Plot a nx2 matrix as points

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Jorge Luis Paredes Estacio
编辑： Pranavkumar Mallela 2023-7-27
Hello, I have different nx2 matrices as outputs from earhquake signals, where n can vary. I would like to plot these matrices as points where n is the number of points and the first and second columns contain the x and y value for each point. Let us say I have a matrix A as follow:
A[0.5 2; 1.0 -0.8; 1.5 -2.5]
Herein, (0.5,2), (1.0, -0.8), and (1.5, -2.5) would the coordinates of the points I would like to plot. Thank you for your response.

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采纳的回答

Torsten
Torsten 2023-7-18
移动：Torsten 2023-7-18
Ran in:
A=[0.5 2; 1.0 -0.8; 1.5 -2.5];
plot(A(:,1),A(:,2),'o')

更多回答（1 个）

Pranavkumar Mallela
编辑：Pranavkumar Mallela 2023-7-27
Ran in:
Hi Jorge,
I understand that you want to plot the points obtained from a given nx2 matrix.
It can be done by extracting the x, y coordinates using array indexing. The graph can be plotted using the 'plot' function. Using '-*' in the 'plot' function will help you see the points.
Please find the code below:
A = [0.5 2; 1.0 -0.8; 1.5 -2.5]
A = 3×2
0.5000 2.0000 1.0000 -0.8000 1.5000 -2.5000
x = A(:,1)
x = 3×1
0.5000 1.0000 1.5000
y = A(:,2)
y = 3×1
2.0000 -0.8000 -2.5000
plot(x, y, '-*')
For more information regarding extracting points, please refer the following documentation: https://www.mathworks.com/help/matlab/math/array-indexing.html
For more information regarding the 'plot' function, please refer the following documentation: https://www.mathworks.com/help/matlab/ref/plot.html
Hope this helps! Thanks!
  1 个评论
Jorge Luis Paredes Estacio
Jorge Luis Paredes Estacio 2023-7-18
Hi. Thank you for your answer. However, I do not want to plot a line, I just want to plot them as shaded points on top another plot that contains the earthquake signal as lines.

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