使用 for 循环读取多个文件

Read multiple files with for loop

我的代码如下。在代码中,我只评估 'fb2010' 文件中的数据。我想添加其他文件“'fb2020''fb2030''fb2040' 并通过相同的代码评估它们的数据。我的问题是如何应用 for 循环并包含其他数据文件。我试过了,但我被 for 循环弄糊涂了。

load('fb2010');                                    % loading the data
x = fb2010(3:1:1502,:);
% y_filt = filter(b,a,x);                          % filtering the received signal
y_filt= filter(b,a,x,[],2);
%%%%%%%  fourier transform
nfft = length(y_filt);
res = fft(y_filt,nfft,2)/nfft;
res2 = res(:,1:nfft/2+1);                           %%%% taking single sided spectrum
res3 = fft(res2,[],2);
for i = 3:1:1500                                   %%%% dividing each row by first row.
 resd(i,:) = res3(i,:)./res3(1,:);
end

我假设您的文件是 MAT 文件,而不是 ASCII。您可以通过 load return a struct and using dynamic field referencing:

n = 4;
for i = 1:n
    vname = ['fb20' int2str(i) '0']; % Create file/variable name based on index
    s = load(vname);                 % Load data as struct (overwriting previous s)
    x = s.(vname)(3:1:1502,:);       % Access struct with dynamic field reference

    % Rest of your code
    ...
end

如果您使用的是纯 ASCII 文件,load 不会生成结构。但是,此类文件要简单得多(请参阅 load/save 的文档)。以下代码可能会起作用:

n = 4;
for i = 1:n
    vname = ['fb20' int2str(i) '0']; % Create file/variable name based on index
    s = load(vname);                 % Load data as matrix (overwriting previous s)
    x = s(3:1:1502,:);               % Directly index matrix

    % Rest of your code
    ...
end

最好将文件扩展名添加到您的 load 命令中,以使您的代码更具可读性。