I m a developer up in Portland, OR. 我很想知道任何人是否能够协助:
I m working on Loess fit models using R, once I have the fit accomplished, I m looking to back-out the equation of the fitted non-linear curve, wondering if there is a way to determine this equation in R? I ve been looking but can t find any literature. For me, the graph of the function is great, but without the equation of the graph, I m kinda dead in the water.
Loess没有给你一个等值。 如果你只是想获得休息功能所恢复的价值,请使用<条码>(object, New.data)。
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Another disadvantage of LOESS is the fact that it does not produce a regression function that is easily represented by a mathematical formula. This can make it difficult to transfer the results of an analysis to other people. In order to transfer the regression function to another person, they would need the data set and software for LOESS calculations.
没有公式。 Loess是一种非对称的方法。 这不能简单地表述。
我们不能从联络处本身提取公式。 然而,你只能对联络处发现的问题采取另一种方法。 如果是简单的2D图表,那么很难找到好公式。 这样做的一种方法是象征性的回归(见wiki)。
了解这一点可能并不理想,而仅仅使用一种方法可能比“联络处”更好。
你们想从一个休息物体中收回公式? 你们也许能够做这样的事情:
> cars.lo <- loess(dist ~ speed, cars)
> formula(unclass(cars.lo)$terms)
dist ~ speed
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