This could result in a variable impact of background and noise on the expression value obtained for each probe set.

The pairwise similarities (correlation or distance) can be computed using these average expression values.

In particular the set of expression values is likely to be much restricted (perhaps allowing only the Boolean values 0 and 1).

Y'know one way you can look at this as a social glue, another expression value.

Extreme random regulation factors were limited so that the regulated gene expression values had the same range as baseline data.

An expression value will be derived per probe set as the result of analysis.

Generally, outliers result in expression values that are much larger than expected.

The detectable difference (δ) was the absolute, average changes in the expression values of the control group.

A mathematical classifier combines the measured expression values for each gene into a single value reported as a score between 0 and 40.

In addition, some procedures call for the elimination of all spots with an expression value below a certain intensity threshold.