Tracking changes as 3D graphics
  


It is often very important to see how the result of some analysis changes through time. If that result is a number, you can simply draw changes as function of one variable - time (use Instrument values log ). But, if the result is a signal, for example some FFT sequence, you can track its changes through the time by creating a 3D graphics. Each time FFT values change, all its values will be added as one new column in a 3D graphics. You can perform this on FFT window but also for any other signal or analysis result window in SIGVIEW.

You can perform this function in SIGVIEW by choosing Signal tools/Track changes as 3D graphics option from the main menu. You will first have to determine the number of columns in 3D graphics, i.e. how many last signal changes will be stored.

Each time signal the origin signal changes, one new column containing this new signal will be added to 3D graphics and the oldest column will be removed.

X-axis unit will be initially marked as change, i.e. the number of signal changes, and the Y-axis units will be the same as for signals X-axis. After few signals are added to the 3D graphics, X-axis unit and range will be detected automatically by backtracking through the analysis chain to the root signal window. If  X values are equidistant (i.e. difference between two consecutive values is always the same), those will be display on X-axis of the 3D-graphics. If not, X-axis will switch again to a "change" unit where each new signal will simply be labeled with its index, i.e. 0,1,2,3,4,...

If the length of origin signal changes (for example by zooming it in/out), its further changes will not be added to the 3D graphics until you return the signal to the previous (original) length.

For more information see: Track analysis results through time as 3D graphics and Basic 3D operations
Tracking changes as 3D graphics