Cuddy-Della Valle Index for Capturing the Instability in Time Series Data R package CDVI version 0.1.0 Cuddy-Della valle index gives the degree of instability present in the data by accommodating the effect of a trend. The adjusted R squared value of the best fitted model is chosen. The index is obtained by multiplying the coefficient of variation with square root of one minus the adjusted R-squared value. This package has been developed using concept of Shankar et al. (2022)<doi:10.3389/fsufs.2023.1208898>. Software Imports: stats, base Dr. S. Vishnu Shankar <S.vishnushankar55@gmail.com> Comprehensive R Archive Network (CRAN) Dr. S. Vishnu Shankar [aut, cre], Dr. Ranjit Kumar Paul [aut], Dr. Md Yeasin [aut], Dr. Himadri Shekhar Roy [aut] GPL-3 2024-04-04 application/tgz https://CRAN.R-project.org/package=CDVI doi:10.32614/CRAN.package.CDVI