读取多个文件(波形读取)

Question

我想从某个目录读取几个文件。这是我的剧本：

prefix = '\wav\';
wav_arr = ['1.wav'; '2.wav'; '3.wav'];
wav_arr = cellstr(wav_arr);

len = length(wav_arr);
sig = [];
fs = [];
for i = 1:len
    path = strcat(pwd, prefix, wav_arr(i));
    [s, curr_fs] = audioread(path);
    sig = [sig s];
    fs = [fs curr_fs];
end

但我收到了一个错误：

Error using which
Argument must contain a string.

Error in audiovideo.internal.absolutePathForReading (line 7)
whichFileName = which(filename);

Error in audioread (line 74)
filename = audiovideo.internal.absolutePathForReading(...

Error in main_experiment (line 14)
    [s, curr_fs] = audioread(path);

问题是path是1x1 cell，不是string。而为cellstr()执行path不起作用。

Answer 1

for i = 1:len
    path = strcat(pwd, prefix, wav_arr(i));
    [s, curr_fs] = audioread(path);
    sig = [sig s];
    fs = [fs curr_fs];
end

成为

for i = 1:len
    path = strcat(pwd, prefix, wav_arr{i});
    [s, curr_fs] = audioread(path);
    sig = [sig s];
    fs = [fs curr_fs];
end

仅此而已，请阅读matlab中有关单元格的文档，以了解单元格(1)和单元格{1}之间的区别。