I have a file consisting of surveys taken on various dates of a number of participants. Column A is the name, Column B is the item of the survey. Column C, D, E, etc. are dates on which the surveys took place.
I need a graphical representation of the y-axis which is the value of the data. The x-axis are the dates.
Participants and Items should be filterable.
Usually, the number of rows were < 255. In this project the number of rows is > 350 and here I encounter a problem.
Please look at the attached file.