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How do I make a plot background black?

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Bob
Bob 2014-12-15
编辑： Voss 2023-12-20
I have two vectors.
x=[1 2 3 4 5];
y=[10 20 30 40 50];
I plotted the vectors
plot(x,y)
The default background of the plot is white. How do I change the plot background to black?

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采纳的回答

Star Strider
Star Strider 2014-12-15
This works:
plot(x,y)
set(gca,'Color','k')
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Voss
Voss 2023-12-20
编辑：Voss 2023-12-20
Ran in:
@Markus: Do you mean a solution where the axes is invisible? If so, then something like this will work:
x=[1 2 3 4 5];
y=[10 20 30 40 50];
h = plot(x,y);
xl = xlim();
yl = ylim();
p = patch(xl([1 2 2 1 1]),yl([1 1 2 2 1]),'k');
set(gca(),'Children',[h;p],'Visible','off')
On the other hand, if you want the axes to be visible, then you just have to set its color as in the Accepted Answer.
Star Strider
Star Strider 2023-12-20
Ran in:
The original approach still works.
x = (0:9).';
y = [sin(2*pi*x/9) cos(2*pi*x/9)];
figure
plot(x, y, 'LineWidth',2.5)
Ax = gca;
Ax.Color = 'k';
.

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更多回答（2 个）

Azzi Abdelmalek
Azzi Abdelmalek 2014-12-15
编辑：Azzi Abdelmalek 2014-12-15
x=[1 2 3 4 5];
y=[10 20 30 40 50];
plot(x,y)
set(gca,'color',[0 0 0])
  2 个评论
Andyzhuang
Andyzhuang 2018-8-30
how to set quiver background color black? Hi, I use quiver function to figure vector. I want to set the background black and vector in green. Please how to set the background color? I have tried to use set(gca,'color','k'), but it doesn't work. Any comments and advise are very appreciated.
Walter Roberson
Walter Roberson 2018-8-31
Using set(gca, 'color', 'k') worked fine in a test I just did.

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Image Analyst
Image Analyst 2023-12-20
Ran in:
See this demo to show you how you can change just about everything by referring to it properly.
% Demo to make a black graph with red Y axis, green X axis, and yellow grid. Markers are magenta with green lines between them.
% Initialization steps:
clc; % Clear the command window.
close all; % Close all figures (except those of imtool.)
clearvars;
workspace; % Make sure the workspace panel is showing.
format long g;
format compact;
fontSize = 24;
% Create sample data.
X = 1 : 20;
Y = rand(1, 20);
% Plot green lines between the markers.
plot(X, Y, 'g-', 'LineWidth', 3);
hold on;
% Plot magenta markers.
plot(X, Y, 'ms', 'LineWidth', 3, 'MarkerSize', 15);
grid on;
title('Y vs. X, Font Size 20', 'FontSize', 20, 'Color', 'b', 'FontWeight', 'bold');
% Make labels for the two axes.
xlabel('X Axis, Font Size 18');
ylabel('Y axis, Font Size 24');
yticks(0 : 0.2 : 1);
% Get handle to current axes.
ax = gca
ax =
Axes (Y vs. X, Font Size 20) with properties: XLim: [0 20] YLim: [0 0.9] XScale: 'linear' YScale: 'linear' GridLineStyle: '-' Position: [0.13 0.11 0.775 0.796812954621955] Units: 'normalized' Use GET to show all properties
% Now let's have fun changing all kinds of things!
% This sets background color to black.
ax.Color = 'k';
ax.YColor = 'r';
% Make the x axis dark green.
darkGreen = [0, 0.6, 0];
ax.XColor = darkGreen;
% Make the grid color yellow.
ax.GridColor = 'y';
ax.GridAlpha = 0.9; % Set's transparency of the grid.
% Set x and y font sizes.
ax.XAxis.FontSize = 18;
ax.YAxis.FontSize = 24;
% Make the axes tick marks and bounding box be really thick.
ax.LineWidth = 3;
% Let's have the tick marks go outside the graph instead of poking inwards
ax.TickDir = 'out';
% The below would set everything: title, x axis, y axis, and tick mark label font sizes.
% ax.FontSize = 34;
% Bold all labels.
ax.FontWeight = 'bold';
hold off
% Now do stuff with the figure, as opposed to the axes control that is ON the figure.
% Maximize the figure
g = gcf; % Get handle to the current figure.
g.WindowState = 'maximized'; % Make it full screen.
g.Name = 'Demo by Image Analyst'; % Put a custom string into the titlebar.
g.NumberTitle = 'off'; % Don't have it put "Figure 1" before the name.
g.MenuBar = 'figure'; % or 'none'
g.ToolBar = 'figure'; % or 'none'

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