Transfrom Data
Click the button or select menu item <Analysis><Transformation> to create new series. Select tool:
- Copy to exchange (X, Y), to exchange (Y, Z), transpose (X, Y) to (row number, X) or to (row number, Y), flip X or flip Y values, simulate data (Y values) with random error, to apply function.
- Linear to translate, scale, rotate data.
- Subtract to subtract or divide data on const, or to subtract baseline, or to subtract function you input. There is a feature to find and extract baseline.
- Formula to transform points.
- Normalize to normalize data between Y limits you define.
- Prune to skip or to combine rows (take the arithmetic mean or the harmonic mean or the geometric mean) and or exclude data out of limits X.
- Spikes to exclude random spikes or to exclude close points.
- Neighbours to exclude replicating points, or to exclude points near existing plot, or to exclude points near function.
- Smooth to apply Gaussian filter, or adjacent averaging, or Savitzky-Golay (least squares) smoothing, or Lowess (local regression smoothing), or Kalman filter, or low-pass FFT filter.
- There are two ways to find result (smoothed) data.
- When find in middle point result Y(Xn) = f(Xn-m/2,...Xn,...Xn+m/2).
- When find in last point result Y(Xn) = f(Xn-m,Xn-m+1,...Xn-1,Xn).
- Interpolate to generate a new curve with a constant spacing on the X axis.
- Differentiate to calculate derivatives. The Savitzky-Golay smoothing method is used with the polynomial degree 2.
- Integrate to calculate integrals.
- Convex Hull to construct a discrete Convex Hull as a new series.
- Procrustes analysis to find a new series.
- Filter to eliminate noise with FFT filters.
- In all dialogs you can modify properties of new series (formulas, parameters, color, radius and so on).
Formula
- It is possible to transform selected points ( u, v ) and create new series of points ( x, y ) in the form
- y( u, v ) = f2(u, v), x( u, v ) = f1(u, v). You can use parameters a, b, c, d in formula: Const; Medium values of x and y; Any Function or the Formula you created.
Notes:
Only variables u, v and parameters a, b, c, d are possible in formula expression.
Default value of parameters is 0. |
