Clear data on s0 waveform

I need to clear data on s0 waveform. I’m storing 3600 data in an hour on eeprom. I watch the trend in s0 waveform. I want to stop the trend, get data from eeprom with Back button and go back 514 points. Of course the s0 waveform must be deleted first and then I have to load the new data. Is it possible to clean?

is Anwer here
String Tosend=“”;
Tosend = “cle “;
Tosend += 19;
Tosend += “,”;
Tosend += 255;