PIXLRT is a package can be used for the analysis of(non pseudo-autosomal) SNPs on the X chromosome in case-parent triads. The package can read genotypes in pedigree file format or matrices with number of minor allele copies for each of the mother, father, and affected offspring. The parent-informed X chromosome likelihood ratio test (PIX-LRT) is then used to analyze the data. (Reference: Wise A.S., et al...TBD). There is a readme file "Readme PIX.txt" that contains detailed installation information.