Fill colour in a scatter plot

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Milan Kumar
Milan Kumar 2019-5-2
回答： Steven Lord 2024-7-9
I neet to fill the graph for with light grey colour and remaining graph with a darker shade. Also two different pattern as backgrounds can also work.

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回答（2 个）

Steven Lord
Steven Lord 2024-7-9
Ran in:
This wasn't an option when the question was originally asked, but if you're using release R2023a or later you could use xregion (and similarly yregion for shaded regions in a range of Y values.)
x = 1:10;
plot(x, x.^2);
xregion([3 8], FaceColor = 'r')
yregion([-Inf 64; 9 Inf], FaceColor = 'c')
SAI SRUJAN
SAI SRUJAN 2024-7-9
Hi Milan,
I understand that you are facing an issue to fill color in a scatter plot.
Please go through the following code sample to proceed further,
% Sample data
x = linspace(0, 10, 100);
y = 3*x + 5;
% Create scatter plot
scatter(x, y, 'b');
hold on;
x_fill1 = [x(x < 5) 5];
y_fill1 = [y(x < 5) 0];
x_fill2 = [5 x(x >= 5)];
y_fill2 = [0 y(x >= 5)];
% Fill the regions
fill(x_fill1, y_fill1, [0.8 0.8 0.8], 'FaceAlpha', 0.5);
fill(x_fill2, y_fill2, [0.5 0.5 0.5], 'FaceAlpha', 0.5);
hold off;
For a comprehensive understanding of the 'fill' function in MATLAB, please refer to the following documentation.
https://www.mathworks.com/help/matlab/ref/fill.html
I hope this helps!

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