内容简介作者简介 - 科学与工程计算系

mccstartup not found.
exm3* not found.
!copy h:\mywork\temp\exm3.m d:\mywork
mcc -L Cpp exm3 %
1 file(s) copied
??? Error: The options specified will not generate any output files.
Please use one of the following options to generate an executable output
file:
-x (generates a MEX-file executable using C)
-m (generates a stand-alone executable using C)
-p (generates a stand-alone executable using C++)
-S (generates a Simulink MEX S-function using C)
-B sgl (generates a stand-alone graphics library executable using C
(requires the SGL))
-B sglcpp (generates a stand-alone graphics library executable using
C++ (requires the SGL))
-B pcode (generates a MATLAB P-code file)
Or type mcc -? for more usage information.
Error in ==> D:\MATLAB6P5\toolbox\compiler\mcc.dll
!copy h:\mywork\temp\mccstartup C:\WINDOWS\Applic~1\MathWorks\MATLAB
\R13
mcc -L Cpp exm3 %
dir exm3* %
!del mccstartup
1 file(s) copied
exm3.cpp exm3.hpp exm3.m
11.5 编译文件的性能优化
11.5.1 优化数组
【例 11.5.1-1】优化标量。假设有以下文件,要求对之编译,比较得到 MEX 文件的性能。
[foo.m]
function y = foo(x)
y = 2*pi*x;
分别运行以下编译指令:
mcc -O none -x foo
tic;foo(1:10);toc
elapsed_time =
0.5500
mcc -O none -O fold_scalar_mxarrays:on -x foo
tic;foo(1:10);toc
elapsed_time =
0.1100
【例 11.5.1-2】而对于非标量的情况,相应的可激活优化选项 fold_non_scalar_mxarrays。优
化编译以下文件:
[test.m]
function y = test
y = [ 1 0; 0 1] * [ pi pi/2; -pi -pi/2 ];
7