Hi Evo...,
yes, you can display data in a graph

It would be nice to provide some sample data either in text file or as default values in a string control. I also don't quite understand what you do after reading the text file...
To convert csv-data you can use "spreadsheet string to array". There are also plenty functions to convert strings to numbers...
To display data place a chart/graph (xy-graph if you have xy-data) on your front panel and look at the context help (terminal in the block diagram) to see which connections you have to make! Look at the examples coming with labview!
Best regards,
GerdW

using LV2016/2019/2021 on Win10/11+cRIO, TestStand2016/2019