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==Turning traces on==
1D traces are views of a spectrum obtained from multi-dimensional data along some straight line in the data matrix.

Usually this line is selected along one of the dimensions of the spectrum.

Sparky allows viewing those traces if user types '''vS''' command (view slices).

Once the command is typed, two panels will be added on the bottom (for the X-trace) and right side (for the Y-trace) of spectrum window.

The data traces will be extracted along the cursor lines (see figure below). (To obtain Z-trace one will have to rotate the spectrum view so that Z dimension is shown along one of the cursor lines)
==Using traces to check quality of data fitting==
'''vS''' mode can be used to check quality of data fitting.

Note that there are more traces in the figure then you might expect. In each panel there is a noisy black spectrum - which is the actual data trace and a much smoother blue line. Traces shown in color other then black are those obtained from fitted peak intensities (obtained by '''pi''' - peak integrate - tool).

==Removing traces==

To remove 1D traces type '''vS''' again.

Note that traces will be printed with the '''pt''' tool - if this is not what you want - turn traces off and then prepare the image file for printing.

[[image:sparky-vS.png]]

[[Category:Sparky tutorials]]

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