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Comparing Two Spectra in Two Windows

A common necessity is to compare two spectra. There are different solutions for different circumstances.
One thing is to compare the same kind of experiment applied to two different samples or to the same sample at different times.
Another thing is to correlate two different experiments applied to the same sample.
Here we explain how to arrange two windows to compare their contents. This is a general and fast solution, but by no means the only solution provided by iNMR.


Just press the y key. It does what you need in the most common case.

How to Synchronize Two Windows:

Step 1

Open and process the two spectra.

Step 2

Choose Window > Tile Vertically (or Tile Horizontally, or Do Not Tile, according to your tastes).

Step 3

From the same menu, either choose Synchronize, if you have applied the same experiment to two different samples, or choose Smart Marks, if you have applied two different experiments to the same sample. There's an exception: Synchronize is the best choice to compare two homo-nuclear correlation experiments, for example a NOESY with the TOCSY of the same sample.

Synchronize: the navigation commands imparted to a window (zoom, cut, panning, etc...) are sent to the other window too. Marks and the Cross-Hair tool are duplicated as well.

Smart Marks: Only the marks are duplicated, and only when the observed nucleus is the same. If there is an homo-nuclear 2-D experiment, the horizontal marks are copied from the vertical marks.

Step 4

To halt the mechanisms above, choose the same command again.

If you need to tile and/or synchronize more than two windows, use the command Tile & Synchronize. It opens a dialog where you can also set the order in which the windows will be tiled, from left to right and from top to bottom.

An alternative to sychronization is the Global Cross-Hair, found under the Tools menu.

With the Overlay Manager you can see both spectra into the same window and calculate their difference.

Related Topics

Printing Your Spectra Always in the Same Way

Creating a Poster

Tabulating the Integrals of a Series of Spectra


Web Tutorial

Visual Guide to Comparing 2 Spectra