How can I just change the color of the bottom x-axis of a figure?

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Zhou Ci
Zhou Ci 2023-11-18
评论： Dyuman Joshi 2023-11-23
I am trying to make a figure where I just want to change the color of the bottom x-axis. My line from the code is:
ax2.XAxis.Color = p.color
Using this gives color to both lower and upper x-axis. How can I keep upper axis black and only bottom x-axis changes? Thank you
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回答（2 个）

Star Strider
Star Strider 2023-11-18
Ran in:
If you just want to change the axis colour, try something like this —
Ax1 = axes;
Ax2 = axes;
Ax2.XAxisLocation = 'top';
Ax1.XColor = 'r';
This works in R2023b.
It would help to have your code and the MATLAB version you are using. See the documentation section on XColor for details.
.
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Star Strider
Star Strider 2023-11-22
It can be made to appear with either:
Ax2.YAxisLocation = 'right';
or:
Ax1.Box = 'on';
or turning it on in ‘Ax2’, depending on what is desired (since it is present in the first image, absent in the second).

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Image Analyst
Image Analyst 2023-11-22
Ran in:
Here is a demo to show you how you can change nearly everything in a plot.
% 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 1] XScale: 'linear' YScale: 'linear' GridLineStyle: '-' Position: [0.13 0.11 0.775 0.796812933025404] 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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