Sample Selector is a tool for creating and editing
samples, or groups of data you compare across—they're
not "samples" in the statistical sense, but more like filters.
By default, a single sample exists: "All Data". With the Sample
Selector, you can create new samples to organize your data.
You can use samples to:
Compare across conditions
Narrow the scope of data analysis to a specific time range,
set of students, problem category, or unit of a curriculum (for example)
A sample is composed of one or more filters, specific
conditions that narrow down your sample.
Creating a sample
The general process for creating a sample is to:
Add a filter from the categories at the left to the composition
area at the right
Modify the filter to select the subset of data you're interested
in, saving it when done
View the sample preview table to see the effect of adding your filter,
making sure you don't have an empty set (ie, a filter or combination
of filters that exclude all transactions).
Name and describe the sample
Decide whether to share the sample with others who can view the
Save the sample
The effect of multiple filters
DataShop interprets each filter after the first as an additional
restriction on the data that is included in the sample. This is also known
as a logical "AND". You can see the results of multiple filters in the
sample preview as soon as all filters are "saved".
A workflow is a component-based process model that can be used to analyze, manipulate, or visualize data.
This page provides a list of the user's workflows as well as shared workflows created by other users.
To view an existing workflow, click on the workflow name or the "Edit Workflow" icon if you own the workflow, or the "View Workflow" icon if it's owned by another user.
There are two ways to create a workflow. The "Create new workflow" button, with the icon, can be used to create a new, empty workflow, or an existing workflow can be copied by clicking on the "Save as new workflow" icon .
Use either of the pencil icons to modify the workflow meta-data.
A workflow is a component-based process model that can be used to analyze, manipulate, or visualize data. Each component acts as a standalone program with its own inputs, options, and outputs. The inputs to each component can be data or files, and the output of each component is made available after the workflow has been run. A generic workflow might consist of the following steps.
import a tab-delimited file
analyze the file
visualize the results of the analysis component
Users create a workflow by dragging and dropping components into the tool and making connections between components. Clicking on the gear icon of any component allows the user to specify the component's options, e.g., the file location for an Import component.
Once the user has configured the components and connections, the workflow can be run and the results viewed by clicking on the magnifying glass -- either for the workflow itself or for any particular component. The results will open in a separate tab in the user's browser.