**Contents:**

Returns

`true`

if the first argument is less than but not equal to the second argument. Equivalent to the `<`

operator.- Each argument can be a literal Integer or Decimal number, a function returning a number, or a reference to a column containing numbers.

Since the function returns a Boolean value, it can be used as a function or a conditional.

**NOTE: **Within an expression, you might choose to use the corresponding operator, instead of this function. For more information, see Comparison Operators.

## Basic Usage

keep row: LESSTHAN(Errors, 10)

**Output:** Keeps all rows in which the value in the `Errors`

column is less than 10.

## Syntax and Arguments

derive type:single value:LESSTHAN(value1, value2)

Argument | Required? | Data Type | Description |
---|---|---|---|

value1 | Y | string | The first value. This can be a number, a function returning a number, or a column containing numbers. |

value2 | Y | string | The second value. This can be a number, a function returning a number, or a column containing numbers. |

For more information on syntax standards, see Language Documentation Syntax Notes.

### value1, value2

Names of the column, expressions, or literals to compare.

- Missing values generate missing string results.

**Usage Notes:**

Required? | Data Type | Example Value |
---|---|---|

Yes | Column reference, function, or numeric or String value | `myColumn` |

## Examples

**Tip:** For additional examples, see Common Tasks.

### Example - Basic Comparison Functions

`LESSTHAN`

- See LESSTHAN Function.`LESSTHANEQUAL`

- See LESSTHANEQUAL Function.`EQUAL`

- See EQUAL Function.`NOTEQUAL`

- See NOTEQUAL Function.`GREATERTHAN`

- See GREATERTHAN Function.`GREATERTHANEQUAL`

- See GREATERTHANEQUAL Function.

**Source:**

colA | colB |
---|---|

1 | 11 |

2 | 10 |

3 | 9 |

4 | 8 |

5 | 7 |

6 | 6 |

7 | 5 |

8 | 4 |

9 | 3 |

10 | 2 |

11 | 1 |

**Transform:**

Add the following transforms to your recipe, one for each comparison function:

derive type:single value:LESSTHAN(colA, colB) as:'lt'

derive type:single value:LESSTHANEQUAL(colA, colB) as:'lte'

derive type:single value:EQUAL(colA, colB) as:'eq'

derive type:single value:NOTEQUAL(colA, colB) as:'neq'

derive type:single value:GREATERTHAN(colA, colB) as:'gt'

derive type:single value:GREATERTHANEQUAL(colA, colB) as:'gte'

**Results:**

colA | colB | gte | gt | neq | eq | lte | lt |
---|---|---|---|---|---|---|---|

1 | 11 | false | false | true | false | true | true |

2 | 10 | false | false | true | false | true | true |

3 | 9 | false | false | true | false | true | true |

4 | 8 | false | false | true | false | true | true |

5 | 7 | false | false | true | false | true | true |

6 | 6 | true | false | false | true | true | false |

7 | 5 | true | true | true | false | false | false |

8 | 4 | true | true | true | false | false | false |

9 | 3 | true | true | true | false | false | false |

10 | 2 | true | true | true | false | false | false |

11 | 1 | true | true | true | false | false | false |

### Example - Using Comparisons to Test Ranges

`inclusive`

columns indicating whether the minimum or maximum values are inclusive.**Tip: **As part of this exercise, you can see how to you can extend your recipe to perform some simple financial analysis of the data.

**Source:**

Location | Radius_ft | minRadius_ft | minInclusive | maxRadius_ft | maxInclusive |
---|---|---|---|---|---|

House1 | 55.5 | 10 | Y | 25 | N |

House2 | 12 | 10 | Y | 25 | N |

House3 | 14.25 | 10 | Y | 25 | N |

House4 | 3.5 | 10 | Y | 25 | N |

House5 | 27 | 10 | Y | 25 | N |

**Transform:**

After the data is loaded into the Transformer page, you can begin comparing column values:

derive type:single value: LESSTHANEQUAL(Radius_ft,minRadius_ft) as:'tooSmall'

While accurate, the above transform does not account for the`minInclusive`

value, which may be changed as part of your steps. Instead, you can delete the previous transform and use the following, which factors in the other column:
derive type:single value: IF(minInclusive == 'Y',LESSTHANEQUAL(Radius_ft,minRadius_ft),LESSTHAN(Radius_ft,minRadius_ft)) as:'tooSmall'

In this case, the`IF`

function tests whether the minimum value is inclusive (values of `10`

are allowed). If so, the `LESSTHANEQUAL`

function is applied. Otherwise, the `LESSTHAN`

function is applied. For the maximum limit, the following step applies:
derive type:single value: IF(maxInclusive == 'Y',GREATERTHANEQUAL(Radius_ft,maxRadius_ft),GREATERTHAN(Radius_ft,maxRadius_ft)) as:'tooBig'

Now, you can do some analysis of this data. First, you can insert a column containing the amount of the fine per foot above the maximum or below the minimum. Before the first`derive`

command, insert the following, which is the fine (`$15.00`

) for each foot above or below the limits:
derive type:single value: 15 as:'fineDollarsPerFt'

At the end of the recipe, add the following new line, which calculates the fine for crop circles that are too small:derive type:single value: IF(tooSmall == 'true', (minRadius_ft - Radius_ft) * fineDollarsPerFt, 0.0) as: 'fine_Dollars'

The above captures the too-small violations. To also capture the too-big violations, change the above to the following:derive type:single value: IF(tooSmall == 'true', (minRadius_ft - Radius_ft) * fineDollarsPerFt, if(tooBig == 'true', (Radius_ft - maxRadius_ft) * fineDollarsPerFt, '0.0')) as: 'fine_Dollars'

`0.0`

), the above adds the test for the too-big values, so that all fines are included in a single column. You can reformat the `fine_Dollars`

column to be in dollar format:
set col: fine_Dollars value: NUMFORMAT(fine_Dollars, '$###.00')

**Results:**

After you drop the columns used in the calculation and move the remaining ones, you should end up with a dataset similar to the following:

Location | fineDollarsPerFt | Radius_ft | minRadius_ft | minInclusive | maxRadius_ft | maxInclusive | fineDollars |
---|---|---|---|---|---|---|---|

House1 | 15 | 55.5 | 10 | Y | 25 | N | $457.50 |

House2 | 15 | 12 | 10 | Y | 25 | N | $0.00 |

House3 | 15 | 14.25 | 10 | Y | 25 | N | $0.00 |

House4 | 15 | 3.5 | 10 | Y | 25 | N | $97.50 |

House5 | 15 | 27 | 10 | Y | 25 | N | $30.00 |

Now that you have created all of the computations for generating these values, you can change values for `minRadius_ft`

, `maxRadius_ft`

, and `fineDollarsPerFt`

to analyze the resulting fine revenue. Before or after the transform where you set the value for `fineDollarsPerFt`

, you can insert something like the following:

set col: minRadius_ft value:'12.5'

After the step is added, select the last line in the recipe. Then, you can see how the values in the`fineDollars`

column have been updated.

This page has no comments.