Display mode
The display mode allows you to watch your signals, easily switching between them.
Thanks to an interactive interface, you can filter your signal, select some locations to show, watch different epochs and verify any variation during the time, change the showed amount of time and, finally, save a segment of any signal.
First of all, in the following interface you have to select the directory which contains all your signals.
Here you can insert the name of the directory (with its path) in the text box, or search it on your computer through the button next to it.
Note that if you have switched between study modalities, for example if you computed a guided study or if you used it before in the same session, you will find the previously setted data directory in the text box, so you can change or use it again.
Now you can push the Next > button and go to watch your signals.
In the following interface you can watch the first of the signals' files contained in your data directory.
Let's learn how this interface works
To switch between signals you can use the < Previous button to show the previous case, or the Next > button to show the following one.
Otherwise, it is possible to select a specific time series, through the 👤 button on the toolbar.
To manually translate forward and back the time series, you can use the arrows buttons.
Here, you can go a second or an epoch forward or backwards with the internal buttons or to the external ones, respectively.
In this case an epoch is intended as the same amount of time as the one showed by the interface.
You can also continuously and automatically go forward and backwards in time by pushing the arrows button in the toolbar of this interface.
Through the toolbar you can also show a chosen istant of time, go to the end of the signal or to its beginning.
To have a better look to the signal, you can choose the amount of time to show, which will correspond to an epoch when you forward and backwards in it.
You can also zoom in on it, using a value greater than one, or to decrease it by using a value lower than one.
You can also choose to watch only some locations.
In this case, the toolbox will open an interface where you can select the wished locations, and to select more than one locations you have to have the CTRL key pressed, or you can select more contiguous locations by click on the first with the mouse or your pad and on the last having the Shift key (⇧) pressed on your keyboard.
You can choose to filter your signal through a bandpass filter, and so decide if you want to see the filtered or the non-filtered signal.
You can always change the cut frequencies and, when you switch from a subject to another one, the cut frequency remain stored to allow you to filter each signal using the same parameters.
Moreover, in this interface you have the possibility to re-reference your signal.
You can choose to select a location as reference and, inthis case, Athena subtracts the time series value to the time series of each location, computing it for each sample.
You can also choose to use as reference the average related to some locations, by selecting the wished locations, and the overall average, by selecting the last element of the list, named "Average".
Once the visual inspection is finished, you can extract and save a segment of the signal, choosing the starting time and the amount of time to save.
The interface will show you the initial instant of time and the final one through a black and a red vertical line, respectively, to facilitate you.
Furthermore, the saved locations will be the only ones showed, so a possibility is to extract the recordings relative to the only "good" locations and take advantage of the automatic locations recognizer used in the preprocessing phase of Athena, to use only the common locations during the study.
Notice that you can both save the filtered and the nonfiltered signal: the saved time series is the one showed (so, you can use the filtered/nonfiltered switch button to select it.
Normally, Athena is able to read the necessary information, such as sampling frequency and locations relative to each record, automatically from the file of each signal.
If some of them are not inside the data file, you can always set them through the respective buttons in the toolbar.
In particular, for the locations list an external file will be required, while for the sampling frequency just enter its value.
Finally, if you need some information can always use the help button, which will open this wiki in a web browser.
This mode also allows to use some speech commands by pressing the spacebar (you can find the list of commands in the speech command page of the wiki).
Some shortcuts are also provided by this interface, listed in the related page of the wiki.
When you have finished analyzing visually and extracting segments of signals, you can immediately start to perform a study with the pipeline offered by Athena, or perhaps continue the visual analysis in the frequency domain.
So go back to the initial interface and start your study right away!