Python调用Matlab的混合编程
一. 配置方法:
找到Matlab安装根目录,比如D:matlab,然后进入D:matlabexternenginespython目录中,Shift+右键-->“在此处打开命令窗口”,
1.有管理员权限的,用 管理员权限执行:python setup.py install
2.无管理员权限的,将installdir添加到Python的包搜索路径中,再加入到PYTHONPATH环境变量中即可:python setup.py build --build-base builddir install --install-base installdir
二. 使用方法:
#Start and quitimport matlab.engine
eng = matlab.engine.start_matlab()
eng.quit()
#Call Matlab Functions:
#Just call with form eng.xxx()
#the function xxx should in the namespace of matlab.
#Asynchronously Call
import matlab.engine
eng = matlab.engine.start_matlab()
future = eng.sqrt(4.0,async=True)
ret = future.result()
print(ret)
#WorkSpace Usage:
import matlab.engine
eng = matlab.engine.start_matlab()
eng.workspace[y] = x
a = eng.eval(sqrt(y))
print(a)
#Skills for unsupported features in python
#eng.eval()
import matlab.engine
eng = matlab.engine.start_matlab()
eng.eval("T = readtable(patients.dat);",nargout=0)
#Plot With Matlab:
import matlab.engine
eng = matlab.engine.start_matlab()
data = eng.peaks(100)
eng.mesh(data)
三. 测试用例(Python2):
import matlab import matlab.engine import time def basic_test(eng): print "Basic Testing Begin" print "eng.power(100,2) = %d"%eng.power(100,2) print "eng.max(100,200) = %d"%eng.max(100,200) print "eng.rand(5,5) = " print eng.rand(5,5) print "eng.randi(matlab.double([1,100]),matlab.double([3,4]))"% eng.randi(matlab.double([1,100]),matlab.double([3,4])) print "Basic Testing Begin" def plot_test(eng): print "Plot Testing Begin" eng.workspace[data] = eng.randi(matlab.double([1,100]),matlab.double([30,2])) eng.eval("plot(data(:,1),ro-)") eng.hold(on,nargout=0) eng.eval("plot(data(:,2),bx--)") print "Plot testing end" def audio_test(eng,freq,length): print "Audio Testing Begin" eval_str = "f = %d;t=%d;"%(freq,length) eng.eval(eval_str,nargout = 0) eng.eval(fs = 44100;T=1/fs;t=(0:T:t);,nargout = 0) eng.eval(y = sin(2 * pi * f * t);,nargout = 0) eng.eval(sound(y,fs);,nargout = 0) time.sleep(length) print "Audio Testing End" def fourier_test(eng): pass def demo(eng): basic_test(eng) plot_test(eng) audio_test(eng,680,1) if __name__ == "__main__": print "Initializing Matlab Engine" eng = matlab.engine.start_matlab() print "Initializing Complete!" demo(eng) print "Exiting Matlab Engine" print "Press Any Key to Exit" raw_input(); eng.quit() print "Bye-Bye" eng = matlab.engine.start_matlab() eng.quit()
四. 注意点
比起C++ Engine的API,Python Engine的最牛逼之处就是可以直接以原生的形式调用Matlab内建函数,而不是用Eval方法。当然,如果你想用也是一点问题都没有的。同时,变量的存取再也不用和一堆mxArray以及它们的ADT打交道了,直接以字典的形式对engine.workspace进行存取即可。显然比C++的调用方式更为科学。
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