separated positive and negative values. fixed finding maxes and mins
separated positive and negative values. fixed finding maxes and mins

hms-dbmi/4DN_matrix-viewer,hms-dbmi/4DN_matrix-viewer,hms-dbmi/higlass,hms-dbmi/4DN_matrix-viewer,hms-dbmi/higlass,hms-dbmi/higlass,hms-dbmi/higlass