柱状图

Content 约束

数据点 ≤ 12
同一数据系列用同一颜色（不要每个柱不同色）
Y 轴必须有单位标注（如 "万元"、"人次"）

Layout 选型

脚本生成坐标（推荐）：用 .cjs 脚本计算柱体位置和高度，脚本输出 JSON 文件后调用 npx -y @larksuite/whiteboard-cli@^0.2.0 渲染
绝对定位手写：简单柱状图（≤ 5 个柱）可手写坐标

Layout 规则

白板坐标系 Y 轴向下为正，图表"底部原点"拥有最大 Y 值，柱体向上生长时 Y 减小
柱体等宽等间距，底部对齐 X 轴
柱体高度：height = (value / maxValue) * chartHeight
柱体 Y 坐标：y = originY - height
坐标轴用 connector 直线，末端带箭头（endArrow: "arrow"）
格线用虚线 connector（lineStyle: "dashed"，endArrow: "none"）
刻度线短横线 connector（endArrow: "none"）
数值标注放在柱体顶部上方
类别标签放在 X 轴下方，居中对齐柱体

坐标与尺寸计算指南

白板坐标系中，X 轴向右为正，Y 轴向下为正。因此图表的"底部原点"实际上拥有最大的 Y 坐标，图形向上生长时 Y 坐标在不断减小。

确定图表区域：
- 设定图表区高度 chartHeight 和宽度 chartWidth
- 设定左下角坐标原点 (originX, originY)
- 示例：originX=80, originY=480, chartWidth=1000, chartHeight=400
Y 轴映射（计算高度）：
- 找出数据的最大值 maxValue
- 将 maxValue 向上取整到"整数刻度"（如数据最大 190 → maxValue 取 200）
- 柱子高度：height = (value / maxValue) * chartHeight
- 柱子 Y 坐标：y = originY - height
X 轴映射（计算宽度与 X 坐标）：
- 将 chartWidth 按数据个数均分：slotWidth = chartWidth / barCount
- 设定柱子间距 barGap（推荐 slotWidth 的 25%-30%）
- 柱子宽度：barWidth = slotWidth - barGap
- 第 i 根柱子 X 坐标：x = originX + i * slotWidth + barGap / 2
Y 轴刻度计算：
- 将 0 到 maxValue 等分为 4-6 个刻度
- 每个刻度的 Y 坐标：gridY = originY - (tickValue / maxValue) * chartHeight
- 刻度线：从 (originX-10, gridY) 到 (originX, gridY) 的短横线
- 网格线：从 (originX, gridY) 到 (originX+chartWidth, gridY) 的虚线

完整 JSON 示例

以下示例：3 根柱子，数据 [120, 200, 150]，maxValue=200，originX=80, originY=480, chartWidth=900, chartHeight=400。

slotWidth = 900 / 3 = 300
barGap = 80, barWidth = 220

刻度：0, 50, 100, 150, 200（每 50 一格，gridInterval = 80px）

{
"version": 2,
"nodes": [
{ "type": "rect", "x": 0, "y": 0, "width": 1100, "height": 580 },

{ "type": "text", "x": 80, "y": 10, "width": 900, "height": "fit-content",
  "text": "季度销售额对比", "fontSize": 24, "textAlign": "center" },

{ "type": "text", "x": 10, "y": 40, "width": 60, "height": "fit-content",
  "text": "万元", "fontSize": 12, "textAlign": "center" },

{ "type": "connector", "connector": {
  "from": { "x": 80, "y": 480 }, "to": { "x": 80, "y": 55 },
  "lineShape": "straight", "lineWidth": 2, "endArrow": "arrow"
}},
{ "type": "connector", "connector": {
  "from": { "x": 80, "y": 480 }, "to": { "x": 1000, "y": 480 },
  "lineShape": "straight", "lineWidth": 2, "endArrow": "arrow"
}},

{ "type": "connector", "connector": {
  "from": { "x": 70, "y": 480 }, "to": { "x": 80, "y": 480 },
  "lineShape": "straight", "lineWidth": 1,
  "startArrow": "none", "endArrow": "none"
}},
{ "type": "text", "x": 20, "y": 470, "width": 50, "height": 20,
  "text": "0", "fontSize": 12, "textAlign": "right" },

{ "type": "connector", "connector": {
  "from": { "x": 70, "y": 400 }, "to": { "x": 80, "y": 400 },
  "lineShape": "straight", "lineWidth": 1,
  "startArrow": "none", "endArrow": "none"
}},
{ "type": "text", "x": 20, "y": 390, "width": 50, "height": 20,
  "text": "50", "fontSize": 12, "textAlign": "right" },
{ "type": "connector", "connector": {
  "from": { "x": 80, "y": 400 }, "to": { "x": 980, "y": 400 },
  "lineShape": "straight", "lineWidth": 1, "lineStyle": "dashed",
  "startArrow": "none", "endArrow": "none"
}},

{ "type": "connector", "connector": {
  "from": { "x": 70, "y": 320 }, "to": { "x": 80, "y": 320 },
  "lineShape": "straight", "lineWidth": 1,
  "startArrow": "none", "endArrow": "none"
}},
{ "type": "text", "x": 20, "y": 310, "width": 50, "height": 20,
  "text": "100", "fontSize": 12, "textAlign": "right" },
{ "type": "connector", "connector": {
  "from": { "x": 80, "y": 320 }, "to": { "x": 980, "y": 320 },
  "lineShape": "straight", "lineWidth": 1, "lineStyle": "dashed",
  "startArrow": "none", "endArrow": "none"
}},

{ "type": "connector", "connector": {
  "from": { "x": 70, "y": 240 }, "to": { "x": 80, "y": 240 },
  "lineShape": "straight", "lineWidth": 1,
  "startArrow": "none", "endArrow": "none"
}},
{ "type": "text", "x": 20, "y": 230, "width": 50, "height": 20,
  "text": "150", "fontSize": 12, "textAlign": "right" },
{ "type": "connector", "connector": {
  "from": { "x": 80, "y": 240 }, "to": { "x": 980, "y": 240 },
  "lineShape": "straight", "lineWidth": 1, "lineStyle": "dashed",
  "startArrow": "none", "endArrow": "none"
}},

{ "type": "connector", "connector": {
  "from": { "x": 70, "y": 160 }, "to": { "x": 80, "y": 160 },
  "lineShape": "straight", "lineWidth": 1,
  "startArrow": "none", "endArrow": "none"
}},
{ "type": "text", "x": 20, "y": 150, "width": 50, "height": 20,
  "text": "200", "fontSize": 12, "textAlign": "right" },
{ "type": "connector", "connector": {
  "from": { "x": 80, "y": 160 }, "to": { "x": 980, "y": 160 },
  "lineShape": "straight", "lineWidth": 1, "lineStyle": "dashed",
  "startArrow": "none", "endArrow": "none"
}},

{ "type": "rect", "id": "bar-0", "x": 120, "y": 240,
  "width": 220, "height": 240, "borderRadius": 4 },
{ "type": "text", "x": 120, "y": 215,
  "width": 220, "height": 20,
  "text": "120", "fontSize": 14, "textAlign": "center" },
{ "type": "text", "x": 120, "y": 490,
  "width": 220, "height": 30,
  "text": "Q1", "fontSize": 14, "textAlign": "center" },

{ "type": "rect", "id": "bar-1", "x": 420, "y": 80,
  "width": 220, "height": 400, "borderRadius": 4 },
{ "type": "text", "x": 420, "y": 55,
  "width": 220, "height": 20,
  "text": "200", "fontSize": 14, "textAlign": "center" },
{ "type": "text", "x": 420, "y": 490,
  "width": 220, "height": 30,
  "text": "Q2", "fontSize": 14, "textAlign": "center" },

{ "type": "rect", "id": "bar-2", "x": 720, "y": 180,
  "width": 220, "height": 300, "borderRadius": 4 },
{ "type": "text", "x": 720, "y": 155,
  "width": 220, "height": 20,
  "text": "150", "fontSize": 14, "textAlign": "center" },
{ "type": "text", "x": 720, "y": 490,
  "width": 220, "height": 30,
  "text": "Q3", "fontSize": 14, "textAlign": "center" }
]
}

坐标推导验证：

bar-0 (120): height = (120/200)*400 = 240, y = 480-240 = 240
bar-1 (200): height = (200/200)*400 = 400, y = 480-400 = 80
bar-2 (150): height = (150/200)*400 = 300, y = 480-300 = 180
bar-0 x = 80 + 0*300 + 80/2 = 120, bar-1 x = 80 + 1*300 + 40 = 420, bar-2 x = 80 + 2*300 + 40 = 720

陷阱

单系列用多色（不专业）：同一数据系列所有柱体应使用同一颜色
缺 Y 轴单位标注，读者无法理解数值含义
柱体间距不均匀（脚本需统一计算 barGap）
Y 轴刻度线和格线误带箭头
坐标轴忘记带箭头

此场景必须用 .cjs 脚本生成。Agent 使用时只需修改 data 数组，其余坐标与柱体高度全自动计算。

const { writeFileSync } = require('fs');

bar-chart.md 7.8 KB История Исходник

柱状图

Content 约束

Layout 选型

Layout 规则

坐标与尺寸计算指南

完整 JSON 示例

陷阱

bar-chart.md 7.8 KB

История Исходник