open an application from the pc if not already open in matlab

You can use the system command in MATLAB to open an application from the PC if it is not already open. To do this, you need to specify the command to open the application using the system's default command for opening files or programs.

Here's an example of how to open a text file using the default application on Windows:

main.m
filename = 'C:\path\to\file.txt';
command = sprintf('open "%s"', filename);
system(command);
93 chars
4 lines

In this example, you need to replace 'C:\path\to\file.txt' with the actual path to the file you want to open.

Note that the specific command to open an application may vary depending on the operating system you are using. For example, on Windows, the open command is used, while on macOS, you would typically use the open -a command.

Make sure to adjust the command accordingly based on the platform you are working on.