csvRestart export data to zero or a few days ago???

I now have over 20000 csv lines in my export file. However, 95% of those lines were used during trial and error and are not real. I know that a running total of lines is necessary for my yearly limit license, but how cn I avoid exporting the data before yesterday?..... as the current data is the only data I want anymore.

[pragnan nadimatla]

As per my understanding you want to export CSV by avoiding data upto certain time as it is unnecessary.One approach is to convert timestamp column to datetime array using datetime function.Find the reference datetime of yesterday and find the index of first row in table with timestamp of yesterday.You can then filter the original CSV to include the rows with valid timestamps i.e starting from yesterday.Use indexing to Filter Data from Yesterday.

Please refer the following documentation on how to use datetime:

Arrays that represent points in time - MATLAB - MathWorks India

[Christopher Stapels]

@Shore Are you talking about ThingSpeak data? If so, you can use the API to adjust the date range of desired points.