在MATLAB R2014a中使用engGetVariable检索结构体错误
Error retrieving a struct in MATLAB R2014a with engGetVariable
#include <iostream>
#include "engine.h"
using namespace std;
int main(){
cout << "Start" << endl;
Engine *ep;
//Loading Matlab Version R2014a
if (!(ep = engOpen("/usr/local/MATLAB/R2014a/bin/matlab"))) {
cout << "nCan't start MATLAB enginen";
return 1;
}
engEvalString( ep, "load('error.mat')" );
// PHOTOSS_TEMP3 is a struct
mxArray *K = engGetVariable(ep, "PHOTOSS_TEMP3");
if(K !=NULL)
cout << "Loading variable was successful" << endl;
cout << "End";
return 0;
}
有了这个示例c++程序,我试图从MATLAB中读取一个结构体。但是程序在mxArray *K = engGetVariable(ep, "PHOTOSS_TEMP3");
行冻结,我得到错误信息:
Error using save
Can't write file stdio.
这也是makefile:
g++ -I/usr/local/MATLAB/R2014a/extern/include -O0 -g3 -Wall -c -fmessage-length=0 -MMD -MP -MF"matlab_error.d" -MT"matlab_error.d" -o "matlab_error.o" "matlab_error.cpp"
g++ -Wl,-rpath,/usr/local/MATLAB/R2014a/bin/glnxa64 -L/usr/local/MATLAB/R2014a/bin/glnxa64 -Xlinker -rpath-link -Xlinker /usr/local/MATLAB/R2014a/bin/glnx64 -o "matlab_error" matlab_error.o -leng -lmx
和MATLAB文件的"who":
Name Size Bytes Class Attributes
Custom_Parameters 0x0 0 double global
MultiSignal 1x1 83110 struct
PHOTOSS_TEMP1 1x1 8 double
PHOTOSS_TEMP3 1x1 8210 struct
Results 0x0 0 double global
alpha 1x1 8 double global
beta2 1x1 8 double global
current_block_no 1x1 8 double
fiber_length 1x1 8 double global
main_parameters 1x1 4644 struct global
message 0x0 0 char global
simulation_parameters 1x1 4644 struct
此错误仅在我使用MATLAB版本R2014a Linux时出现。我已经尝试过版本2013a/b,它工作得很好。当我试图读取示例文件的另一个结构体(如main_parameters或MultiSignal)时,也会发生这种情况。那么我的错误在哪里?
示例程序和matlab文件
您可能遇到与此用户相同的问题,在这种情况下,您应该使用MATLAB命令cell2mat
将数据保存在.m文件中。否则不能从cell
数据类型中读取