How to convert text to matrix?

I attached a program and a dataset: https://files.fm/u/j8snykvm. This program splits positive and negative comments from the text dataset and then remove stop words and finally converts the text to the numeric matrix but when I attach my excel dataset or convert it to other formats like TXT, CSV... it doesn't work. Is it possible to have your opinion?

[Stephen23]

@phdcomputer Eng: please do not post links to third-party file hosting websites. You can upload code and file here by clicking the paperclip button.

"when I attach my excel dataset or convert it to other formats like TXT, CSV... it doesn't work"

What does "attach my excel dataset" mean? What does "it doesn't work" mean? What does any of this have to do with MATLAB or any TMW product?

[phdcomputer Eng]

Thanks highly for your attention. My purpose is uploading the data but I have an empty output. In general, the aim is how to convert this text to the numeric matrix.

[Stephen23]

"My purpose is uploading the data but I have an empty output."

I guess you mean that you want to import the file data into MATLAB.

"In general, the aim is how to convert this text to the numeric matrix"

Use one of MATLAB's file importing tools, they will do that conversion for you:

https://www.mathworks.com/help/matlab/data-import-and-export.html

If you upload your data files here by clicking the paperclip button then someone can help you select an appropriate tool and show you how to use it.