请教如何将wave文件变成matlab数据文件？
请教如何将wave文件变成matlab数据文件？也就是变成Matlab data file，而不是matlab M-file？非常感谢！ 可以先在VC++中把wave文件数据读到一个数组中,然后用c语言把这个数组写成.mat文件格式.在VC++中读写mat文件的代码可以参考如下代码:
//////////////////////////////////////
/*
* MAT-file creation program
*
* See the MATLAB API Guide for compiling information.
*
* Calling syntax:
*
* matcreat
*
* Create a MAT-file which can be loaded into MATLAB.
*
* This program demonstrates the use of the following functions:
*
*matClose
*matGetVariable
*matOpen
*matPutVariable
*matPutVariableAsGlobal
*
* Copyright 1984-2000 The MathWorks, Inc.
* $ Revision: 1.13 $
*/
#include <stdio.h>
#include <string.h> /* For strcmp() */
#include <stdlib.h> /* For EXIT_FAILURE, EXIT_SUCCESS */
#include "mat.h"
#define BUFSIZE 256
int main() {
MATFile *pmat;
mxArray *pa1, *pa2, *pa3;
double data = { 1.0, 4.0, 7.0, 2.0, 5.0, 8.0, 3.0, 6.0, 9.0 };
const char *file = "mattest.mat";
char str;
int status;
printf("Creating file %s...\n\n", file);
pmat = matOpen(file, "w");
if (pmat == NULL) {
printf("Error creating file %s\n", file);
printf("(Do you have write permission in this directory?)\n");
return(EXIT_FAILURE);
}
pa1 = mxCreateDoubleMatrix(3,3,mxREAL);
if (pa1 == NULL) {
printf("%s : Out of memory on line %d\n", __FILE__,
__LINE__);
printf("Unable to create mxArray.\n");
return(EXIT_FAILURE);
}
pa2 = mxCreateDoubleMatrix(3,3,mxREAL);
if (pa2 == NULL) {
printf("%s : Out of memory on line %d\n", __FILE__,
__LINE__);
printf("Unable to create mxArray.\n");
return(EXIT_FAILURE);
}
memcpy((void *)(mxGetPr(pa2)), (void *)data, sizeof(data));
pa3 = mxCreateString("MATLAB: the language of technical
computing");
if (pa3 == NULL) {
printf("%s :Out of memory on line %d\n", __FILE__,
__LINE__);
printf("Unable to create string mxArray.\n");
return(EXIT_FAILURE);
}
status = matPutVariable(pmat, "LocalDouble", pa1);
if (status != 0) {
printf("%s :Error using matPutVariable on line %d\n",
__FILE__, __LINE__);
return(EXIT_FAILURE);
}
status = matPutVariableAsGlobal(pmat, "GlobalDouble", pa2);
if (status != 0) {
printf("Error using matPutVariableAsGlobal\n");
return(EXIT_FAILURE);
}
status = matPutVariable(pmat, "LocalString", pa3);
if (status != 0) {
printf("%s :Error using matPutVariable on line %d\n",
__FILE__, __LINE__);
return(EXIT_FAILURE);
}
/*
* Ooops! we need to copy data before writing the array.(Well,
* ok, this was really intentional.) This demonstrates that
* matPutVariable will overwrite an existing array in a
MAT-file.
*/
memcpy((void *)(mxGetPr(pa1)), (void *)data, sizeof(data));
status = matPutVariable(pmat, "LocalDouble", pa1);
if (status != 0) {
printf("%s :Error using matPutVariable on line %d\n",
__FILE__, __LINE__);
return(EXIT_FAILURE);
}
/* Clean up. */
mxDestroyArray(pa1);
mxDestroyArray(pa2);
mxDestroyArray(pa3);
if (matClose(pmat) != 0) {
printf("Error closing file %s\n",file);
return(EXIT_FAILURE);
}
/* Re-open file and verify its contents with matGetVariable. */
pmat = matOpen(file, "r");
if (pmat == NULL) {
printf("Error reopening file %s\n", file);
return(EXIT_FAILURE);
}
/* Read in each array we just wrote. */
pa1 = matGetVariable(pmat, "LocalDouble");
if (pa1 == NULL) {
printf("Error reading existing matrix LocalDouble\n");
return(EXIT_FAILURE);
}
if (mxGetNumberOfDimensions(pa1) != 2) {
printf("Error saving matrix: result does not have two
dimensions\n");
return(EXIT_FAILURE);
}
pa2 = matGetVariable(pmat, "GlobalDouble");
if (pa2 == NULL) {
printf("Error reading existing matrix GlobalDouble\n");
return(EXIT_FAILURE);
}
if (!(mxIsFromGlobalWS(pa2))) {
printf("Error saving global matrix: result is not global\n");
return(EXIT_FAILURE);
}
pa3 = matGetVariable(pmat, "LocalString");
if (pa3 == NULL) {
printf("Error reading existing matrix LocalString\n");
return(EXIT_FAILURE);
}
status = mxGetString(pa3, str, sizeof(str));
if(status != 0) {
printf("Not enough space. String is truncated.");
return(EXIT_FAILURE);
}
if (strcmp(str, "MATLAB: the language of technical
computing")) {
printf("Error saving string: result has incorrect
contents\n");
return(EXIT_FAILURE);
}
/* Clean up before exit. */
mxDestroyArray(pa1);
mxDestroyArray(pa2);
mxDestroyArray(pa3);
if (matClose(pmat) != 0) {
printf("Error closing file %s\n",file);
return(EXIT_FAILURE);
}
printf("Done\n");
return(EXIT_SUCCESS);
}
///////////////////////////////////////////////////
希望对你有帮助哦 原帖由 cattle421 于 2006-12-20 20:12 发表
请教如何将wave文件变成matlab数据文件？也就是变成Matlab data file，而不是matlab M-file？非常感谢！
没有记错的话，matlab中有相应的函数读取，搜索一下版面吧 多谢各位，VC我不是太懂，楼上的方法我试过好像只能存为matlab M-file，没有Matlab data file 用wavread函数读进来，然后再save成dat文件应该没有问题啊 “然后再save成dat文件应该没有问题啊”
请问楼上，这句话用语句怎么写？ 原帖由 cattle421 于 2006-12-22 13:13 发表
“然后再save成dat文件应该没有问题啊”
请问楼上，这句话用语句怎么写？
比如你的数据在矩阵a中
save('a.mat',a)
数据就保存在当前工作目录下的a.mat文件里了 原帖由 cattle421 于 2006-12-22 13:13 发表
“然后再save成dat文件应该没有问题啊”
请问楼上，这句话用语句怎么写？
这个就是我题目上说的啊，存为的是matlab M-file，好像不是Matlab data file
不知道是我概念不清还是这两个就是一回事？ .mat 好象是数据文件哦
只能按照特定的数据结构写吧? 原帖由 mulan 于 2006-12-22 15:17 发表
比如你的数据在矩阵a中
save('a.mat',a)
数据就保存在当前工作目录下的a.mat文件里了
应该是save('a.mat','a') 请问如何在VC++中将wave文件格式转换成数组呢，然后怎么写成.mat格式呢？？
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