compute_scale {admiral} | R Documentation |

## Compute Scale Parameters

### Description

Computes the average of a set of source values and transforms the result from the source range to the target range. For example, for calculating the average of a set of questionnaire response scores and re-coding the average response to obtain a subscale score.

### Usage

```
compute_scale(
source,
source_range = NULL,
target_range = NULL,
flip_direction = FALSE,
min_n = 1
)
```

### Arguments

`source` |
A vector of values to be scaled A numeric vector is expected. |

`source_range` |
The permitted source range A numeric vector containing two elements is expected, representing the
lower and upper bounds of the permitted source range. Alternatively, if no
argument is specified for |

`target_range` |
The target range A numeric vector containing two elements is expected, representing the
lower and upper bounds of the target range. Alternatively, if no
argument is specified for |

`flip_direction` |
Flip direction of the scale? The transformed values will be reversed within the target range, e.g. within the range 0 to 100, 25 would be reversed to 75. This argument will be ignored if Default: Permitted Values: |

`min_n` |
Minimum number of values for computation The minimum number of non-missing values in source for the computation to
be carried out. If the number of non-missing values is below A positive integer is expected. Default: 1 |

### Details

Returns a numeric value. If source contains less than `min_n`

values,
the result is set to `NA`

. If `source_range`

and `target_range`

aren't
specified, the mean will be computed without any transformation being
performed.

### Value

The average of source transformed to the target range or `NA`

if
source doesn't contain `min_n`

values.

### See Also

BDS-Findings Functions that returns a vector:
`compute_bmi()`

,
`compute_bsa()`

,
`compute_egfr()`

,
`compute_framingham()`

,
`compute_map()`

,
`compute_qtc()`

,
`compute_qual_imputation()`

,
`compute_qual_imputation_dec()`

,
`compute_rr()`

### Examples

```
compute_scale(
source = c(1, 4, 3, 5),
source_range = c(1, 5),
target_range = c(0, 100),
flip_direction = TRUE,
min_n = 3
)
```

*admiral*version 1.1.1 Index]