e b, c, and d coefficients for the (n-1) intervals (n is the number of known points), hence its size must be 3*(n-1); <code>tempBuffer</code> is temporally used for internal computations and its size is n+n-1.</p>
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<p>The x input array must be strictly sorted in ascending order and it must not contain twice the same value (x(i)&lt;x(i+1)). </p>
<h2 class="groupheader">Function Documentation</h2>
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