12/28/2022 0 Comments Matlab r2013a create binary![]() ![]() When working with "big data", you will want to avoid singular accesses like this. This is basic usage of memmapfile, and it encapsulates the entire data set in a single access. a name to assign to this data ( m for "matrix" in this example) the size of the data (a matrix of size numRows by numColumns in this example), and c. The data type ( double in this example), b. The 'Format' of the data, which is a cell array with three components: a. ![]() To create a memory-mapped file, we call memmapfile with these two arguments: filename = įilename = fullfile(scratchFolder, filename) This will make it easy to glance at our output and recognize that we are getting the values that are expected. The value of in the matrix is set to be c*1,000,000+r. ![]() Because data of type double is being created, the file will consume 8*numRows*numColumns bytes of free disk space. This can take from a moment to many minutes to run, depending on the sizes declared above. scratchFolder = tempdir Ĭreate the scratch file. Do note that, of course, the disk space required to run this code will grow with the matrix size you create. This is hardly "big data", and you can adjust the parameters here to create a larger problem. To keep things simple and snappy here, the matrix is under a gigabyte in size. numRows and numColumns can be changed to experiment with different sizes. To get started, create a potentially large 2D matrix that is stored on disk. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |