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园形分布的资料,不能用通常的方法求平均角度。如:现有三个角度值10°、30°、350°、用通常方法求算术均数则(?)=130°。按罗盘方向这三个角度均指向近北方、而算术平均角则指向东南方向,这与实际不符。若按园形分布方法计算则平均角为10°、刚好在这三个角度值之间,这是符合实际的。医学上有许多资料属于园形分布。如:ECG 中额面 QRS 电轴、脑血流图的主峰角、流入角以及某些疾病的昼夜发病时间或一年内发病日期等数据。西宁地区正常成人心电图中 QRS 电轴用园形分布方
The data of a garden distribution cannot be averaged by the usual method. Such as: the existing three angle values 10 °, 30 °, 350 °, using the usual method to find the arithmetic mean (?) = 130 °. According to the direction of the compass, these three angles all point to the north, and the arithmetic average angle points to the southeast direction. This is inconsistent with reality. If calculated according to the circular distribution method, the average angle is 10°, which is exactly between these three angle values, which is in line with reality. There is a lot of information in medicine that is shaped like a garden. Such as: ECG frontal QRS axis, the main peak angle of the cerebral blood flow diagram, inflow angle, and some diseases such as the onset of night or onset date within a year and other data. The QRS axis of a normal adult electrocardiogram in Xining area has a circular distribution