Charm Dalitz analyzes from CLEO-c

I discuss CLEO-c opportunities in Dalitz plot analyzes with the data samples available now and projected by the end of CESR-c run. Using 281 pb$^{-1}$ of $e^+e^-$ collisions at mass of $\\psi(3770)$ we present results of the Dalitz plot analysis of $D^+ \\to \\pi^-\\pi^+\\pi^+$. Using the CLEO-c and CLEO III samples of 5 pb$^{-1}$, accrued at mass of $\\psi(2S)$, we study three body decays of $\\chi_{cJ}$ produced in the radiative decay $\\psi(2S) \\to \\gamma \\chi_{cJ}$, where $J$=0,1,2. A clear signal from at least one of $\\chi_{cJ}$ is found in eight final states: $\\pi^+\\pi^-\\eta$, $\\pi^+\\pi^-\\eta^\\prime$, $K^+K^-\\pi^0$, $K^0_S K \\pi$, $\\eta K^+K^-$, $\\pi^0 p\\bar{p}$, $\\eta p\\bar{p}$, and $\\Lambda K^+\\bar{p}$. For these modes we measured or set an upper limit on the branching fraction. A Dalitz plot analysis is performed on three modes $\\chi_{c1} \\to \\pi^+\\pi^-\\eta$, $K^+K^-\\pi^0$, and $K^0_S K \\pi$.