Data Library
Last updated
Last updated
To go to the data library, click on the Library icon in the left tool bar.
In the data library you will see a list of all datasets that were identified in your database.
You can change the columns that are visible in the data set list by clicking on the column title.
By clicking on the arrows next to the title, you can alter the sorting of the datasets.
Another useful way to search through your datasets is by using the search bar on the left of the data list.
There are multiple ways to search for datasets:
Start typing and filter the datasets on this text
Specify a time range, only datasets where the start time is in this range will be visible
Select specific values for any of the metadata fields
Advanced search can be used to find all datasets where signal values match one or more specified conditions.
To create an advanced search query, first you have to select a reference dataset. This tells Marple which signal names are available. Once a reference dataset is selected, you can start adding filters. Each filter consists of:
Signal: you can select any signal present in the reference dataset, any function defined in the workspace or type the signal name yourself if it is not part of the reference dataset.
Operator: >, >=, <, <=, == and ≠ are available
Value: currently only numeric values are supported.
Multiple filters can be added, only datasets that comply with all filters will be returned. Advanced search will look for datasets that comply with each filter individually at some point in the dataset, not necessarily all at same point in time.
Click run to start the advanced search. This might take some time as it is a complex operation on a potentially huge set of data.
The advanced search will be applied on all the datasets which match your other search criteria (time range & metadata selection). When these settings change or you specify different filter values, your advanced search results become outdated and Marple will remind you to rerun your advanced search criteria.
To clear all the filters in the search bar press the circle arrow next to the search title.
Selecting data is very easy. You simply click on the checkbox next to the dataset.
To select all data in your data list, click the checkbox at the top of the dataset list.
When selecting files, you will see them appear in the right bottom of your screen, under Selected datasets.
After selecting your data, the next step is to click on the Visualise button to dive into your data!
If data is already visualised in the currently open project, you will see a graph icon nex to the data set.
If you click on a dataset, in the bar on the right of your screen, you will see an overview of all the available data that is available about this dataset.
This data is also called metadata.
If you want to show this metadata for your entire dataset, you can always change which columns are shown in your data list (see above #overview). This also allows you to sort on this data.
As an admin, in the Settings view, you can configure:
which data columns should be considered as metadata;
how these metadata columns should be displayed; and
which metadata should be shown by default in the library view and in what order.
Here you can also change which fields should be considered when defining datasets, effectively changing which datasets will be shown in the data library.
If the library is empty, it probably means that you do not have configured your data source. Contact your administrator or go to Setup and Configuration to connect your data source.
It could also mean that your filter is applied and no datasets match your selection. In that case, reset your filter by clicking on the 'Clear Filter' button next to the Search Filter in the left toolbar.
