Introduction:

This tool takes a peak table file as input and performs z-score transformation on the peaks. This method standardizes the data by mean and standard deviation of the original data. It is applicable to the cases where the maximum and minimum values are unknown, or there is outlier data beyond the range of values. Formula is new data = (original data - mean)/standard deviation.

Input files:

Peak table file in Tab-delimited txt format, with the first column as the compound identifier and others as samples.

For example:

AlignID	STDmix_GC_01	STDmix_GC_02	STDmix_GC_03
1	1486892478	561322777	3448620272
Nitrogen dioxide	5492977592	684434115	3265669981
Ethanol, 2-fluoro-	2265686433	4182838129	4365291513
3-Pentanone, 2,2,4,4-tetramethyl-	13390154	12612932	21155307
Hydrazine	14588107	8510918	7224351

Output files:

'zscore_transformed_pkTable.txt', zscore transformed peak table file in Tab-delimited txt format.