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笔者在实践中发现统计线图横轴坐标点的确定方法不统一 ,似与统计多边图横轴坐标点的确定方法有混淆之处。现在统计线图横轴坐标点的确定有以下 3种意见 :(1)举例为某地1982～ 1986年麻疹和百日咳的发病率资料 ,所作统计线图横轴第一个坐标点点在 1981年与 1982年刻度的中间位?
In practice, the author found that the determination method of the horizontal axis coordinate point of the statistical line graph is not uniform, which seems to be confused with the determination method of the horizontal axis coordinate point of the statistical polygon diagram. Now, the following three kinds of opinions have been determined on the horizontal axis of the statistical graph: (1) For example, the data on the incidence of measles and whooping cough from 1982 to 1986 were obtained. The statistical coordinates were plotted on the horizontal axis at the first coordinate point in 1981. The middle of the 1982 scale?