iPlotCSV User Guide

Median value of the column

Standard deviation (sample)

Variance (sample)

Root mean square value

Minimum value in the column

Maximum value in the column

Difference between max and min values

Nth percentile value

Third standardized moment (asymmetry)

Fourth standardized moment (tail heaviness)

Frequency distribution across bins

Cumulative running average

Cumulative running standard deviation

RMS over a sliding window (vibration level over time)

Least-squares polynomial trendline with equation and R²

Fit exponential, power, logarithmic, or sine models with equation and R²

Ratio of peak value to RMS value

SNR estimate in dB using FFT (signal band vs noise)

Simple moving average with configurable window

Exponentially weighted moving average

Linearly weighted moving average

Remove spikes and outliers while keeping edges sharp

Polynomial smoothing that preserves peak shape; optional derivative

Attenuate frequencies above cutoff

Attenuate frequencies below cutoff

Pass frequencies within a range

Reject frequencies within a range (notch filter)

Remove a single frequency such as 50/60 Hz mains hum

Running total over time (e.g. flow rate → volume, acceleration → velocity)

Derivative over time (e.g. volume → flow rate, position → velocity)

Signal envelope via Hilbert transform

Find peaks or valleys by prominence, height, and spacing

Find where the signal crosses zero or any level

Remove linear trend from signal

Running cumulative sum of all values

First-order difference (y[i] - y[i-1])

Keep every Nth sample (no anti-alias filter; low-pass first if needed)

Amplitude spectrum: a sine of amplitude A shows a peak of A

Frequency spectrum phase

Power per frequency bin in units² (RMS²)

PSD in units²/Hz (Welch averaging); integrates to the mean square

Transfer function H1 = Gxy/Gxx between an input and this output signal

How linearly related two signals are at each frequency (0–1)

1/1 or 1/3 octave band levels (acoustics, vibration)

Peak SDOF response vs natural frequency for shock/transient events

Multiply all values by a constant factor

Add a constant value to all data points

Take the absolute value of each data point

Multiply all values by -1

Take the reciprocal of each value (zero becomes NaN)

Logarithm of each value (non-positive becomes NaN)

Raise each value to a given exponent

Restrict values to a min/max range

Scale values to [0, 1] range based on min/max

Transform to zero mean and unit variance

Correlation of a signal with a delayed copy of itself

Correlation vs lag; the peak shows the delay between two signals

Convert single-gauge strain to stress with material properties

Convert 3-gauge rosette strain to stresses (principal, von Mises, etc.)

Estimate life/damage from stress amplitudes with mean-stress correction

Perform rainflow counting and output cumulative/incremental fatigue damage

ASTM E1049 rainflow cycle counts per load range

Compute principal strains, Mohr circle components, and principal direction

Numerical strain-rate with optional smoothing

Numerical stress-rate with optional smoothing

Compensate measured strain using temperature and apparent-strain coefficient

Estimate modulus or stress/strain from load and strain data

Compute factor of safety, margin, or utilization against material allowables

Compute beam bending stress from moment or center-point force

Compute torsional shear stress tau = T*r/J

Combine bending and torsion to compute von Mises, max shear, or component stresses

Constant upper limit line

Constant lower limit line

Reference column ± tolerance percentage

Rolling min/max envelope