Use toolbox function extrinsic

Question

Jonas Horntvedt 2022-11-11

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1848538-use-toolbox-function-extrinsic

评论： Jonas Horntvedt 2022-11-15

I am using the function csape in matlab. When I am testing it works as it should. When I am implenting the function that contains csape to simulink I do get an error. I can see that to use the function as extrinsic is recommended, but I have troubles implementing the solution. This is how I am using the function. I think I will get the same issue wit fnval. How can I use these functions extrinsic?

y = 30;

x = 0;

yend = 0

xend = 30

inslope = deg2rad(0);

endslope = deg2rad(-90);

xx = linspace(x,xend,100);

pp = csape([x xend],[inslope,[y yend],endslope], 'clamped');

yy = -fnval(pp,xx);

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Answer 1

Shreni Malyala 2022-11-15

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1848538-use-toolbox-function-extrinsic#answer_1100273

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You can use coder.extrinsic('function') to declare the functions as extrinsic prior to the function call.

% add this line of code before pp = csape([x xend],[inslope,[y yend],endslope], 'clamped');
coder.extrinsic('csape') 
% add this line of code before yy = -fnval(pp,xx);
coder.extrinsic('fnval') 