write a string at each beginning record

[christophe.zarzycki]

I save data in a file .txt with spreadsheet ....I record a cycle each hour.I have temperature ,pressure, time and date...I want to write a string at each beginning record......(e.g. A 125 256 ....the number of the process I save ) and the last record will be A 125 256.
Thank you for your help.

[Gorka Larrea]

You have to use write to spreadsheet in the string form, there used to be instructions on modifying it inside write to spreadsheet, but basically consists in changing input numeric arrays into string arrays. This way you can use string arrays with any stamp in the first column, but your data has to be a string too.
Hope this helps