We defined an edge between any two genes if they shared a correlation (Pearson's r) in gene expression of 0.8 or greater across the set of more than 300 experiments (a threshold of 0.75 produced similar results; data not shown).
On the other hand, due to the mathematical properties of partial correlation coefficients negative partial correlation coefficients occur whenever two metabolites A and B have a strong correlation with a third metabolite C, but do not share a high correlation value with each other.
In the post-monsoon session, fluoride is observed to share a positive correlation with pH (r = 0.41), total alkalinity (r = 0.38), sodium (r = 0.46), carbonate and bicarbonate (r > 0.2).
Since some recent studies [ 14] have shown that miRNAs and their target mRNAs do not always share a negative correlation, a measure of association that incorporates both directions of change is desirable.
Our risk factor model, which assumes that multiple events within households share a common correlation across time, may be strong for longitudinal data, although for more limited risk periods and conditions of intense, close contact, the approach may be plausible.
It was unexpected that the percentage change in peak VO2 would share a low correlation with the SGA, and it may reflect influence by factors associated with child and parental-proxy responses and with instrument administration.
Spalax share a positive correlation of genetic polymorphisms with aridity stress (Nevo et al. 1996 and supplementary fig. 1d) as well as many other diverse taxa in Israel across phylogeny (Nevo and Beiles 1988 and supplementary fig. 1e); the higher the stress the higher the genetic polymorphism in S. ehrenbergi superspecies (in Israel).
Iron shares a strong correlation with hardness (r = 0.65) as opposed to that during post-monsoon.
Such a pattern is observed in the study area during pre-monsoon session, when iron shares a strong correlation with total hardness and calcium which is reflected in the pre-monsoon dendrogram as well, where iron is clustered with parameters defining the hardness character of groundwater.
Item discriminant validity requires that each of the items shares a higher correlation with its own dimension than with other dimensions [ 29].
