"DiagnosticOn"@en . . . . "! This article is a stub. Please help the TI-BASIC Wiki by [ expanding it] :DiagnosticOn This command causes to start calculating r and r2 values. DiagnosticOff is the inverse of this."@en . . . "! This article is a stub. Please help the TI-BASIC Wiki by [ expanding it] :DiagnosticOn This command causes to start calculating r and r2 values. DiagnosticOff is the inverse of this."@en .