Function getIncrement

src/plots/cartesian/axis_autotype.js:85–87

(len)

// return increment to test at most 1000 points, evenly spaced
function getIncrement(len) {
    return Math.max(1, (len - 1) / 1000);
}

// are the (x,y)-values in gd.data mostly text?
// require twice as many DISTINCT categories as distinct numbers