In the Circos plot, the heatmap is distorted by extreme values by certain genes. I am inquiring whether the heatmap can be applied independently to each gene that will allow me to view the gene expression between each experiment groups for every gene.

 par(mar=c(2, 2, 2, 2));

 plot(c(1,800), c(1,800), type="n", axes=F, xlab="", ylab="", main="");

circos(R=300, cir=db, W=4,   type="chr", print.chr.lab=T, col=cols);
circos(R=110, cir=db, W=200, mapping=gene.expression,  col.v=4,  type="heatmap2", col.bar=T, lwd=1);
circos(R=310, cir=db, W=20,  mapping=gene.expression, type="label", side="out", col="black");