Excel在统计分析中的应用—第十二章—回归分析与预测-指数回归与预测



可使用LOGEST函数进行指数回归分析，使用GROWTH函数进行指数预测。

LOGEST函数说明：

The Excel LOGEST function returns statistical information on the exponential curve of best fit, through a supplied set of x- and y- values.
The basic statistical information returned is the array of constants, mn, mn-1, ... , b (or the constants m and b if there is a single range of x-values), for the exponential curve equation. However, you can also request that additional regression statistics be returned.
The syntax of the Logest function is:
LOGEST( known_y's, [known_x's], [const], [stats] )

GROWTH函数说明：

The Excel Growth function calculates the exponential growth curve through a given set of y-values and (optionally), one or more sets of x-values. The function then extends the curve to calculate additional y-values for a further supplied set of new x-values.

The syntax of the function is:

GROWTH( known_y's, [known_x's], [new_x's], [const] )

Where the arguments are as follows: