Function zoomPow

docs/app/js/sanddance-app.js:106719–106721

(domain, anchor, scale, exponent)

    return zoom(domain, anchor, scale, log(sign), exp(sign));
}
function zoomPow(domain, anchor, scale, exponent) {
    return zoom(domain, anchor, scale, pow(exponent), pow(1 / exponent));
}
function zoomSymlog(domain, anchor, scale, constant2) {
    return zoom(domain, anchor, scale, symlog(constant2), symexp(constant2));
}