How to set "characters" as "missing values"?
My table on JMP has a column that contains both numbers and characters. The table lists down products, and this column records the minimum requirement for a specific performance test. Therefore, the cells of the columns could store one of the three:- a numerical value;- "N/A" when the test is not required to be performed on a specific product (entry);- two alternative numerical value (e.g. 4.5 if....