def offsetToZero(requestContext, seriesList):
    for series in seriesList:
        series.name = "offsetToZero(%s)" % (series.name)
        minimum = safeMin(series)
        for i, value in enumerate(series):
            if value is not None:
                series[i] = value - minimum
    return seriesList
Offsets a metric or wildcard seriesList by subtracting the minimum
dataset/ETHPy150Open brutasse/graphite-api/graphite_api/functions.py/offsetToZero