dlmread filename not a character vector

3 次查看（过去 30 天）
Mike Hodny
Mike Hodny 2018-2-15
评论： Bob Thompson 2018-2-15
Hello, I am having problems using dlm read within a for loop. I would like to define a directory my files are in, the basic name of my files, a sequence of numbers at the end of my filename, and the file extension. An example of the filenames is as follows.
folder1/folder2/folder3/filename_000.txt
folder1/folder2/folder3/filename_001.txt
folder1/folder2/folder3/filename_002.txt
This continues up to n files. I would then like to read each file and take out specific data, hence the dlmread function.
What I have is as follows:
file_directory = 'folder1/folder2/folder3/';
file_prefix = 'filename_';
%My numbers 000, 001, 002, 003, etc. are all contained within an array called: A
file_suffix = '.txt';
for i=1:n %n for the number of files I want to load
filename = [file_directory file_prefix A(i) file_suffix];
temp=dlmread(filename ,'', [17 0 3664 1]);
end
The code runs until temp=dlmread... wherein it gets an error of, "Filename must be a character vector."
Any way on how to fix this?
  1 个评论
Bob Thompson
Bob Thompson 2018-2-15
I would try defining the file name as:
filename = strcat('folder1/folder2/folder3/filename_',num2str(A(i)),'.txt');
or
filename = sprintf('folder1/folder2/folder3/filename_%d.txt',A(i));
This will eliminate the need to define the directory and such ahead of time.
Alternatively you can try to use the uigetfile() command. I personally use this option more as it allows me a little more freedom as the script user, and when combined with the directory using fullfile() I can give the directory and all through a basic for loop.
[filenames,filedir] = uigetfile('*.txt','','Multiselect','on')
filepath = fullfile(filedir,filenames);
for i = 1:n
temp = dlmread(filepath(i),'',[17 0 3664 1]);
end

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Mike Hodny
Mike Hodny 2018-2-15
I figured out the problem. The working for loop is as follows:
for j=0:files
filename = [file_folder file_prefix A{1,j+1} file_suffix];
temp=dlmread(filename,'', [17 0 3664 1]);
end

更多回答（1 个）

Walter Roberson
Walter Roberson 2018-2-15
Use fullfile and sprintf together. For the numeric field use a %03d format specification in sprintf

类别

在 Help Center 和 File Exchange 中查找有关 File Operations 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by