Function visitPoints

docs/app/js/sanddance-app.js:119660–119667

(data, x, y, callback)

    ];
}
function visitPoints(data, x, y, callback) {
    let i = -1, u, v;
    for (const d of data){
        u = x(d);
        v = y(d);
        if (u != null && (u = +u) >= u && v != null && (v = +v) >= v) callback(u, v, ++i);
    }
}
// License: https://github.com/HarryStevens/d3-regression/blob/master/LICENSE
function rSquared(data, x, y, uY, predict) {
    let SSE = 0, SST = 0;