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How do I connect points in a scatter plot with a line?

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Matt
Matt el 15 de Jul. de 2014
Editada: MathWorks Support Team el 27 de Nov. de 2018
Hi
I plot a scatter for multiple points and i want to connect them using line. Below is my code. The plot i get is only scatter, I cant connect them through a line. Any help appreciated!
x=[1,2,3,4,5,6,7,8,9];
y=[1,2,3,4,5,6,7,8,9];
hold all
for i=1:8
scatter(x(i),y(i),'X')
line(x(i),y(i))
end
Thanks
Matt

Respuesta aceptada

Ben11
Ben11 el 15 de Jul. de 2014
Editada: MathWorks Support Team el 27 de Nov. de 2018
If you want to plot both markers and a line, you can use the plot function and specify a line style that includes marker symbols and a line style, such as '-x'. For example, this code plots a line with crosses at the data points.
plot(x,y,'-x')
If you are trying to plot only the first eight points, then use this code instead:
plot(x(1:8),y(1:8),'-x')
If you are plotting from a cell array, then use this code instead:
plot(cell2mat(x(1:8)),cell2mat(y(1:8)),'-x')
  2 comentarios
Matt
Matt el 15 de Jul. de 2014
Thanks! It works :)
Ben11
Ben11 el 15 de Jul. de 2014
Great! You can accept John's answer as I kind of use his to answer your question. Glad it helped!

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Más respuestas (2)

John D'Errico
John D'Errico el 15 de Jul. de 2014
You asked this question before! In fact, you asked exactly that question, but for some reason nobody managed to give a good answer.
plot(x(1:8),y(1:8),'b-x')
There is NO need for a loop. The above single line will plot x marks at each point, and connect them with a line, all in blue.
If you prefer to plot the line in blue, and the x marks in red, this will do it:
plot(x(1:8),y(1:8),'b-',x(1:8),y(1:8),'rx')
  3 comentarios
H ZETT M
H ZETT M el 18 de En. de 2017
Editada: H ZETT M el 18 de En. de 2017
Hey, this question is pretty old,but I want to know something similar. I got scattered points on a 2D surface and I want just to connect those points that are close to each other. Basically I want to say something like "connect the points that are in a range of 10m to each other" Any ideas how to do this ?
John D'Errico
John D'Errico el 18 de En. de 2017
@ZETT: This is a TOTALLY different question. Ask it as a question. A separate and new question.

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Brian B
Brian B el 15 de Jul. de 2014
Editada: Brian B el 15 de Jul. de 2014
Don't use a for loop:
x=[1,2,3,4,5,6,7,8,9];
y=[1,2,3,4,5,6,7,8,9];
hold on
scatter(x,y,'X')
line(x,y)
or just
plot(x,y,'-o')
  1 comentario
John D'Errico
John D'Errico el 15 de Jul. de 2014
Both of you have missed that for some reason, he wants to plot the first 8 elements.

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