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Ying Wu


Last seen: 1 giorno ago Active since 2021

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Using diff() or gradient() or other methods to solve the local slope of a set of discrete point?
Hi, I have a set of x and y, each has 44 values, and I use the following method to solve the local slope of this curve. The two...

circa 14 ore ago | 1 answer | 0

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answer

Question


Why thd() function captures incorrect harmonics?
Hi, I use thd() to calculate one time-domain singal, and I try three commands but all fails. Can anyone help me to solve this qu...

1 giorno ago | 0 answers | 0

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answers

Question


How to plot envelope of a signal
Hi, I have trouble in plotting a smooth envelope of a signal using the envelope function in Matlab or the hilbert method. The ti...

1 giorno ago | 1 answer | 0

1

answer

Question


Simulated and predicted response of time-series idnlgrey model in Matlab
I have build an idnlgrey (nonlinear grey box) model using time-series dataset, and the model structure is an ODE system includin...

3 mesi ago | 1 answer | 0

1

answer

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How to recover .m file lost due to the abnormal termination
Hi, when I run a parallel for-loop in my code.m file, the maltab is terminatted abnormally. And when I reopen the matlab, all th...

5 mesi ago | 1 answer | 0

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answer

Question


How to find intersection for two lines composed of multiple points (no expression)
Hi, my line1 (x1, y1) and line2 (x2, y2) are plotted using a series of points. And I don't know the exact experssion for these t...

11 mesi ago | 0 answers | 0

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answers

Question


How to remove ticks of right y-axis when plot two y-axes figure using yyaxis
Hi, when I use yyaxis left and yyaxis right to plot two y-axes figure, the y-ticks would be generated automatically. And I want ...

11 mesi ago | 1 answer | 0

1

answer

Question


plot 3D grid using mesh() with lack of individual data
Hi, I want to use mesh to plot 3D grids with the format of mesh(x, y, z). My z is a 47*11 matrix, in which the 7 column actually...

12 mesi ago | 1 answer | 0

1

answer

Question


Show the xticks in the view of 2D
Hi, I use surf to plot a 3D surface, see below And I want to see it in 2D view, so I use view(2), and I get the figure below....

12 mesi ago | 1 answer | 0

1

answer

Question


How to solve a 2nd-order ODE system with space-dependent variable with ODE45?
Hi, I use ode45 function to solve the following 2nd-order ODE system: where X(t) and Y(t) are function of time, and the par...

circa un anno ago | 1 answer | 0

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answer