extrapolation

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extrapolation

 [ek-strap″o-la´shun]
inference of one or more unknown values on the basis of that which is known or has been observed; usually applied to estimation beyond the upper and lower ranges of observed data as opposed to interpolation between data points.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

extrapolation

the estimation of a value beyond a given series, for example, the extension of the line of a graph beyond the calculated points.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
References in periodicals archive ?
Considering the influence of occlusion and hands-overlapping, a dynamic gesture tracking method is proposed in this sub-section with the assistance of improved linear extrapolation predictor.
This paper reported results of new land-use-based models for small area population projections, and compared those models' forecast accuracy with that of naive projections based on linear extrapolation and a modified constant-shares-of-growth model.
Table 1 Characteristic of the specimens [16] Characteristic Specimen 1 Specimen 2 Mild steel Mild steel Material (C = 1.5%) (C = 1.5%) Thermal Conductivity, k, W/mK 36 36 Specific Heat, [c.sub.p], kJ/kgK 0.486 0.486 Density, [rho], kg/[m.sup.3] 7753 7753 Reservoir Temperature, [T.sub.0], [degrees]C 52.9 18.7 Table 2 RMS error obtained by using different methods Methods [e.sub.RMS], [degrees]C Linear extrapolation method 0.0706 Inverse method (CGM) 1.1549 Numerical method 2.9885
Having an estimate for the p and q of the firm's earnings stream will help investors to predict the path and the time when earnings growth can be expected to slow, better than linear extrapolation.
It was again somewhat higher than the theoretical value calculated from equation (2) [([r.sub.OH]).sub.c.rf] but in both cases it is not clear whether linear extrapolation is justified.
Linear extrapolation of life expectancy is reasonable.
The value of [D.sub.0] found by linear extrapolation was 48 nm.
In this follow-up, smoking habits were much the same as in the earlier study In terms of lung function and smoking history there was an essentially linear extrapolation of the original data, showing a sharp divergence between the sustained quitters and continuing smokers.
Those data "suggest the need to reconsider the validity of the linear extrapolation," the researchers say.
The latter is only -0.00075 at 0[degrees] and -0.00094 at 60[degrees] for the highest concentration studied in this investigation; hence, its value for 70[degrees], 80[degrees], 90[degrees], and 95[degrees] C was obtained by linear extrapolation. These values of (ext.) were used in the calculations at all the temperatures studied.
The problem, of course, is that the future is many things, but almost never a linear extrapolation of either past or present.
It is based primarily on a linear extrapolation of data from mines, because lower indoor concentrations make studies in homes inconclusive.

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