引用 金星凌日:
要把什么样的数据输出成csv？

逗号分隔值，类似这种感觉

35.7, 1007.98, 0.17578125, 0.9609375, -0.1875
35.7, 1007.98, 0.17578125, 0.97265625, -0.17578125
35.7, 1007.9, 0.17578125, 0.9609375, -0.17578125
35.7, 1007.9, 0.1875, 0.94921875, -0.17578125
35.7, 1007.9, 0.1875, 0.94921875, -0.1640625
35.7, 1007.9, 0.1875, 0.9609375, -0.17578125
35.7, 1007.9, 0.17578125, 0.94921875, -0.140625
35.7, 1007.9, 0.1640625, 0.9609375, -0.15234375
35.7, 1007.84, 0.1640625, 0.9609375, -0.15234375
35.7, 1007.84, 0.1640625, 0.9609375, -0.1640625
35.7, 1007.84, 0.15234375, 0.9609375, -0.15234375
35.7, 1007.84, 0.15234375, 0.94921875, -0.1640625
35.7, 1007.84, 0.1640625, 0.94921875, -0.17578125
35.7, 1007.84, 0.1640625, 0.9609375, -0.1640625
35.7, 1007.9, 0.1640625, 0.94921875, -0.17578125
35.7, 1007.9, 0.1640625, 0.984375, -0.17578125
35.7, 1007.78, 0.1640625, 0.97265625, -0.1640625
35.7, 1007.78, 0.17578125, 0.9609375, -0.1640625
35.7, 1007.9, 0.1875, 0.9609375, -0.17578125
35.7, 1007.9, 0.1640625, 0.9609375, -0.17578125
35.7, 1007.87, 0.1640625, 0.97265625, -0.17578125
35.7, 1007.87, 0.17578125, 0.984375, -0.17578125
35.7, 1007.81, 0.17578125, 0.9609375, -0.17578125
35.7, 1007.81, 0.1875, 0.94921875, -0.17578125
35.7, 1007.9, 0.17578125, 0.94921875, -0.17578125
35.7, 1007.9, 0.1875, 0.94921875, -0.17578125
35.7, 1007.81, 0.17578125, 0.9609375, -0.1875
35.7, 1007.81, 0.17578125, 0.94921875, -0.19921875
35.7, 1007.84, 0.17578125, 0.94921875, -0.2109375
35.7, 1007.84, 0.1640625, 0.94921875, -0.19921875
35.7, 1007.87, 0.17578125, 0.9609375, -0.19921875
35.7, 1007.87, 0.1875, 0.94921875, -0.1875
35.7, 1007.84, 0.1640625, 0.94921875, -0.2109375
35.7, 1007.84, 0.15234375, 0.94921875, -0.19921875
35.7, 1007.9, 0.17578125, 0.94921875, -0.1875
35.7, 1007.9, 0.17578125, 0.9609375, -0.19921875
35.7, 1007.93, 0.1875, 0.94921875, -0.19921875
35.7, 1007.93, 0.1640625, 0.94921875, -0.1875
35.7, 1007.84, 0.17578125, 0.94921875, -0.1875
35.7, 1007.84, 0.1640625, 0.94921875, -0.19921875
35.7, 1007.9, 0.17578125, 0.94921875, -0.1875
35.7, 1007.9, 0.1875, 0.94921875, -0.2109375
35.7, 1007.87, 0.1875, 0.94921875, -0.22265625
35.7, 1007.87, 0.17578125, 0.9609375, -0.2109375
35.7, 1007.84, 0.1875, 0.94921875, -0.2109375
35.7, 1007.84, 0.17578125, 0.9609375, -0.19921875
35.7, 1007.87, 0.1875, 0.94921875, -0.1875
35.7, 1007.87, 0.17578125, 0.94921875, -0.1875
35.7, 1007.87, 0.1640625, 0.94921875, -0.1875
35.7, 1007.87, 0.1640625, 0.94921875, -0.1875
35.7, 1007.81, 0.17578125, 0.94921875, -0.1875
35.7, 1007.81, 0.1875, 0.97265625, -0.1875
35.7, 1007.84, 0.1875, 0.9609375, -0.1875
35.7, 1007.84, 0.1875, 0.97265625, -0.1875
35.7, 1007.84, 0.1875, 0.9609375, -0.1875
35.7, 1007.84, 0.1875, 0.94921875, -0.1875
35.7, 1007.87, 0.1875, 0.9609375, -0.1875
35.7, 1007.87, -0.000732421875, -0.000732421875, -0.000732421875

引用 金星凌日:
我想问的是原数据是什么样的。

原数据是javascript里面的几个数组

引用 acmilan:
网页上javascript没法直接向硬盘写文件，可以先生成临时csv文件(一般是在服务端，html5可以在本地)，然后指导用户下载，也可以输出到文本框<textarea>让用户自己复制。

问一下具体怎么操作，比如说一个二维数组怎么输出成csv文件让人下载