🌿 茎叶图生成器Stem and Leaf Plot Calculator

使用说明与常见问题How-to & FAQ

「茎叶图生成器」是什么？What is the Stem and Leaf Plot Calculator tool?

把一组数据整理成茎叶图：自动或手动选择叶单位，可拆分茎（每个茎分两行），支持负数和小数，并给出个数、最小值、最大值、中位数和众数。Turn a list of numbers into a stem-and-leaf plot, with an automatic or chosen leaf unit, optional split stems (two lines per stem), support for negatives and decimals, and the count, minimum, maximum, median and mode.

如何使用「茎叶图生成器」？How do I use the Stem and Leaf Plot Calculator tool?

在「茎叶图生成器」中，填写「叶单位」、「拆分茎」等参数，结果会随输入实时计算并显示在下方。In the Stem and Leaf Plot Calculator: Fill in "Leaf unit", "Split stems"; results are recalculated instantly as you type.

茎叶图怎么看？How do I read a stem-and-leaf plot?

竖线左边是茎（十位及以上的数字），右边每个数字是一片叶（个位）。例如「3 | 0 5 8」表示 30、35、38。它既像横放的直方图，能看出分布形状，又保留了每个原始数值。The stem left of the bar holds the tens and higher digits, and each digit on the right is a leaf (the units). '3 | 0 5 8' means 30, 35 and 38. It shows the shape of the distribution like a sideways histogram while keeping every value.

叶单位是什么？What is the leaf unit?

叶单位决定叶代表哪一位。叶单位 1 时 4 | 1 = 41；叶单位 0.1 时 4 | 8 = 4.8；叶单位 10 时 7 | 9 = 790。自动模式按数据范围选取，使茎的数量适中；数值会先四舍五入到叶单位。The leaf unit says which digit a leaf stands for. With leaf unit 1, 4 | 1 = 41; with 0.1, 4 | 8 = 4.8; with 10, 7 | 9 = 790. Automatic mode picks it from the data's range to keep a sensible number of stems, and values are rounded to the leaf unit first.

负数和拆分茎怎么处理？How are negatives and split stems handled?

负数的茎带负号，-0 单独一行，用于 -0.1 到 -9 这样的值，例如 -0 | 3 表示 -3。拆分茎把每个茎分成两行：「.」行放叶 0–4，「*」行放叶 5–9，适合数据集中在少数几个茎时。Negative stems carry a minus sign, with a separate -0 stem for values such as -3 (-0 | 3). Split stems put each stem on two lines — '.' for leaves 0–4 and '*' for 5–9 — which helps when the data bunch onto a few stems.

计算精度如何？How precise are the results?

「茎叶图生成器」使用 JavaScript 双精度浮点数（约 15–16 位有效数字）；极大或极小的数值可能存在精度误差。The Stem and Leaf Plot Calculator uses double-precision floating point (about 15–16 significant digits); very large or very small values may lose precision.

「茎叶图生成器」免费吗？需要注册吗？Is the Stem and Leaf Plot Calculator free? Do I need an account?

「茎叶图生成器」完全免费，无需注册或安装，打开网页即可使用，手机和电脑都能用；输入的内容只在你的浏览器本地处理。The Stem and Leaf Plot Calculator is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.