Wayne King

数学工作

Last seen: 8 days ago|自2011年以来活跃

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I am a developer on the Wavelet Toolbox at MathWorks

免责声明：这里发布的任何建议或意见都是我自己的，绝不反映数学工程的建议。
Professional Interests: Signal Processing

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回答
了解CWT Morlet：时间和频率分辨率
Hi SungJo, the analytic Morlet wavelet used in the cwt() function and cwtfilterbank as 'amor' is defined in the frequency domain...

1年前|0

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analytical expression for Morse wavelet
摩尔斯小波在频域中定义，因此摩尔斯小波的分析表达式涉及积分。明显...

1年前|1

回答
How do I switch from Level to Frequency when performing discrete wavelet transforms?
Hi, The discrete wavelet transform divides the signal energy into octave bands. So the wavelet filtering at level J, approximate...

1年前|0

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How to plot scalogram in time period?
嗨，您可以做以下操作：fs = 1e3;t = 0：1/fs：1;x = cos（2*pi*32*t）。*（t> = 0.1＆t <0.3）+sin（2*pi*64*t）。WGNN ...

1年前|1

回答
How to plot scalogram in time period?
Hi Jan, can you try surf() instead of imagesc()? Alternatively, can you attach a sample time series along with the necessary inf...

1年前|1

回答
How to plot scalogram in time period?
嗨，1月，您没有提及您正在使用的版本，但是可以将数据放在等于whateve的行时间表中。

1年前|1

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从混合信号中提取信号成分
嗨，Sohel，对于给定的频率和信号长度，I_second和i_third的光谱在频率上不是delta功能...

1年前|0

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从混合信号中提取信号成分
Hi Sohel, May I first suggest that you clean this code up a bit. It isn't easy to follow exactly what kind of signals you are cr...

1年前|2

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How to reconstruct a signal from it's Wavelet transform using Mexican Hat wavelet
这不是错误。打电话时：COEFS = CWT（x，0.001：100，'mexh'）;您正在调用Legacy Cwt（）接口...

2years ago | 1

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旧版本和新版本的CWT（连续小波变换）以检测信号的突然变化
Supatat, You are free to use the old CWT API if you wish. However, we recommend the newer API for reasons I've tried to explain ...

3年前|0

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旧版本和新版本的CWT（连续小波变换）之间的区别
Hi Supatat, Some of this has been discussed here: //www.tianjin-qmedu.com/matlabcentral/answers/474889-why-the-old-version-...

3年前|1

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回答
how to do wavelet transformation in real time?
Hi are you using dsp.DyadicAnalysisFilterBank? In that case the input signal must be a multiple of four along its first dimensio...

3年前|0

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bug in cwt function
Hi Ziba, First of all, I would encourage you to use the new CWT interface as opposed to the legacy interface you are using here....

4年前|0

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没有COI的连续小波分析
嗨，埃文（Evan），CWT输出了用影响锥完成情节所需的一切。例如：加载科比；％这...

4年前|2

回答
MODWPT详细信息如何提供零相滤波？
MODWPTDETAILS actually projects the signal onto the various wavelet packet subspaces, that is what provides the zero-phase filte...

4年前|0

回答
Unable to open openExample('wavelet/XpwWaveletMLExample')
That example is part of MATLAB R2018a. The example was not shipped with the R2016a version of MATLAB.

4年前|0

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Mathworks/Physionet_ecg_data
一个由162个ECG记录和诊断标签组成的数据集。数据以128赫兹采样

4年前|10下载|

回答
可以在2D CWT中使用的其他小波？
Hi Michael, in order to use a wavelet in CWTFT2, we need to have the expression for the Fourier transform of the wavelet. The wa...

5 years ago | 1

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回答
关于using cwt function
嗨，亚历山大，对于CWT，不常用缩放函数。对于离散的分析，通常在...中定义了小波。

5 years ago | 0

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关于DWT中的拆卸
你好,亚历山大,我不认为有a trick here. The filter responses scale as you go down in resolution but that is becau...

5 years ago | 0

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关于DWT中的拆卸
嗨，亚历山大，＃是的，您是正确的，因为下采样会导致别名（或可能导致别名）。但是，分析文件...

5 years ago | 0

回答
1-D小波分解的Wenergy如何工作？？？
嗨，Alef，ED输出给出了每个级别的细节（小波）系数捕获的能量百分比，而EA ...

5 years ago | 0

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回答
无法通过使用转台将数据从行从行更改为列
您的工作空间中的数据是MATLAB表的形式吗？>> WHOS命令在您的工作空间中打印出什么？o ...

5 years ago | 0

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回答
如何在不使用DWT2小波的情况下执行2级DWT？
使用wavedec2（）允许您指定级别。

5 years ago | 0

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回答
what is the scaling function on wavelet in the matlab?
Hi Mohammad, I'm not sure this question is complete since you just wrote "1" in the body. The scaling function provides the low ...

5 years ago | 0

回答
错误的msg输入必须仅包含有限的实际非负整数。使用COIF1.3和Bior1.3代替HAAR
嗨，海军，我同意沃尔特的观点，我们需要更多信息。它有助于我们给我们一些示例数据，我们可以复制发行...

5 years ago | 1

回答
any body please explain me what is happening in swt command in matlab? swt in the sense stationary wavelet transform.
嗨，巴拉特，您是否阅读了有关固定小波变换的文献？这是要阅读的论文：

5 years ago | 0

回答
cwt.m normalization
Hi Simon, that energy normalization should be interpreted here in the correct way. With the CWT, we don't preserve the energy in...

5 years ago | 1

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cwt.m normalization
嗨，西蒙（Simon），已经对L1 Norm进行了标准图。在小波变换的许多其他用途中，习惯是n ...

5 years ago | 1

回答
如何从SYS8小波域进行反连续小波转换
Hi Rubio, Why would you want to do this? The CWT should be obtained at multiple scales and those scales should be logarithmicall...

5 years ago | 1

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Wayne King

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