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public:vievs_manual:exercises_process_your_first_session

## Start VieVS

Start matlab and change the Current folder to your VieVS-WORK directory, e.g. D:/VieVS/WORK/ . Run the GUI by writing vievs in the command window and press Enter.

Go to File - Set input files, click on Browse for sessions and select your desired NGS file. The session should appear in the listbox.

## Change output subfolder

The default parametrization can be used, but we will change the output subfolder to find the results more easily: As depicted in the Figure below, we go to Run - Run options and write e.g. myFirstSession into one subdirectory. The results will then be saved in VieVS/DATA/LEVELx/ myFirstSession/*.mat where x stands for a number (1 to 5). The estimated parameters will be saved in folder LEVEL3.

## Run VieVS

To start the processing, simply click on Save + Run. The processing of one session takes roughly between ten seconds and one minute, depending on the number of observations and estimated parameters. If the processing was successful, a residual plot should appear, similar to the plot in the Fig. below.

The estimated parameters are saved in a matlab binary file in VieVS/DATA/LEVEL3/ subfolder/x_sessionname, e.g. VieVS/DATA/LEVEL3/myFirstSession/x_13FEB25XA_N004.mat. More information about the output and results can be found in Chapters Output and the plotting tool.

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