I have a workbook with numerous different spreadsheets that each have a table containing data from different samples. The tables have the same columns and look the same, just different data. Now I want to take say column x and column y from every table and make one large column x and one large column y on a seperate sheet containing data from all the other sheets. I need this so I can graph it and get a best fit line for all the different samples. The problem is, the tables on the other sheets can grow because this spreadsheet is active and users will input new data as time goes on. Also, the compiled columns x and y on the summary sheet cannot have blank spaces, only numbers, because I also need to reference these growing columns in a formula to get the best fit line coefficients which I will be using for another formula. I feel like I've tried everything, please help.