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cubic spline

   Also found in: Wikipedia 0.01 sec.
cubic spline [′kyü·bik ′splīn]
(mathematics)
One of a collection of cubic polynomials used in interpolating a function whose value is specified at each of a collection of distinct ordered values,Xi(i=1, …,n), and whose slope is specified atX1andXn; one cubic polynomial is found for each interval, such that the interpolating system has the prescribed values at each of theXi, the prescribed slope atX1andXn, and a continuous slope at each of theXi.


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13) These modified forecasts were then interpolated by a cubic spline procedure: This resulted in a monthly series characterized by a curve constrained to pass through the ex ante forecast values in Inflation Report release months, with the property that, as the next Inflation Report month approached, forecast values in the intervening months tended toward the new ex ante forecast values.
We have used cubic splines throughout this paper, except in the cases that involve partial volume, for which no explicit interpolation takes place.
For arrowtooth flounder, the best fitting model was the cubic spline (Table 1, Fig.
 
 
 
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