I start with Matlab and would like to know how could I access to a folder and get contents to access files and read them.
I have a variable in workspace tmpfolder that is equal to 'path to folder' but I don't find how could I make dir(tmpfolder) and get files, browse any file content to get a string value...
I would start with dir() and fopen().
More generally, try starting at the beginning: Working with Files and Folders.
If you have an image file in jpeg format in another folder named myimage and a text file called mytext, use:
prefix_image='myimage';
prefix_data='mytext';
fileformat='.jpg';
dataformat='.txt';
folder='C:\Users\khaled\Documents\MATLAB\';
image = imread(strcat(folder,prefix_image,fileformat));
data=textread(strcat(folder,prefix_data,fileformat),'%f');
Related
Is it possible to list all of the files in a directory of a certain file type, and then save them in the same directory but as a separate file type using MatLab?
In my case, I have 144 files saved as in a .fig format, but I would like to copy them as a .tif format so that I don't have to go and change each file manually.
I know I can list all the files in my directory using the dir function and I guess I could simply run for loop with i=1:length(dir) but I don't know how to isolate the files of a specific file type. I don't see filetype as a field name on the mathworks website for dir.
Thanks for any suggestions.
To list only files of type .fig:
files = dir('*.fig');
You can then loop over the names:
for k = 1:numel(files)
filename = files(k).name;
% do something with filename
end
I plan to list all the file names of a current folder (include subfolder) and put them and their path into an array. I can use s=dir to put the names and path of all the files in the current folder, I can also use "dir **/." to show the files in the current folder and subfolders.
But when I use "s=dir **/.", Matlab gives me error and I am not able to proceed. Is there anyone can help me on this？
The reason why I want to do this is to compare two folders which may contain plenty of duplicate files. I want to use file name as the indicator and to find out the new adding or removed files, so that I can update the log excel we have.
Thank you for your help.
To list only the files and not the directories try
file_names = dir('**/');
file_names = file_names(~[file_names.isdir]);
file_names = {file_names.name}
You were really close, you can just run:
s = dir('**\');
And that should get you what you need
I have the following code which can create a directory within a selected folder:
photos_dir = 'C:\Users\Bob\Photos';
mkdir(photos_dir,'Christmas 2015')
I'd like to then be able to save an image to this folder, I think using something like:
imwrite(img,Christmas 2015,'jpg')
However, this does not select the "Christmas 2015" folder which is in the "\Photos" directory. How can I make the image be written to this location?
First of all, you're going to have a syntax error since Christmas 2015 should at least be a string. But other than that, if you want to save a file in a particular location (other than the current working directory), you need to provide the full path to the file location.
To do this, you need to use fullfile to combine all of your directory and file names together into a full file path.
image_name = fullfile(photos_dir, 'Christmas 2015', 'yourphoto.jpg');
imwrite(img, image_name, 'jpg')
I'm new to matlab and I've wrote a code that implements the gamma function for image processing. I generate around 300 photos named '001.jpg' to '300.jpg' and then use ffmpeg to make a video.
In the end, I only need the video result and need a command to delete all the photos generated in the directory! is there a way to do that?
If you want to remove all .jpg files in the current directory you can use the delete command with a wildcard (*)
delete('*.jpg')
If the files live in a folder other than the current directory, you can specify the directory in this way.
folder = '/path/to/my/files';
delete(fullfile(folder, '*.jpg'))
If you want to limit it to just files that have number filenames, you could do something like the following
files = dir('*.jpg');
filenames = regexp({files.name}, '^[0-9]+\.jpg$', 'match', 'once');
filenames = cellstr(cat(1, filenames{:}));
delete(filenames{:})
Adding to Suever's answer (not allowed to comment yet):
Assuming you already know the names of the images you're creating, you could save your script a 'trip' to the folder and back by creating the filenames list yourself thus:
for i=1:numOfImages
filenames(i)={strcat(num2str(i),'.jpg')};
end
delete(filenames{:})
Upon numerous searches, I am here to see if someone has any idea on how I should go about tackling this issue.
I have a folder with sub-folders. The sub-folder containers each has files of different file types e.g. pdf, png, jpeg, tiff, avi and word documents.
My goal is to write a code in C# that will go into the subfolder, and combined all the files into one pdf using the name of the folder. The only exception is that a file such as avi will not be pdf'ed in which case I want a nudge as to which folder it is and possibly file name. I am trying to use the form approach, so that you can copy in the folder pathname and also destination of the created pdf.
Thanks.
to start, create a FolderBrowserDialog to get the root folder. Alternatively just make a textbox in which you paste the folder name ( less preferred since the first method gives you nicer error-handling straight out of the box )
In order to iterate through, see How to: Iterate Through a Directory Tree
To find the filetype, check System.IO.FileInfo.Extension for each file you iterate through. Add those to list with the data you need. ( hint, create a list of objects in which your object reflects the data you need such as path, type etc,... ). If its an avi don't toss it in the list but flash a warning (messagebox?) instead.
From here the original question gets fuzzy. What exactly do you need in the pdf. Just the filenames and locations or do you actually want to throw the actual contents of the file in pdf?