The software also determines the features which should be kept in the analysis by flagging features that are significantly above background as determined by a two-sided t-test.
A probe or replicate was considered reliable if its raw foreground intensity was at least two times higher than the respective background intensity and if it was neither saturated nor flagged by the Feature Extraction software.
These multiple data sets were flagged, fitting all the features: spot Dia.
We collected transcripts with Ensembl, Genbank, Entrez or Refseq identifiers and selected probes with a reliable signal-to-noise ratio in more than 2/3 of the arrays (noted by a "P-flag" in the Feature extraction output).
miRNAs flagged as absent by the Feature Extraction Software in more than 50% of the samples in each of the 4 conditions were excluded from the results.
Probes which were flagged as outliers by the Feature Extraction software or were present in less than 30% of the samples, were removed.
A single array was excluded from the analysis as it was flagged as sub-standard by the feature extraction software and also appeared as a clear outlier on a Principal Component Analysis performed within Genespring in order to compare arrays.
The microarray reference dataset comprised all genes that were flagged as present or marginal by the feature extraction software (GeneSpring, Agilent) for 6/6 microarrays.
Aside from some eye-catching colors, other features flagged by the world's third largest smartphone maker during its press conference here at Mobile World Congress in Barcelona included camera tech, with Huawei continuing to lean on a Leica-branded partnership that lets users do things like style photos to have a Leica-ish film look.
Microarray features flagged by the Genepix software, designated as empty (no oligo probe), not in genome, negative control, positive control, plastid genome, unmapped, or mapping to non-mRNA were given zero weight for normalization using the modifyWeights function in limma.
