The stability package provides functionalities to perform Stability Analysis of Genotype by Environment Interaction (GEI) to identify superior and stable genotypes under diverse environments. It performs Eberhart & Russel's ANOVA (1966), Finlay and Wilkinson (1963) Joint Linear Regression, Wricke (1962, 1964) Ecovalence, Shukla's stability variance parameter (1972) and Kang's (1991) simultaneous selection for high yielding and stable parameter.