how do I load zip file in matlab code?

for i = 1:length(files)
    file = fullfile('c:\sar', files(i).name);
    disp(file);
    % Load and preprocess the data
    source = loadProduct(file); % Define or replace this function with actual data loading

it gives following errors

>> SAR_preprocessing

c:\sar\S1A_IW_GRDH_1SDV_20240823T005527_20240823T005552_055333_06BF4D_21CD.SAFE.zip

Error in SAR_preprocessing>main (line 44)

source = loadProduct(file); % Define or replace this function with actual data loading

Unrecognized function or variable 'loadProduct'.

Please suggest me how to load zip file for further processing.

Kuldeep

Answer 1

[Voss]

Use unzip to extract the files from the zip archive. Then read/load the relevant extracted files using the appropriate function(s), e.g. readmatrix.

Answer 2

[Epsilon]

Hi Kuldeep,

The above error is being produced as the function loadProduct used is not a defined MATLAB function. To extract a zip file you can use the ‘unzip’ function and then load the files from the extracted location.

Here is an exemplar attached code to extract and load/open files after extracting a zip file:

% Unzip the file unzip('zipFileName','extractDir')
unzip('C:\Folder\zipped.zip','C:\Folder\Extracted')

%cd to extracted Directory
cd 'C:\Folder\Extracted\'

% Extract list of all files in the directory/subdirectory 
files = dir ("**");

%convert the struct to a table for indexing
filesTable=struct2table(files);

for i = 1:height(filesTable)

   %Get full File path of each file
   filePath = fullfile(filesTable.folder{i}, filesTable.name{i})

   %check extension Type
   [~, ~, ext] = fileparts(filePath);

   %switch acc. to extension types
   switch ext
       % open different file types or load
       case '.m'
       open (filePath);
       case'.mat'
       load (filePath);
       % add other extensions here as needed
   end
end

You can use the above code and make changes to it for your use.

Also, for reference here are the links to the used MATLAB functions:

‘unzip’ https://www.mathworks.com/help/matlab/ref/unzip.html?searchHighlight=unzip&s_tid=srchtitle_support_results_1_unzip

‘fullfile’ https://www.mathworks.com/help/matlab/ref/fullfile.html?searchHighlight=fullfile&s_tid=srchtitle_support_results_1_fullfile

‘fileparts’ https://www.mathworks.com/help/matlab/ref/fileparts.html?searchHighlight=fileparts&s_tid=srchtitle_support_results_1_fileparts