the data path parameter should not have quotation marks in README file

[jp0215]

Thanks for your code! I have run successfully on my computer. However, I adjusted it for a long time during the experiment because the data_path parameter of the command to be run in the README file was entered incorrectly. The path entered here cannot contain single quotation marks, otherwise the quotation marks entered will be treated as part of the path, resulting in unreadable data. In the process of the experiment, I wasted a long time not reading the wrong information clearly. Ha ha ha. In short, thank you very much for your program.