很简单，在org里面有一个table, 表格如下：（数据来源参考org将csv文件转换成table)

#+caption: 鸢尾花识别
#+PLOT: title:"鸢尾花散点图" ind:1 type:2d deps:(3) set:"xlabel 'sepal length'" set:"ylabel 'petal length'" 
#+PLOT: with:points
| Sepal Length | Sepal Width | Petal Length | Petal Width | class           |
|--------------+-------------+--------------+-------------+-----------------|
|          5.1 |         3.5 |          1.4 |         0.2 | Iris-setosa     |
|          4.9 |         3.0 |          1.4 |         0.2 | Iris-setosa     |
|          4.7 |         3.2 |          1.3 |         0.2 | Iris-setosa     |
|          4.6 |         3.1 |          1.5 |         0.2 | Iris-setosa     |
|          5.0 |         3.6 |          1.4 |         0.2 | Iris-setosa     |
|          5.4 |         3.9 |          1.7 |         0.4 | Iris-setosa     |
|          4.6 |         3.4 |          1.4 |         0.3 | Iris-setosa     |
|          5.0 |         3.4 |          1.5 |         0.2 | Iris-setosa     |
|          4.4 |         2.9 |          1.4 |         0.2 | Iris-setosa     |
|          4.9 |         3.1 |          1.5 |         0.1 | Iris-setosa     |
|          5.4 |         3.7 |          1.5 |         0.2 | Iris-setosa     |
|          4.8 |         3.4 |          1.6 |         0.2 | Iris-setosa     |
|          4.8 |         3.0 |          1.4 |         0.1 | Iris-setosa     |
|          4.3 |         3.0 |          1.1 |         0.1 | Iris-setosa     |
|          5.8 |         4.0 |          1.2 |         0.2 | Iris-setosa     |
|          5.7 |         4.4 |          1.5 |         0.4 | Iris-setosa     |
|          5.4 |         3.9 |          1.3 |         0.4 | Iris-setosa     |

运行org-plot/gnuplot命令后，显示

设置点要用with，而不是set命令。