データの解析

遅延、フィードバック、励起レベルなどのデータ特性の決定

関数

`bode`	動的システムのボード周波数応答
`bodemag`	周波数応答の振幅のみのボード線図
`idplot`	Plot input and output channels of estimation data (R2023a 以降)
`advice`	Analysis and recommendations for data or estimated linear models
`delayest`	データからの時間遅延 (デッドタイム) の推定
`isreal`	モデルパラメーターまたはデータ値が実数かどうかを判別
`realdata`	Determine whether `iddata` is based on real-valued signals
`checkFeedback`	Identify possible feedback data (R2023a 以降)
`pexcit`	Level of excitation of input signals
`impulseest`	Nonparametric impulse response estimation
`etfe`	経験的な伝達関数とピリオドグラムの推定
`spa`	スペクトル解析を使用した固定の周波数分解能による周波数応答の推定
`spafdr`	Estimate frequency response and spectrum using spectral analysis with frequency-dependent resolution
`dataPlotOptions`	Option set for `idplot` when plotting input/output estimation data contained in a timetable, numeric matrices, or an `iddata` object (R2023a 以降)

Is Your Data Ready for Modeling?
Before you start estimating models from data, you should check your data for the presence of any undesirable characteristics.
How to Plot Data in the App
After importing data into the System Identification app, as described in データの表現, you can plot the data.
How to Plot Data at the Command Line
The following table summarizes the commands available for plotting time-domain, frequency-domain, and frequency-response data.
How to Analyze Data Using the advice Command
You can use the advice command to analyze time- or frequency- domain data before estimating a model.
Identify Delay Using Transient-Response Plots
You can use transient-response plots to estimate the input delay, or dead time, of linear systems.