I have been trying to get miRNAs that are co-expressed with the genes. I computed the correlation matrix between the the two based on their expression. Now I would like to visualize their relationship. Is there any way to visualize the correlation matrix? In addition to that, I also built a network in ARACNE algorithm with the rows of gene names and columns of miRNA names and I tried to use "Rgraphviz" package, but I got an error saying the column names and row names of the network should be the same. Can I also get some help regarding this? Thank you!