Reading and writing binary files in matlab

To use the xlsread function use the syntax:. This line of code reads filename. You can then manipulate the array g any way you want. Make sure that the file you choose is in the same directory were you save your M-files usually the work directory otherwise you get an error.

You can specify the path to a file but, this can get messy. To write data to an. The xlswrite command below creates a spreadsheet called filename. There are several ways to write to a file. The simplest way I have found is. You can substitute newFile. Also, there might be some issues with formatting in Excel. The formatting issues can usually be handled inside Excel but if they can't you might have to play around with the fopen command parameters.

This is pretty similar if not the same way you would write to a file in C. This works only if the text is entirely numerical, without special formatting. Otherwise you get an 'unrecognized character' error. The ideas apply to all languages Fortran, python, Matlab , Note that the unformatted files that you have generated from your program can be pretty easily read into other software like for example Matlab or Python, Created by Francesco Pontiggia , last modified on Jun 08, The pros of binary unformatted data are: If you write the content of the memory directly to file, it will occupy 4bytes in disk space.

It means that for the same amount of space you can only write 4 characters, including the decimal ". You need to know what kind of data the files contains if you want to read it back. The file is just a simple long sequence of bits with no format. For example, supposed you end up with a file with 32bytes of data in it.

There is no way to tell from the file content.