# evaluatePolynomial(usingCoefficients:withVariables:result:) Evaluates a single-precision polynomial using specified coefficients and variables. ``` static func evaluatePolynomial(usingCoefficients coefficients: [Float], withVariables variables: U, result: inout V) where U : AccelerateBuffer, V : AccelerateMutableBuffer, U.Element == Float, V.Element == Float ``` ## Parameters `coefficients` An array that contains the coefficients. `variables` An array that contains the independent variables. `result` An array that receives the result of the calculation. ## Discussion For example, the following code evaluates the polynomial with the coefficients `[10.0, 20.0, 30.0]` and the variables `[7.0, 5.0]`: ```swift let coefficients: [Float] = [10, 20, 30] let variables: [Float] = [7, 5] let result = [Float]( unsafeUninitializedCapacity: variables.count) { buffer, initializedCount in vDSP.evaluatePolynomial(usingCoefficients: coefficients, withVariables: variables, result: &buffer) initializedCount = 2 } // Prints "[660.0, 380.0]". // result[0] = (10 * 7²) + (20 * 7¹) + (30 * 7⁰) = 660 // result[1] = (10 * 5²) + (20 * 5¹) + (30 * 5⁰) = 380 print(result) ``` --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)