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How can i fill a marker with color?

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Philipp Mueller
Philipp Mueller 2016-9-26
回答： MathWorks Support Team 2024-6-5
Hi,
I have two plots. How can I fill the marker in plot2? At the moment it is empty. With: plot(x(i),y(i),'s','MarkerFaceColor',colors(ID(i),:));???
Input_Matrix = textread('Rainflow_Input1.txt')
[zeilen,spalten]=size(Input_Matrix)
x = Input_Matrix(:,1)
y = Input_Matrix(:,2)
z = Input_Matrix(:,3)
colorbar('location','Manual', 'position', [0.93 0.1 0.02 0.81]);
a=30
scatter(x,y,a,z,'filled')
colorbar;
%http://stackoverflow.com/questions/15814068/pcolor-in-scatter-plot-matlab
[dummy ID]=sort(z);
colors=colormap(jet(length(z)));
figure
for i=1:length(z)
plot(x(i),y(i),'s','Color',colors(ID(i),:));
hold on
end

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采纳的回答

MathWorks Support Team
If you are only plotting markers, and not any lines, you can create a plot with filled markers by calling the "scatter" function with the "filled" option. 
x = rand(1,50);
y = rand(1,50);
colors = jet(numel(x));
scatter(x,y,[],colors,'filled','s')
If you need to use the "plot" function, you can set the "MarkerFaceColor" property. If you want the edges of the markers to match, set the "MarkerEdgeColor" property to the same color values. 
figure
hold on
for i=1:50
plot(x(i),y(i),'s','MarkerFaceColor',colors(i,:),'MarkerEdgeColor',colors(i,:));
end
hold off
Also, you don’t need to call "hold on" at each iteration of the loop. You can call it once just before plotting. Call "hold off" when you’re all done. 
You can find more examples of setting marker colors in the documentation:
Specify Marker Colors in a Scatter Plot
https://www.mathworks.com/help/matlab/creating_plots/specify-plot-colors.html#mw_9ff0ca4d-33b0-4b96-b5b5-0f68092b0211

更多回答（3 个）

Walter Roberson
Walter Roberson 2016-9-26
Yes, you can use MarkerFaceColor to fill markers.
Note that only one 'MarkerFaceColor' will be paid attention to for any plot() call, even if you are requesting to plot multiple items.
As you are not drawing lines, you should consider instead using scatter(). You can specify the color of each point for scatter, and use the 'filled' option.
Forrest Mobley
Forrest Mobley 2018-8-19
It's also doable to just choose whatever predefined color as when choosing what your marker color is.
For example: plot(x,y,'or','MarkerFaceColor','r');
This will give your marker face and marker outline the same color, red.
  2 个评论
KAE
KAE 2019-1-24
If you aren't picking the color yourself, but it's getting set by the plot color order, you can still fill it with the same color as the marker edges or line plot as follows,
x = rand(1,5); y = rand(1,5); % Example data
h1 = plot(x, y, '-o'); % Plot a line and circle markers
set(h1, 'markerfacecolor', get(h1, 'color')); % Use same color to fill in markers

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MathWorks Support Team
If you are only plotting markers, and not any lines, you can create a plot with filled markers by calling the scatter function with the 'filled' option.
scatter(x,y,[],colors,'filled','s')
If you need to use the plot function, you can set the MarkerFaceColor property. If you want the edges of the markers to match, set the MarkerEdgeColor property to the same color values.
figure
hold on
for i=1:length(z)
plot(x(i),y(i),'s','MarkerFaceColor',colors(ID(i),:), ...
'MarkerEdgeColor',colors(ID(i),:));
end
hold off
If you want the markers to have the same color as the axes background color, set the MarkerFaceColor property to 'auto' to fill the markers with that color.
Also, you don’t need to call hold on at each iteration of the loop. You can call it once just before plotting. Call hold off when you’re all done.

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