Thermonicolet Omnic Software User's Guide 6.1 (PDF) - Charles E ...

Multiplying
a spectrum
by a number
Use Multiply in the Process menu to multiply each data point in a spectrum by a
number of your choice. This is useful when you want to scale a spectrum so that
data of very different intensities can be compared. By making the intensity of a
peak in one spectrum match that of the same peak in another spectrum, you can
see how the relative intensities of the other peaks compare.
Multiply a spectrum by a number
1. Select the spectrum that you want to multiply.
2. Choose Multiply from the Process menu.
The Multiply dialog box requests the number to be used.
3. Type a number in the text box.
4. Choose OK.
The spectrum is multiplied by the number you entered and displayed as a new
spectrum in the same spectral window.
Adding spectra
Use Add in the Process menu to add together two spectra that have the same
Y-axis unit. When spectra are added, each data point of one spectrum is added to the
corresponding data point of the other spectrum.
If only one of the spectra contains data points in a spectral region, the Y value of the
other spectrum is considered to be zero in that region when the spectra are added.
Add a spectrum to another spectrum
1. Select the two spectra you want to add together.
(Hold down the Control key when you select the second spectrum.) The
spectra must be in the same spectral window. If they are not, first copy and
paste one of the spectra into the window that contains the other.
2. Choose Add from the Process menu.
The spectra are added together and the result is displayed in the window that
contains the original spectra.
224 Thermo Nicolet