如何测量波峰或波谷之间的周期? [英] How to measure the period between the peaks or lows of waves?

问题描述

我想测量图中所示的相邻波的波峰/波低之间的时间段.

I want to measure the period between the peaks/lows of the adjacent waves shown in the figure.

这是细胞中钙浓度的振荡行为.峰值不相同，因此我需要计算每个波的峰值/低点，获取与峰值/低点相关的相应时间，并找出相邻峰/低之间的差异.我已经存储了每次"0.01"的钙浓度值.

This is an oscillatory behavior of calcium concentration in a cell. The peaks are not the same, hence I would need to calculate the peak/lows for each wave, obtain the corresponding time associated with the peaks/lows, and find the difference between adjacent peaks/lows. I have stored the calcium concentration values for every time "0.01".

有人可以建议我如何编码吗?我宁愿使用较小的代码行.

Can anyone suggest me how I should code it? I would prefer to use smaller lines of code.

推荐答案

查看内置的

Look into the inbuilt findpeaks function that can return you the index of peaks in your signal.

您可以使用此方法通过先对信号进行平方来找到信号中的低点.这样的事情可能会起作用(我没有在MATLAB中尝试过，因此可能存在一些语法问题):

You could use this to also find the lows in your signal by first squaring your signal. Something like this could work (I haven't tried this in MATLAB so there could possibly be some syntax issues):

% Square the signal so that the lows become peaks
signal = signal .^ 2;

% Get the location of the peaks in terms of t (your time vector)
[~, peaksAndLows] = findpeaks(signal,t)

% Find the difference between consecutive peaks/lows
periodsBetweenPeaksAndLows = diff(peaksAndLows);

这篇关于如何测量波峰或波谷之间的周期?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！