Total number of sequencing reads from raw fastq file
Percentage of reads uniquely mapped to the reference genome.
Percentage of reads mapped equally well to multiple locations on the reference genome.
Percentage of reads not mapped to the reference genome.
Number of uniquely mapped reads.
Percentage of reads mapped to unique gene region, including Exons, UTRs and Introns.
Percentage of reads mapped to gene-overlapping region and can't be unambiguously assigned to either gene.
Percentage of reads mapped to unannotated genomic regions.
Total number of tags (reads, one paired-end read counted as two reads)
Percentage of mapped reads on Exons.
Percentage of mapped reads on 5' UTR.
Percentage of mapped reads on 3' UTR.
Percentage of mapped reads on Introns.
Percentage of mapped reads on Intergenic regions.
Reads counted by featureCounts (=uniquely mapped read * uniq_rate)
Normalization factor calculated by edgeR
Average correlation where this sample is involved
Avg_Corr : Average correlation where this sample is involved;
Avg_Rest : Average correlation where this sample is NOT involved;
Corr_diff : The difference between Avg_Corr and Avg_Rest.
(1) For each sample, calculate the correlation difference. This is simply a difference between the average of all the pair wise correlations that involve the sample (for the same group) and the average of all the pair wise correlations that do not involve the sample. For example, if we have a, b, c, d for group 1, the correlation difference of sample a is:
The difference of Average (correlation(a, b), correlation(a, c), correlation(a, d)) and Average (correlation(b, c), correlation (b, d), correlation(c, d)). You can see that if sample a is an outlier, then the difference will be negative.
(2) Now we have a vector of values (one for each sample). We simply convert this vector to MAD scores (robust Z-scores) by subtracting the medians then dividing it by median absolute deviations (MAD). We use a standard MAD cutoff (e.g. -5) to determine the outliers.
Search: | Right click on a column header to show the explanation. |