杰瑞发布于2025-09-03
- group_zscore(x,group):
Calculates group Z-score - numerical measurement that describes a value's relationship to the mean of a group of values. Z-score is measured in terms of standard deviations from the mean. zscore = (data - mean) / stddev of x for each instrument within its group.计算组Z分数——描述一个值与一组值的平均值之间关系的数值度量。Z分数是根据平均值的标准偏差来衡量的。zscore=(data-mean)/stddev of x,用于其组内的每个仪器。