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描述性统计量

峰值、RMS 水平、峰间幅值、波峰因子、动态时间规整、CUSUM 控制图、编辑距离

使用 findpeaks 定位信号的局部最大值,并按高度、宽度或相对高差对峰值进行排序。使用 peak2rms 函数确定信号的波峰因子,并计算常见的描述性统计量,如最大值、最小值、标准差和 RMS 水平。在更大的数据集中搜索关注的信号,并按时间对齐信号。定位信号突然变化或漂移出目标范围的点。对信号添加标签以用于分析或机器和深度学习应用。

App

信号分析器Visualize and compare multiple signals and spectra
信号标注器Label signal attributes, regions, and points of interest

函数

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cummax累积最大值
cummin累积最小值
envelopeSignal envelope
max数组的最大元素
mean数组的均值
meanfreqMean frequency
medfreqMedian frequency
median数组的中位数值
min数组的最小元素
movmad移动中位数绝对偏差
movmedian移动中位数
peak2peakMaximum-to-minimum difference
peak2rmsPeak-magnitude-to-RMS ratio
rmsRoot-mean-square level
rssqRoot-sum-of-squares level
seqperiodCompute period of sequence
std标准差
var方差
alignsignalsAlign two signals by delaying earliest signal
cusumDetect small changes in mean using cumulative sum
dtwDistance between signals using dynamic time warping
edrEdit distance on real signals
findchangeptsFind abrupt changes in signal
finddelayEstimate delay(s) between signals
findpeaksFind local maxima
findsignalFind signal location using similarity search
labeledSignalSetCreate labeled signal set
signalLabelDefinitionCreate signal label definition
countlabelsCount number of unique labels
folders2labelsGet list of labels from folder names
splitlabelsFind indices to split labels according to specified proportions
signalMaskModify and convert signal masks and extract signal regions of interest
binmask2sigroiConvert binary mask to matrix of ROI limits
extendsigroiExtend signal regions of interest to left and right
extractsigroiExtract signal regions of interest
mergesigroiMerge signal regions of interest
removesigroiRemove signal regions of interest
shortensigroiShorten signal regions of interest from left and right
sigroi2binmaskConvert matrix of ROI limits to binary mask

主题

RMS Value of Periodic Waveforms

Find the root mean square value of a sine wave, a square wave, and a rectangular pulse train.

在数据中查找峰值

定位一组数据中的局部最大值,并确定这些峰值是否周期性出现。

Prominence

The prominence of a peak measures how much the peak stands out due to its intrinsic height and its location relative to other peaks.

Human Activity Recognition Simulink Model for Smartphone Deployment (Statistics and Machine Learning Toolbox)

Generate code from a classification Simulink® model prepared for deployment to a smartphone.

Choose an App to Label Ground Truth Data

Decide which app to use to label ground truth data: Image Labeler, Video Labeler, Ground Truth Labeler, Lidar Labeler, Signal Labeler, or Audio Labeler.

特色示例