| 单词 | interpolation |
| 释义 | interpolation An approximation technique for finding the value of a function or a measurement that lies within known values. If the values f(x0), f(x1), …, f(xn) of a function f of a variable x are known in the interval [x0,xn], the value of f(x) for a value of x inside the interval [x0,xn] can be found by interpolation. One method of interpolation, called linear interpolation for x0 < x < x1, gives: f(x) f(x0) + [f(x1) - f(x0)] (x - x0)/(x1 - x0) ,which is derived using the assumption that between the points x0 and x1, the graph of the function f(x) can be regarded as a straight line. More complicated methods of interpolation exist, using more than two values for the function. The techniques used for interpolation are usually much better than the techniques used in extrapolation |
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