Lua分段统计：数值落桶的人数分布

-- 错误：逐段循环数每桶，段多一遍遍跑
for seg = 0, 9 do
    for _, v in ipairs(values) do
        if v >= seg * 100 and v < (seg + 1) * 100 then
            cnt[seg] = cnt[seg] + 1
        end
    end
end

local function hist(values, width)
    local buckets = {}
    for _, v in ipairs(values) do
        local b = math.floor(v / width)
        buckets[b] = (buckets[b] or 0) + 1
    end
    return buckets
end
local h = hist({12, 45, 130, 145, 260}, 100)
local label = panel:getChildByName("histText")
label:setString(h[0] .. "/" .. h[1] .. "/" .. h[2])