cuffdiff: part of a cuffdiff analysis

Description Usage Format References

Description

This data set give the first 1000 lines of a RNA-Seq experiment in human B lymphoma cells. The cufflinks suite was used to assemble the transcripts and search for differenly expressed genes. For the identification of the transcripts and exons the Ensembl annotations were used.

Usage

1

Format

A data frame with 999 observations on the following 16 variables from a cuffdiff (V2.0) run:

test_id

A unique identifier describing the gene being tested.

gene_id

The gene_name or gene_id

gene

The gene_name(s) or gene_id(s) being tested

locus

Genomic coordinates for easy browsing to the genes or transcripts being tested.

sample_1

Label (or number if no labels provided) of the first sample being tested

sample_2

Label (or number if no labels provided) of the second sample being tested

status

Can be one of OK (test successful), NOTEST (not enough alignments for testing), LOWDATA (too complex or shallowly sequenced), HIDATA (too many fragments in locus), or FAIL, when an ill-conditioned covariance matrix or other numerical exception prevents testing.

value_1

FPKM of the gene in sample x

value_2

FPKM of the gene in sample y

log2.fold_change.

The (base 2) log of the fold change y/x

test_stat

The value of the test statistic used to compute significance of the observed change in FPKM

p_value

The uncorrected p-value of the test statistic

q_value

The FDR-adjusted p-value of the test statistic

significant

Can be either "yes" or "no", depending on whether p is greater then the FDR after Benjamini-Hochberg correction for multiple-testing

References

Cuffdiff Output:http://cufflinks.cbcb.umd.edu/manual.html#gene_exp_diff


psikon/cuffgo documentation built on May 26, 2019, 10:32 a.m.