Volcano plot (A) and scatter plot (B) of the miRNA microarray analysis.

<p>(A) Volcano plots are a useful tool for visualizing differential expression patterns between two conditions. The vertical lines correspond to 1.5-fold up- and down-regulation, and the horizontal line represents a p-value of 0.05. Thus, the red point in the plot represents the differentially expressed miRNAs that reached significance. (B) The scatter plot is a useful visualization for assessing the variation (or reproducibility) between chips. The axes of the scatter plot are the normalized signal values of the samples (the ratio scale).