如何matlab函数“pchip”转换为C code。与MATLAB codeR [英] How to convert matlab function 'pchip' to c code with matlab coder

问题描述

我用Matlab codeR一个问题。我想生成从MATLAB C $ C $ç插值功能 pchip 。我验证与 coder.screener 的功能和它说，它适用于code一代，但是当我尝试建立 pchip.m 文件我得到这个错误：

I have a problem with Matlab Coder. I would like to generate C code from Matlab interpolating function pchip. I verified the function with coder.screener and it says it's available for code generation but when I try to build pchip.m file I get this error:

函数'pchip'不支持独立code一代。见coder.extrinsic的文档以了解如何在模拟使用此功能。

The function 'pchip' is not supported for standalone code generation. See the documentation for coder.extrinsic to learn how you can use this function in simulation.

谁能帮我？我真的需要这个功能转换成下一个程序我写这封信。

Can anyone help me? I really need to convert this function in C for a program I am writing.

推荐答案

从code代 PP = pchip（X，Y）的局限性的<一个href=\"http://www.mathworks.se/help/simulink/ug/functions-supported-for-$c$c-generation--alphabetical-list.html\"相对=nofollow>文档：

Limitations of pp = pchip(x,y) for code generation from the documentation:

• 输入 X 必须严格递增。

与 NaN的值
• 不会删除是项。


• 如果您生成code为 PP = pchip（X，Y）语法，你不能输入页在MATLAB中的 ppval 功能。从创建一个MATLAB 页结构页由code生成软件创建的结构：
  
  
  
  • 在code一代，使用 unmkpp 以分段多项式细节返回MATLAB。
  
  
  • 在MATLAB中，使用 mkpp 来创建页结构。
  
  
  • Input x must be strictly increasing.
  • Does not remove y entries with NaN values.
  • If you generate code for the pp = pchip(x,y) syntax, you cannot input pp to the ppval function in MATLAB. To create a MATLAB pp structure from a pp structure created by the code generation software:
    • In code generation, use unmkpp to return the piecewise polynomial details to MATLAB.
    • In MATLAB, use mkpp to create the pp structure.

    所以，请检查您是否满足previous点;特别是最后一个。你如何使/毁了挣钱一picewise多项式文档中的例子。

    So, please check that you fulfill the previous points; especially the last one. You have examples in the documentation of how to make/unmake a picewise polynomial.

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