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c/c++中读取和写入mat文件 --- MAT File I/O Library（二）

2024-07-08 06:53:15   223人阅读

本篇记述c/c++中读取mat文件示例

测试数据matioTest.zip下载地址:

http://pan.baidu.com/s/1sjPkMsd

1. 读取matioTest.zip中s.mat文件，数据为普通matrix

 1 #include <iostream> 2 #include <cassert> 3 #include <matio.h> 4  5  6 int main() 7 { 8     mat_t *matfp; 9     const char* matFilePath = "testRes\\s.mat";10     matfp = Mat_Open(matFilePath, MAT_ACC_RDONLY);11     if (NULL == matfp) {12         fprintf(stderr, "Error opening MAT file %s\n", matFilePath);13         return EXIT_FAILURE;14     }15     matvar_t* matVar = NULL;16     // read data ‘x‘17     matVar = Mat_VarRead(matfp, "x");18     if (matVar) {19         assert(matVar->data_type == MAT_T_DOUBLE);20         size_t xSize = matVar->nbytes / matVar->data_size;21         const double* xData = http://www.mamicode.com/static_cast<const double*>(matVar->data);22         for (int i = 0; i < xSize; ++i) {23             std::cout << xData[i] << " ";24         }25         std::cout << std::endl;26         for (int i = 0; i < matVar->rank; ++i) {27             std::cout << matVar->dims[i] << " ";28         }29         std::cout << std::endl;30     }31     // read data ‘y‘32     matVar = Mat_VarRead(matfp, "y");33     if (matVar) {34         assert(matVar->data_type == MAT_T_DOUBLE);35         size_t ySize = matVar->nbytes / matVar->data_size;36         const double* yData = http://www.mamicode.com/static_cast<const double*>(matVar->data);37         for (int i = 0; i < ySize; ++i) {38             std::cout << yData[i] << " ";39         }40         std::cout << std::endl;41         for (int i = 0; i < matVar->rank; ++i) {42             std::cout << matVar->dims[i] << " ";43         }44         std::cout << std::endl;45     }46     // read ‘minX‘ and ‘step‘ is similar47     Mat_VarFree(matVar);48     Mat_Close(matfp);49     system("pause");50     return EXIT_SUCCESS;51 }
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2. 读取matioTest.zip中image_0001.mat文件，数据为struct

 1 #include <iostream> 2 #include <cassert> 3 #include <matio.h> 4  5 int main() 6 { 7     mat_t *matfp; 8     const char* matFilePath = "testRes\\image_0001.mat"; 9     matfp = Mat_Open(matFilePath, MAT_ACC_RDONLY);10     if (NULL == matfp) {11         fprintf(stderr, "Error opening MAT file %s\n", matFilePath);12         return EXIT_FAILURE;13     }14     matvar_t *feaSetStruct = NULL, *feaArr = NULL;15     feaSetStruct = Mat_VarRead(matfp, "feaSet");16     if (feaSetStruct) {17         assert(MAT_T_STRUCT == feaSetStruct->data_type);18         feaArr = Mat_VarGetStructFieldByName(feaSetStruct, "feaArr", 0);19         if (feaArr) {20             assert(MAT_T_DOUBLE == feaArr->data_type);21             size_t Size = feaArr->nbytes / feaArr->data_size;22             const double* Data = http://www.mamicode.com/static_cast<const double*>(feaArr->data);23             // print Data or copy to other memory container24         }25     }26     Mat_VarFree(feaSetStruct);27     system("pause");28     return EXIT_SUCCESS;29 }
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 参考资料：

http://sourceforge.net/p/matio/discussion/609377/thread/b703ce7a/

http://sourceforge.net/p/matio/discussion/609376/thread/9df1158c/?limit=50#1cac/10aa


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