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INSIGHT Software
Operation
Thermo Scientific Evolution 200 Series User Guide 79
Related Topics
About Smoothing
Converting Scan Data to a Derivative
Converting Scan Data to Other Units
Adding Two Scan Spectra
Normalizing Scan Data
Subtracting a Scan Spectrum
Ratioing Two Scan Spectra
Averaging Scan Spectra
Adding, Subtracting, Multiplying or Dividing Scan Data by a Factor
Finding Peaks in Scan Data
Finding Value Level Crossings in Scan Data
About Smoothing
The smoothing feature of INSIGHT software uses a Savitzky-Golay algorithm modified to
reduce high frequency breakthrough; that is, to reduce noise in the spectrum. The algorithm
is based on performing a least-squares linear regression fit of a polynomial of order k over at
least k+1 data points around each point in the spectrum.
Converting Scan Data to a Derivative
Use Derivative in the Math menu to convert scan data to the first, second, third or fourth
derivative.
Y To convert scan data to a derivative
1. Choose Math (menu) > Derivative.
The selected spectrum appears in the Operands pane.
The workbook spectra are listed at the left. To add others:
a. Click Browse.
b. Select a folder in the left pane (use the features above it to navigate), a workbook in
the middle pane, and spectra in the upper-right pane. To select multiple spectra, hold
down Shift or Ctrl. Selected spectra appear in the lower-right pane.
c. Click OK. Each added spectrum is listed with asterisks at the beginning of its name
to indicate the data is not in the current workbook.
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