How do I change the marker size for a plot?

5,087 次查看(过去 30 天)
Im trying to set the marker size on a plot but having no luck, heres my code
this works fine
plot(
x , x^2,'-k*',...
x , x^3,'-ko',...
x , x^4,'-k' )
but when i try and set marker size it does not
plot(
x , x^2,'-k*',...
x , x^3,'-ko','MarkerSize',12,...
x , x^4,'-k' )
what do I need to do?

采纳的回答

Oleg Komarov
Oleg Komarov 2011-4-30
编辑:MathWorks Support Team 2018-11-8
You can change the marker size for a line plot by setting the “MarkerSize” property, either as a name-value pair or by accessing the “Line” object.
Name-value pair:
If you set this property as a name-value pair with the “plot” function, you must set it after all the x,y pairs. Name-value pair settings apply to all the plotted lines. To use a different marker size for each line, use separate “plot” commands. For example:
plot(x,x^2,'-k*', 'MarkerSize',20)
hold on
plot(x,x^3,'-ko','MarkerSize',12)
plot(x,x^4,'-k' )
hold off
Accessing the “Line” object:
Alternatively, return the “Line” objects as an output argument from the “plot” function and then set the “MarkerSize” property for each object separately.
p = plot(x,x^2,'-k*', x,x^3,'-ko', x,x^4,'-k' )
p(1).MarkerSize = 20;
p(2).MarkerSize = 12;
  3 个评论
Sreekar Sai Ranganathan
Is there a way to set this globally at startup for all plots?
For e.g., for line width of plots, I found that adding the following line in startup.m does it. Is there a similar property for the default marker size?
set(groot,'defaultLineLineWidth',1.3);
Sreekar Sai Ranganathan
Nvm, figured it out. The following works:
set(groot,'defaultLineMarkerSize',4);
Also see this answer, if anyone needs something similar.

请先登录,再进行评论。

更多回答(3 个)

Jan
Jan 2011-4-30
plot(x, x^2,'-k*');
hold('on');
plot(x, x^3,'-ko','MarkerSize', 12);
plot(x, x^4,'-k');
  2 个评论
Leo Simon
Leo Simon 2014-5-22
For some obscure reason, MarkerSize is not consistently used. When you use scatter, you need to set 'SizeData' instead of 'MarkerSize'. Also, the scale of SizeData is different from that of MarkerSize' E.g.,
h = scatter(rand,rand,'b','filled'); set(h,'SizeData',96);
Michelle Hirsch
Michelle Hirsch 2016-1-29
The difference is subtle, but intentional. It stems from the different use cases.
MarkerSize is used to control the overall size of markers, just like the overall width of a line with LineWidth or font size. The units are in points, just like LineWidth.
Scatter is used to actually scale the marker sizes based on data. Specifically, the area of the marker is proportional to the value. This is why the units are in points squared.

请先登录,再进行评论。


Matt Fig
Matt Fig 2011-4-30
To make this type of thing much easier, you could download this code so that all these options are available from a simple mouse click:
  3 个评论
Michelle Hirsch
Michelle Hirsch 2016-1-29
You can also enable a context menu for changing line and marker properties just by enabling plot edit mode. Click on the button in the Figure toolbar with an arrow on it, then right click on your line.

请先登录,再进行评论。


Hari Desanur
Hari Desanur 2016-11-15
The Marker Size property for a particular line can be set using line object handles. For example -
l = plot(x1,y1,'*-',x2,y2,'*-');
l(1).MarkerSize = 8; % set marker size of 8 for the first line (x1,y1)
l(2).MarkerSize = 12;
  1 个评论
P_L
P_L 2019-4-18
Hi there and what if you wanted to chnage the colours of 'ko' data points so that they are filled for example with 'b'
Many thanks

请先登录,再进行评论。

类别

Help CenterFile Exchange 中查找有关 Formatting and Annotation 的更多信息

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by