![]() You can use a Percent From table calculation to calculate the percentage of a previous value. You can see that between January and February, 2011, there was a -66% difference in sales, but between February and March, 2011, there was a huge improvement of 1,058% sales.Ī Percent From table calculation computes a value as a percentage of some other value-typically, as a percentage of the previous value in the table-for each mark in the visualization. You can use a Percent Difference From table calculation to calculate how sales fluctuate (how much they go up or down) between the years for each month. For example, you could add an initial table calculation to calculate the running total for sales per month within each individual year, and then a secondary calculation to calculate the year-over-year percent difference for each month from one year to the next.įor an example showing how to create a secondary calculation, see Running Total calculation.Ī Percent Difference From table calculation computes the difference between the current value and another value in the table as a percentage for each mark in the visualization. ![]() With Running Total and Moving Calculation table calculations, you have the option to transform values twice to obtain the result you want-that is, to add a secondary table calculation on top of the primary table calculation. The value listed for January, 2012 is the average sales for November and December, 2011, and January, 2012. For example, the value listed for December 2011 is the average sales for October, November, and December, 2011. To do this, you can transform each monthly total so that it averages the monthly total for it and the two previous months over time. You can use a Moving calculation to find out how sales totals are trending over time. You can use a moving calculation to define a range of values to summarize using an aggregation of your choice. For example, with securities data there are so many fluctuations every day that it is hard to see the big picture through all the ups and downs. Instead of filtering, hiding the column keeps the calculation intact.įor each mark in the view, a Moving Calculation table calculation (sometimes referred to as a rolling calculation) determines the value for a mark in the view by performing an aggregation (sum, average, minimum, or maximum) across a specified number of values before and/or after the current value.Ī moving calculation is typically used to smooth short-term fluctuations in your data so that you can see long-term trends. Why? If you filtered out the first year to remove it from the view, it would also remove it from the calculation so the second year doesn't have a previous year to compare to and is left blank. Hide the column that you don’t want to show to keep the calculation intact. Tip: When calculating year-over-year growth, the first year doesn't have a previous year to compare to, so the column is left blank. You can see that in January, there was a 368 USD difference between sales in 20, and a 26,161 USD difference between sales in 20. You can use a Difference From table calculation to calculate how sales fluctuate (how much they go up or down) between the years for each month. It shows the total sales per month for 2011, 2012, 2013, and 2014 for a large store chain. ![]() This is the default value.Ĭalculates the difference between the current value and the next value in the partition.Ĭalculates the difference between the current value and the first value in the partition.Ĭalculates the difference between the current value and the last value in the partition.Ĭonsider the text table below. ![]() In the Table Calculation dialog box, for Relative to, select one of the following options: PreviousĬalculates the difference between the current value and the previous value in the partition. Right-click a measure in the view and select Add Table Calculation. To specify from which value the difference should be calculated: But in some cases you may want something different. In most cases, you want to calculate the difference between the current value and the previous value, as in the procedure above. With a Difference From, Percent Difference From, or Percent From calculation, there are always two values to consider: the current value, and the value from which the difference should be calculated. A Difference From table calculation computes the difference between the current value and another value in the table for each mark in the visualization. ![]()
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