Gets summary information from map. Adapted from MAPpoly
map_summary(left.lim = 0, right.lim = 5, ch = 1, maps, d.p1, d.p2)
list with linkage map information: doses; number snps by group; cM per snp; map size; number of linkage groups
covered window in the linkage map start position
covered window in the linkage map end position
linkage group ID
list containing a vector for each linkage group markers with marker positions (named with marker names)
list containing a data.frame for each group with parent 1 dosages. The data.frame contain the columns: 1) character vector with chromosomes ID; 2) Character vector with markers ID; 3) Character vector with parent ID; 4) numerical vector with dosage
list containing a data.frame for each group with parent 2 dosages. See d.p1 parameter description