Question

求matlab的，coder.extrinsic的使用方法。

Answer 1

The following code declares the MATLAB functions patch and axis extrinsic in the MATLAB subfunction create_plot:

function c = pythagoras(a,b,color) %#codegen
% Calculates the hypotenuse of a right triangle
% and displays the triangle as a patch object.

c = sqrt(a^2 + b^2);

create_plot(a, b, color);

function create_plot(a, b, color)
%Declare patch and axis as extrinsic

coder.extrinsic('patch', 'axis');

x = [0;a;a];
y = [0;0;b];
patch(x, y, color);
axis('equal');
By declaring these functions extrinsic, you instruct the software not to compile or generate code for patch and axis. Instead it dispatches these functions to MATLAB for execution.