##### Page tree

Contents:

NOTE:  Designer Cloud Powered by Trifacta Educational is a free product with limitations on its features. Some features in the documentation do not apply to this product edition. See Product Limitations.

This example illustrates how to use the conditional calculation functions.

Functions:

ItemDescription
AVERAGEIF Function Generates the average value of rows in each group that meet a specific condition. Generated value is of Decimal type.
MINIF Function Generates the minimum value of rows in each group that meet a specific condition. Inputs can be Integer, Decimal, or Datetime.
MAXIF Function Generates the maximum value of rows in each group that meet a specific condition. Inputs can be Integer, Decimal, or Datetime.
VARIF Function Generates the variance of values by group in a column that meet a specific condition.
STDEVIF Function Generates the standard deviation of values by group in a column that meet a specific condition.

Source:

Here is some example weather data:

datecityraintempwind
1/23/17Valleyville0.0012.86.7
1/23/17Center Town0.319.45.3
1/23/17Magic Mountain0.000.07.3
1/24/17Valleyville0.2517.23.3
1/24/17Center Town0.541.17.6
1/24/17Magic Mountain0.325.08.8
1/25/17Valleyville0.023.36.8
1/25/17Center Town0.833.35.1
1/25/17Magic Mountain0.59-1.76.4
1/26/17Valleyville1.0815.04.2
1/26/17Center Town0.966.17.6
1/26/17Magic Mountain0.77-3.93.0
1/27/17Valleyville1.007.22.8
1/27/17Center Town1.3220.00.2
1/27/17Magic Mountain0.775.65.2
1/28/17Valleyville0.12-6.15.1
1/28/17Center Town0.145.04.9
1/28/17Magic Mountain1.501.10.4
1/29/17Valleyville0.3613.37.3
1/29/17Center Town0.756.19.0
1/29/17Magic Mountain0.603.36.0

Transformation:

The following computes average temperature for rainy days by city:

Transformation Name `New formula` `Single row formula` `AVERAGEIF(temp, rain > 0)` `city` `'avgTempWRain'`

The following computes maximum wind for sub-zero days by city:

Transformation Name `New formula` `Single row formula` `MAXIF(wind,temp < 0)` `city` `'maxWindSubZero'`

This step calculates the minimum temp when the wind is less than 5 mph by city:

Transformation Name `New formula` `Single row formula` `MINIF(temp,wind<5)` `city` `'minTempWind5'`

This step computes the variance in temperature for rainy days by city:

Transformation Name `New formula` `Single row formula` `VARIF(temp,rain >0)` `city` `'varTempWRain'`

The following computes the standard deviation in rainfall for Center Town:

Transformation Name `New formula` `Single row formula` `STDEVIF(rain,city=='Center Town')` `city` `'stDevRainCT'`

You can use the following transforms to format the generated output. Note the `\$col` placeholder value for the multi-column transforms:

Transformation Name `Edit column with formula` `stDevRainCenterTown,maxWindSubZero` `numformat(\$col,'##.##')`

Since the following rely on data that has only one significant digit, you should format them differently:

Transformation Name `Edit column with formula` `varTempWRain,avgTempWRain,minTempWind5` `numformat(\$col,'##.#')`

Results:

datecityraintempwindavgTempWRainmaxWindSubZerominTempWind5varTempWRainstDevRainCT
1/23/17Valleyville0.0012.86.78.35.17.263.80.37
1/23/17Center Town0.319.45.37.3 532.60.37
1/23/17Magic Mountain0.000.07.31.66.43-3.9120.37
1/24/17Valleyville0.2517.23.38.35.17.263.80.37
1/24/17Center Town0.541.17.67.3 532.60.37
1/24/17Magic Mountain0.325.08.81.66.43-3.9120.37
1/25/17Valleyville0.023.36.88.35.17.263.80.37
1/25/17Center Town0.833.35.17.3 532.60.37
1/25/17Magic Mountain0.59-1.76.41.66.43-3.9120.37
1/26/17Valleyville1.0815.04.28.35.17.263.80.37
1/26/17Center Town0.966.17.67.3 532.60.37
1/26/17Magic Mountain0.77-3.93.01.66.43-3.9120.37
1/27/17Valleyville1.007.22.88.35.17.263.80.37
1/27/17Center Town1.3220.00.27.3 532.60.37
1/27/17Magic Mountain0.775.65.21.66.43-3.9120.37
1/28/17Valleyville0.12-6.15.18.35.17.263.80.37
1/28/17Center Town0.145.04.97.3 532.60.37
1/28/17Magic Mountain1.501.10.41.66.43-3.9120.37
1/29/17Valleyville0.3613.37.38.35.17.263.80.37
1/29/17Center Town0.756.19.07.3 532.60.37
1/29/17Magic Mountain0.603.36.01.66.43-3.9120.37