MAT File I/O 库txt文件生成mat格式

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获取MAT File I/O文件路径

https://sourceforge.net/projects/matio/?source=typ_redirect

配置

在Linux下

1、解压mat_1.5.8文件

2、运行./configure

3、make

4、make check

5、make install

不过在运行configure时候看打印出的log是否支持MATv7.3,若不支持，则进行脚本修改

# Check whether --with-hdf5 was given.if test "${with_hdf5+set}" = set; then :  withval=$with_hdf5; HDF5_DIR=${withval}else  HDF5_DIR=/home/huashui.liu/mat/localfi

同样也需要查看zlib是否支持，若不支持也需要进行路径修改

运行mat需要zlib库支持，zlib是压缩格式

http://zlib.net/

编译方式和mat编译一样

默认情况生成的mat格式的版本是v5的，若想生成v7.3版本，需要使用HDF5库支持，

https://www.hdfgroup.org/HDF5/release/obtainsrc.html#conf

按照INSTALL file编译

测试生成二维矩阵

#include <iostream>#include <math.h>#include <stdlib.h>#include "matio.h"#include <stdio.h>#include <string.h>#define CELLSIZE 2int main(int argc, char *argv[]){char msg[1024];long long colnum=0,rownum=0;char *tp;int row=0,col=0,n=0;//row col;double *b;mat_t    *matfp;matvar_t *matvar;size_t    dims[2] = {0,0};//Read file get col numberFILE *fp=fopen("liushuia.txt","r");if(fp==NULL){printf("Read file failed\n");return 0;}fgets(msg,1024,fp);tp=strtok(msg,"\n ' '");while(tp!=NULL){colnum++;tp=strtok(NULL,"\n ' '");}while(!feof(fp)){fgets(msg,1024,fp);rownum++;}dims[0] = rownum;dims[1] = colnum;printf("Start ................rownum=%ld\n",rownum);b=(double*)malloc(sizeof(double)*rownum*colnum);//malloc memory restore messageif(b==NULL){printf("malloc failed...%ld\n",colnum);return 0;}rewind(fp);while(!feof(fp)){for(;row<rownum;row++){fgets(msg,1024,fp);tp=strtok(msg,"\n ' '");for(col=0;col<colnum;col++){if(tp!=NULL){   b[col*rownum+row]=atof(tp);}tp=strtok(NULL,"\n ' '");}printf("row=%d\n",row);}fgets(msg,1024,fp);}//make matmatfp = Mat_CreateVer("testa.mat",NULL,MAT_FT_DEFAULT);if ( NULL == matfp ) {fprintf(stderr,"Error creating MAT file \"0718.mat\"\n");return EXIT_FAILURE;}matvar = Mat_VarCreate("x",MAT_C_DOUBLE,MAT_T_DOUBLE,2,dims,b,0);if ( NULL == matvar ) {fprintf(stderr,"Error creating variable for 'x'\n");} else {Mat_VarWrite(matfp,matvar,MAT_COMPRESSION_ZLIB);Mat_VarFree(matvar);}free(b);Mat_Close(matfp);printf("Mat End  .......\n");getchar();return 0;}

由于内存限制，当txt文件很大时候，申请内存可能不够，另外Mat_varCreate申请的内存也要受到限制，看看mat.c源文件Mat_VarCreate实现，

在vs上运行同样方式

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