从1个变量的变异估测另一个变量的变异,称为回归关系。在林业实际工作中,有许多利用这种关系实现以简单测量代替复杂测量,减少工作量提高估测精度,或借以编制各种林业用表等。诸如:前次经理目测蓄积量与本次调查实测蓄积量之间的关系;判读蓄积量和实测蓄积量之间的关系;林分胸高断面积与林分蓄积量之间的关系等等。这些关系常呈直线关 Variation of one variable is estimated from the variation of the other, called a regression. In the practical work of forestry, there are many ways to make use of this kind of relationship to replace complex survey with simple survey, to reduce workload and improve estimation accuracy, or to compile various forestry tables. Such as the relationship between the visual volume of the previous manager and the actual volume of the survey; the relationship between the volume of the stored volume and the measured volume; the relationship between the area of ​​the chest height and the volume of the stand volume, and so on. These relationships are often straight off