Numeric Project Properties

Overview

When creating numeric project properties additional options need to be defined, including the units, ratios and any relevant equations that you want to add.

Version: 1.27+ (Oct 2020)

Usage: Data --> Create project property...

Creating numeric project properties

When creating a numeric project property, the first two steps are similar to creating a text project property. Remember you can add the property to multiple Analysis Groups should you wish.

Additional information must be provided:

Whether the property is a ratio property; this affects the options provided in the unit group dropdowns, especially when creating gas or molecular project properties. Only select this if the property is going to be based on an equation of the form a/b. This will fix the unit group to be Unitless.
The unit group with which the numeric measurement is associated. By default we select the Unitless unit group since we imagine you will often be creating new ratios, which are typically unitless, however you are free to use any of the unit groups available in p:IGI+; this will allow unit conversions on your new property within the unit group.
The default unit – by default we choose the base unit for the unit group you select. For example in the Unitless unit group the base unit is the Euclid (Euc) which is the natural non-dimensional unit, but you could choose to show the result by default in %.
The default number of decimal places to show in the page views. By default we set this to 1 decimal place, but you can adjust if you need to.
The default ratio with which to show the result. Set this to NoRatio if you don’t want to allow users to modify the ratio, but if the property you are creating is a ratio, then set this to the natural (a/b) or normalised (a/(a+b)) ratio as desired. Once you have assigned a ratio other than NoRatio, users will be able to change the displayed ratio.

You can optionally add an equation, but more on that in the page on Creating project property equations. If you have added an equation, but change your mind, you can delete the equation with the red cross next to it.

Selecting Create will build the property and add it to be project. This could take a small amount of time in large projects if you define an equation as this equation will be evaluated for all samples in the project with the necessary inputs.