Growth Rate Analysis¶

Access via the Calculate Growth Rates button in the left panel (enabled when size files are present in the loaded folder).

Growth rate analysis measures how the crystal grows along selected crystallographic directions over time, using size data from the CrystoGen simulation output.

Input Data¶

The analysis reads from these files (auto-detected in the loaded folder):

File	Contents
`size.csv`	Crystal dimension along each direction at each time step
Simulation parameters file	Lists available crystallographic directions
Summary file (optional)	Supersaturation and thermodynamic metadata

Configuration Dialog¶

When you click Calculate Growth Rates, a dialog opens with:

Direction Selection¶

A scrollable list of all available crystallographic directions from the simulation. Check any directions you want to include in the analysis.

X-Axis Mode¶

Mode	Behaviour
Auto (time if available)	Use the `time` column if present; fall back to row index
Force time column	Use `time`; error if column is missing
Use row index	Always use integer row index, ignore time

Output¶

Results are saved to aspects_output/ and include:

File	Contents
`growth_rates.csv`	Size vs time for each selected direction
Growth rate plots	Scatter/line plots per direction

Smoothing and Interpolation¶

After the initial analysis, a Smoothing dialog lets you post-process each data series:

Smoothing Methods¶

Method	Parameters	Description
None	—	Raw data
Moving Average	Window size (3–51, odd)	Rolling mean
Savitzky-Golay	Window, polynomial order	Polynomial fit in rolling window
Gaussian	Window size	Gaussian-weighted kernel
LOWESS	Window size	Locally weighted regression

Interpolation Methods¶

Method	Extra Points	Description
None	—	No interpolation
Linear	N points	Linear interpolation between data points
Cubic Spline	N points	Smooth cubic spline
Polynomial	N points	Polynomial fit

Extrapolation Methods¶

Method	Extra Points	Description
None	—	No extrapolation
Polynomial	N points	Extrapolate beyond data range
Linear	N points	Linear extrapolation

Legend Display Mode¶

Mode	Shows
Original only	Unprocessed data series
Processed only	Smoothed/interpolated series
Both	Both the original and processed series overlaid

Plotting Results¶

Growth rate results are automatically displayed in the Plotting Dialog after analysis. The X-axis is time (or row index), and the Y-axis is the crystal dimension along each direction.

Trendlines (linear or polynomial fit) can be added in the plotting dialog.

Notes¶

Multiple directions can be compared on the same plot
Smoothing settings are per-series, so different directions can use different filters
If the time column is present but non-monotonic, results may be unexpected — use "row index" mode in that case
Analysis can be cancelled from Tools → Active Threads. Cancellation takes effect at the next checkpoint (typically the start of each iteration), so there may be a short delay before the task stops.