Analysis Definition

.a.yaml files

Header

the analysis definition is a yaml file in the jamovi/ directory, with the extension .a.yaml. the analysis definition describes the analysis, the way it appears in menus, and the options it requires. the file is named to match the name of the analysis it describes, but converted to lowercase. an example is ttestis.a.yaml:

---
name:  TTestIS
title: Independent Samples T-Test
menuGroup: T-Tests
version: '1.0.0'
jas: '1.0'

options:
    - name: ...
      type: ...
    - name: ...
      type: ...

Options

options represent the options that an analysis requires in order to run. when a jamovi module is used as an R package, they represent the arguments to the function. when used in jamovi itself, they represent the user interface (UI) options presented to the user.

each option has a name, a type, and some additional properties which are described in greater detail below.

when a value is specified by the user (either through the jamovi user interface, or through a function argument), the option checks the value and produces an error if the value is not suitable. the checks performed by each option are also detailed below.

the different option types are as follows:

Data

Data is used for analyses which require data (almost all of them). if used, it should be the first of the options, and should always be called data. it has no additional properties.

example

    - name: data
      type: Data

Bool

Bool is used for true/false values, and is typically represented in the UI as a checkbox.

properties

• title
• default: false

example

    - name: bf
      type: Bool
      title: Bayes factor
      default: false

checks

• the value must be true or false

Integer

Integer is used for values which need to be whole numbers. For ‘floating point’ numbers, use Number instead.

properties

• title
• default: 0
• min: -Inf
• max: Inf

checks

• the value must be a whole number
• the value must fall between the min and the max

Number

Number is used for values which need to be numeric. For whole numbers, use Integer instead.

properties

• title
• default: 0.0
• min: -Inf
• max: Inf

example

    - name: ciWidth
      type: Number
      title: Confidence level
      min: 50
      max: 99.9
      default: 95

checks

• the value must be a number
• the value must fall between the min and the max

List

List is used where only one of several values may be specified, and only one at a time. In the UI, these are typically represented as either a listbox, or a set of radio buttons.

properties

• title
• options
• default: <the first of options>

options must be specified as an array of strings

checks

• the value must be one of the options

Variable

Variable is used where a variable/column from the data set needs to be specified. In the UI, these are typically represented as a ‘drop box’, where variables can be dragged and dropped.

• title
• suggested: []
• permitted: [continuous, ordinal, nominal, nominaltext]
• rejectInf: true
• rejectMissing: false

The value of Variable is a string (in R, a character vector of length 1) containing the assigned variable name. If nothing is assigned it has a value of null.

checks

• whether the value is a string
• whether the variable exists in the data set
• whether the variable type is permitted
• whether the variable contains non-finite values (if rejectInf is true)
• whether the variable contains missing values (if rejectMissing is true)

Variables

Variables is used where multiple variables/columns from the data set need to be specified. In the UI, these are typically represented as a ‘drop box’, where variables can be dragged and dropped.

• title
• suggested: []
• permitted: [continuous, ordinal, nominal, nominaltext]
• rejectInf: true
• rejectMissing: false

The value is an array of strings (in R, a character vector). If nothing is assigned to Variables it’s value is an empty array (in R, a character vector of length 0).

checks

• whether the variable exists in the data set
• whether the variable type is permitted
• whether the variable contains non-finite values (if rejectInf is true)
• whether the variable contains missing values (if rejectMissing is true)