This R code in this package is distributed under the GPL-3 license. It is free, open source, and has the following attribution requirements (GPL Section 7): (a) you agree to retain in 'ndtv' and any modifications to 'ndtv' the copyright, author attribution and URL information as provided at https://statnet.org/attribution (b) you agree that 'ndtv' and any modifications to 'ndtv' will, when used, display the attribution: Based on 'statnet' project software (https://statnet.org). For license and citation information see https://statnet.org/attribution