News
Peak Explorer
description
Registration
Download
Guestbook
Links
e-mail

Рейтинг@Mail.ru

The Peak Explorer is intended for automatic processing of spectra, and also any plots having strongly expressed local maxima (peaks). The program automatically locates a position of the peak center of gravity (Center), coordinates X and Y of the top point of the peak ((x,y) of Top Point), calculates peak area (Area), standard deviation (sd(Area)) of Area (sd(Area)=sd(Area)) locates left (Left Border) and right (Right Border) boundaries of the peak and draws a linear background under the peak (Background). The Input Data Table and Grapher are situated in the Input Data window.

Input Data window
Input Data window

The Result Data Table is situated in the Result Data window. It is possible to save both Input Data Table and Result Data Table in the text file.

Result Data window
Result Data window

The Input Data text file can be represented by two ways:
1). The file contains two columns of numbers. The first column - coordinate X of plot, the second column - coordinate Y.
2). The file contains only one column of numbers - coordinate Y of plot. In this case it is necessary to set initial value of the coordinate X and X increment.
It is possible to change the Number of Rows in the Table (1024 by default, 65536 maximum).
To start the searching peak process it is necessary to select in the menu Plot the item Start to Peak Search. After finish of the searching peak process the result will be represented in the Result Data window. The linear background under peaks will be drawn by red lines. The plot options can be changed in the menu Plot -- > Plot Options...

For more correct description peaks are automatically fitted by Gaussian function:

Гауссиан

where p is the peak Center, A – peak Amplitude, Sigma - parameter Sigma which is approximately the width of the peak at half height Gamma (more correct: Gamma=2.355Sigma).

The standard deviations (sd) of p, A, Sigma, peak Area and also left and right peak boundaries (such as in the Result Table) are represented in the Gaussian Parameters Table too.

Gaussian Parameters window
Gaussian Parameters window

The Gaussian function will be drawn by green line. It is possible to print the plot.

Print window
Print window