Table of Contents

Editing object properties

For all objects
Icon Points
Icon Texts
Icon Functions
Icon Bode Magnitude
Icon Bode Magnitudes Sum
Icon Bode Phases
Icon Bode Phases Sum
Icon X Cursors
Icon Sequences
Icon Distributions

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Editing object properties

Introduction

Each object (as seen in chapter 0) has properties, which are the core of the customisability of objects. There exists many different kind of properties for different things, like naming objects, the position of points, the expression and domains of functions...

When creating an object, or when clicking on it on the object list, you open the Object Property Editor dialog.

Example dialog for a distribution

This dialog contains all of the properties of the object that can be modified. Each property is updated in real time. You can drag the dialog away to see the consequences of your changes on the graph.

That dialog can be closed by either closing the window or clicking the "OK" button. Both these options save all changes done.

Type of properties

There exists a lot of properties, but each of them are separated in different kinds.

Type	Editor	Example(s)	Comment
Strings	Inline text input	Object name	At the end of the input, the little "α" button allows to enter symbols (greek letters, and indices or supscripts letters and numbers).
Numbers (integers and decimals)	Inline text input	Label position	All inputs other than digits, one optional minus at the start and a dot in the middle are forbidden.
Expressions	Inline text input	Point position, function expression	Like strings, they have the symbol character input dialog. You can use values like e or pi (can also be noted π) in it.
Domains & ranges (sets)	Inline text input	Function domain and range	Use symbolic expressions (e.g R+* will translate to ℝ⁺*, the strictly positive integer set), ranges (e.g ]0;1[) or even sets (e.g {0;3;4}).
Booleans (true or false)	Checkbox	Show graduation on ω₀ for Bode Magnitude
Enumerations (set of predefined values)	Combo box	Label position and content, point style, bode pass
Other objects	Combo box	Bode's ω₀, X Cursor's target objects.	Contains a list of all objects created in required type, and allows to create a new one if needed. X Cursor target object is an exception as it can target several different types of objects.
Lists (lists of values)	List of inline text inputs	Unused at the moment	Sometimes allows the creation of values, at other the number of values is constant.
Dictionaries (list of values associated with another value)	List of lines having two text inputs separated by text	Sequence expression and default values, distribution default values	Sometimes allows the creation of values, at other the number of values is constant.

There can also be comments and notes in between properties to explain the specialties of certain non intuitive properties.

Object properties

The following section is a reference for all object properties. It's currently up to date with LogarithmPlotter v0.4.0.

Reference:

All objects
Points
Texts
Functions
Bode magnitudes
Bode magnitudes sum
Bode phases
Bode phases sum
X Cursors
Sequences
Distributions

For all objects

Icon	Property	Type	Value	Comment
	Name	string	It must not be the same for two objects.	This value represents the object.
	Label content	Enumeration	null: No label name: Name of the object name + value: Name of the object and it's value (generally in "name = value")	It's generally used with a positioning property (Label position or Label's X position).

Points

Property	Type	Value	Comment
X	Expression	Default: 1	Position of the point on the x-axis.
Y	Expression	Default: 0	Position of the point on the y-axis.
Label position	Enumeration	↑ Above ↓ Below ← Left → Right ↖ Above left ↗ Above right ↙ Below left ↘ Below right Default: ↑ Above	Position of the label relative to the point.
Point style	Enumeration	● ✕ ＋ Default: ●	Visual style of the point representation.

Texts

Property	Type	Value	Comment
X	Expression	Default: 1	Position of the text on the x-axis.
Y	Expression	Default: 0	Position of the text on the y-axis.
Label position	Enumeration	>\|< Center ↑ Top ↓ Bottom ← Left → Right ↖ Top left ↗ Top right ↙ Bottom left ↘ Bottom right Default: >\|< Center	Position of the label relative to the position.
Content	string	Default: New text	Content of the text item.
Disable LaTeX rendering for this text	boolean	True or false Default: false	When enabled, it will use LaTeX to render the whole text, and the parts within $$ will be rendered as a LaTeX mathematical expression string.

Functions

Icon

Property

Type

Value

Comment

Expression

Default: x

Expression of the function (depending on variable x).

Domain

Default: ℝ⁺*

Domain (definition range) of the function.

Range

Domain

Default: ℝ

Range (destination range) of the function.

Label position

Enumeration

↑ Above
↓ Below
← Left
→ Right
↖ Above left
↗ Above right
↙ Below left
↘ Below right

Default: ↑ Above

Position of the label relative to the position.

Display mode

Enumeration

Application:

name:	domain	↦	range
	x	→	expression

Function:
name(x) = expression

Default: Application

Display style of the function's label.

Label's X position

number

Default: 1

Base position for the label of the function based on the specified x-axis position and it's corresponding y-axis of the function.

Show points

boolean

True or false
Default: true

When using a non continous domain (for example ℕ, ℤ, sets like {0;3}) the function can be displayed using points at the points where the function is defined. Unticking this hides the points.

Show dashed lines

boolean

True or false
Default: true

When using a non continous domain (for example ℕ, ℤ, sets like {0;3}) the function can be displayed dashed lines between at the points where the function is defined. Unticking this hides the dashed lines.

Bode Magnitude

Property	Type	Value	Comment
ω₀	Point	By default, a newly created point prefixed by ω in (1,0).	Used as the base for the beginning/end of the transitional side of the bode magnitude as well.
Pass	Enumeration	High Low Default: High	Type of bode magnitude pass used for this this object.
Gain	Expression	Default: 20	Amount of decibels per decade used for the bode gain (should be positive for high pass, and negative for low pass).
Label position	Enumeration	↑ Above ↓ Below ← Left → Right ↖ Above left ↗ Above right ↙ Below left ↘ Below right Default: ↓ Below	Position of the label relative to the position.
Label's X position	number	Default: 1	Base position for the label of the function based on the specified x-axis position and it's corresponding y-axis on the function.
Show graduation on ω₀	boolean	True or false Default: false	When ticked, will show a vertical dashed line on top of the assigned ω₀.

Bode Magnitudes Sum

Icon	Property	Type	Value	Comment
	Label position	Enumeration	↑ Above ↓ Below ← Left → Right ↖ Above left ↗ Above right ↙ Below left ↘ Below right Default: ↑ Above	Position of the label relative to the position.
	Label's X position	number	Default: 1	Base position for the label of the bode magnitude based on the specified x-axis position and it's corresponding y-axis of the bode magnitude.

Bode Phases

Property	Type	Value	Comment
ω₀	Point	By default, a newly created point prefixed by ω in (1,0).	Used as the base for the beginning/end of the transitional side of the bode phase as well.
Phase	Expression	Default: 90	Amount of phase (defined in the unit below) used for the bode phase.
Unit to use	Enumeration	° deg rad Default: °	Unit of the phase to be used (used for display).
Label position	Enumeration	↑ Above ↓ Below ← Left → Right ↖ Above left ↗ Above right ↙ Below left ↘ Below right Default: ↓ Below	Position of the label relative to the position.
Label's X position	number	Default: 1	Base position for the label of the function based on the specified x-axis position and it's corresponding y-axis on the function.

Bode Phases Sum

Icon	Property	Type	Value	Comment
	Label position	Enumeration	↑ Above ↓ Below ← Left → Right ↖ Above left ↗ Above right ↙ Below left ↘ Below right Default: ↑ Above	Position of the label relative to the position.
	Label's X position	number	Default: 1	Base position for the label of the bode phase based on the specified x-axis position and it's corresponding y-axis of the bode phase.

X Cursors

Property	Type	Value	Comment
X	Expression	Default: 1	Position of the cursor on the x-axis.
Object to target	Executable object*	Default: no object is selected.	Target object of which to show the value of through the X Cursor. *Executable objects are objects which take values all along the x-axis with a corresponding y-axis value. Functions, bode magnitudes and phases, sequences and distributions qualify as such.
Label position	Enumeration	↑ Above ↓ Below ← Left → Right ↖ Above left ↗ Above right ↙ Below left ↘ Below right Default: ← Left	Position of the label relative to the position.
Show approximate value	boolean	True or false Default: true	When ticked, will show an approximate version of the value of the targeted object at a the given x next to the value of the simplified expression.
Rounding	number	Default: 3	Rounding of the approximate value.
Display style	Enumeration	• • • Default:	Style of the vertical bar of the cursor.
Target's value position	Enumeration	Next to target With label Hidden Default: Next to target	Position of the target's value on the x cursor. When using "Next to target", it will be at the intersection between the target and the cursor vertical bar, while "With label" puts it just below the name of the cursor and it's position.

Sequences

Property	Type	Value	Comment
Show points	boolean	True or false Default: true	Sequences are be displayed using points at each integer the points where the sequence is defined. Unticking this hides the points.
Show dashed lines	boolean	True or false Default: true	Sequences are displayed dashed lines between at the points where the sequence is defined. Unticking this hides the dashed lines.
Default expression	Dictionary (fixed length at 1, key is a number, value an expression)	var[n+k] = expression Default: var=u, k=1, expression=n u[n+1] = n	Note: The expression is being defined through the n variable. You can use the array-syntax to access previous value. For example, for the variable u, you can define u[n+1] depending on u[n] or u[n+2] depending on u[n] and u[n+1] for recursive definition.
Initialisation values	Dictionary (key is a number, value an expression	var[k] = expr Default: var=u, k=0, expr=1 u[0] = 1	Note: You need as many initialisation values (which can be added through the "Add entry button" and removed with the trash buttons) as k.
Label position	Enumeration	↑ Above ↓ Below ← Left → Right ↖ Above left ↗ Above right ↙ Below left ↘ Below right Default: ← Left	Position of the label relative to the position.
Label's X position	number	Default: 1	Base position for the label of the sequence based on the specified x-axis position (integer) and it's corresponding y-axis of the sequence.

Distributions

Property	Type	Value	Comment
Label position	Enumeration	↑ Above ↓ Below ← Left → Right ↖ Above left ↗ Above right ↙ Below left ↘ Below right Default: ← Left	Position of the label relative to the position.
Label's X position	number	Default: 1	Base position for the label of the distribution based on the specified x-axis position and it's corresponding y-axis of the distribution.
Probabilities list	Dictionary (key is a number, value an number)	P(var=k) = value Default: var=X, k=0, expr=1 P(X=0) = 0	Note: You need as many probabilities as needed (which can be added through the "Add entry button" and removed with the trash buttons) as k. The displayed graph will be the distribution function.