absolute value is used for preference to as to not re-center the M-values.
如果x是一个矩阵表达log率(M值),然后normalizeMedianAbsValues是非常相似,缩放,杨等人在均衡中位数绝对偏差(MAD)(2001年,2002年) 。在这里,中位数的绝对值用于优先不重新中心的M值。
normalizeMedianAbsValues is also used to scale the A-values when scale-normalization is applied to an MAList object.
normalizeMedianAbsValues也被用来扩大规模标准化时的A值MAList对象。
值----------Value----------
A numeric matrix of the same size as that input which has been scaled so that each column has the same median value (for normalizeMedianValues) or median-absolute value (for normalizeMedianAbsValues).
一个数字矩阵的大小相同,输入已缩放,使每列具有相同的中值(normalizeMedianValues)或中位数的绝对值(normalizeMedianAbsValues)。
作者(S)----------Author(s)----------
Gordon Smyth
参见----------See Also----------
An overview of LIMMA functions for normalization is given in 05.Normalization.
在05.Normalization标准化LIMMA功能概述。
举例----------Examples----------
M <- cbind(Array1=rnorm(10),Array2=2*rnorm(10))
normalizeMedianAbsValues(M)