增加信号中的数据点 [英] Increase data points in signal

问题描述

我的输入数据集为32点.现在，我想通过平均点上的数据将这些32点转换为240点.

I have an input data set of 32 points. Now I want to convert these 32 points to 240 points by averaging the data over the points.

我想到先绘制出我拥有的32个采样点，然后近似绘制曲线并以更高的采样频率获取数据，从而获得240个点.

I thought of plotting the 32 sample points which I have and then by approximately plotting the curve and taking data at a higher sampling frequency so as to obtain 240 points.

我无法理解如何在MATLAB中执行此操作.我从某些来源获得帮助，但无法提出任何解决方案.该怎么办?

I am not able to understand how to do this in MATLAB. I took help from some sources, but I was not able to come up with any solution. How can this be done?

简而言之，我想通过近似信号将离散数据集的"x"个样本转换为新数据集的"y"个样本.在这里x > y或x < y.

In short, I want to convert 'x' samples of discrete data set to 'y' samples of new data set by approximating the signal. Here x > y or also x < y.

推荐答案

resample做您想要的事情，

newdata = resample(data,240,32);

例如:

a = 1 : 32;
b = resample(a,240,32);
t = 1 : 32;
t1 = linspace(1,32,240);
plot(t,a);hold on;plot(t1,b,'r');

最后的噪声可能是由于尖锐的滤波器引起的，240/32太高了.

The noise at the end is probably because of sharp filter, 240/32 is too high.

resample实际上做得很好，

a = randi(10,[1 100]);
b = resample(a,240,100);
t = 1 : 100;
t1 = linspace(1,100,240);
plot(t,a);hold on;plot(t1,b,'r')

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