Criteria for exclusion during GSE processing

[mdozmorov]

Exclude GSM, if,
• mean or median equal to 0 (weird distribution, suspects for ratio)
• mean to median ratio equal to or less than 1.2 (suspects for ratio)
• negative values present
Consider:
• Mean =>7 and <=16 – need to be unlog2 transformed
• >1% missing should be done AFTER removing genes appearing in 0 experiments

[gilesc]

log2 transform and ALL values must be negative fixed: e6b06da

Exclude 1% missing still needs to be done (and is of course only applicable to platform-specific matrices)