This function is used to format a numerical output to a fixed number of decimal places. The values are rounded if necessary.
Consider the following case fragment:
20 Jun 13 30 Jun 13 15 Oct 13 12 Nov 03 Ca 2.35 2.33 2.40 Albumin 39 41 42 48
If we define a calculated value called CorrectedCa with expression
Ca – 0.02 * (Albumin – 40) formatted to 4 places
then it will have values
20 Jun 13 30 Jun 13 15 Oct 13 02 Nov 13 CorrectedCa 2.3700 2.3100 2.2400
Note: The syntax formatted to 1 place may also be used.