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Anonymous
Not applicable

## Using slicer to change dates for calculating difference column

Hi all,

I'm at a loss here and would love some help.

This is what my data looks like. The depth column increases by 0.5, which is why I created the groups column. Another example of the data below.

My goal is to have a graph similar to the one below, but one which shows the temperature difference based on the date input from the slicer/slider.

For example if the slider is set from 7/10/2018 to 14/10/2018, the temperature difference at a depth of 20m would be given as 106.738 - 105.259 = 1.479. This calculation after being replicated for the other depths would then be plotted in their groups similar to the above picture.

Can this be done? I have tried many DAX statements to create columns but even then they are static and cannot be changed via a slicer.

Cheers,

Visura

1 ACCEPTED SOLUTION
Anonymous
Not applicable

How many data points are there for each depth and time?  Assuming only row for each combination, the following code shoud work.  Note that this is a measure, not a calculated column, so it will respond to a slicer.

```Delta =
VAR MaxDate =
MAX ( Table[Date] )
VAR MinDate =
MIN ( Table[Date] )
VAR MinTemp =
CALCULATE (
MIN ( Table[Temperature] ),
Table[Date] = MinDate
)
VAR MaxTemp =
CALCULATE (
MAX ( Table[Temperature] ),
Table[Date] = MaxDate
)
RETURN
MaxTemp - MinTemp```
2 REPLIES 2
Anonymous
Not applicable

How many data points are there for each depth and time?  Assuming only row for each combination, the following code shoud work.  Note that this is a measure, not a calculated column, so it will respond to a slicer.

```Delta =
VAR MaxDate =
MAX ( Table[Date] )
VAR MinDate =
MIN ( Table[Date] )
VAR MinTemp =
CALCULATE (
MIN ( Table[Temperature] ),
Table[Date] = MinDate
)
VAR MaxTemp =
CALCULATE (
MAX ( Table[Temperature] ),
Table[Date] = MaxDate
)
RETURN
MaxTemp - MinTemp```
Anonymous
Not applicable

Thanks so much! Works perfectly.

I had been struggling for hours, and didn't think that a measure could dynamically hold values like this. Big props to you Chris.

For the current data set there is only one temperature data point for each depth for a given day.  In future the frequency of the data will increase, from once/day -> once/15mins. From what I understand of this code, this approach will still work given the higher resolution, correct?

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