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Set the color of the axes per default to black (instead of dark gray)?

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I am using
%#!/bin/rm
clc
clear
set(groot,'DefaultFigureGraphicsSmoothing','off') %not blurry function (circles)
set(groot, 'DefaultAxesFontSmoothing', 'off'); %not blurry axes-text-labels
close all;
fig=figure;
scatter((1:20),rand(1,20),'k'); %# example from https://de.mathworks.com/help/matlab/ref/figure.html
print('-dpng','grayAxes.png');
set(gca,'XColor','k','YColor','k');
print('-dpng','blackAxes.png');
close all force; %# https://de.mathworks.com/support/bugreports/1812836
Can I set
set(gca,'XColor','k','YColor','k');
as a default for all figures ( a: for all figures in a document on every computer ; b: for all figures created on my computer)?
  2 Comments
Johannes Kalliauer
Johannes Kalliauer on 5 Jun 2019
The default color is [0.15 0.15 0.15] (which looks like black, but isn't), but I want [0 0 0].
In the Atachement you find a gray zero(left) and a black zero(right).
If you don't believe it open it in a program like gimp and pick up the color.

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Accepted Answer

Adam Danz
Adam Danz on 5 Jun 2019
Edited: Adam Danz on 5 Jun 2019
Try putting this in your startup.m file
set(groot,{'DefaultAxesXColor','DefaultAxesYColor','DefaultAxesZColor'},{'k','k','k'})
Test:
axh = axes;
axh.XAxis.Color
ans =
0 0 0
  3 Comments
Adam Danz
Adam Danz on 5 Jun 2019
Edited: Adam Danz on 5 Jun 2019
Ha! I also try to reload prior to answering and have noticed delays. Server sync delay?
Johannes Kalliauer
Johannes Kalliauer on 28 Oct 2019
In my case (Linux) it was in my home-directory under ~/Documents/MATLAB , on Windows it is in `%userprofile%/Documents/MATLAB`.

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More Answers (1)

Jan
Jan on 5 Jun 2019
Edited: Jan on 5 Jun 2019
I'd try it with:
set(groot, 'DefaultAxesXColor', [0,0,0], ...
'DefaultAxesYColor', [0,0,0], ...
'DefaultAxesZColor', [0,0,0])
  3 Comments
Jan
Jan on 5 Jun 2019
Edited: Jan on 5 Jun 2019
Some years ago MathWorks decided to use a medium gray on light gray for the code in this forum, while the text was medium gray on white. This looked kewl and stylish, almost like the pages of Apple. Of course this reduced the readability and this is a really bad idea for a forum for discussions about a programming language. A similar decision is to let 5/8th of the scree width blank. This might look more fancy, but reducing the information density is a bad idea and massive scrolling is one of the most tedious jobs I do, when I write in this forum.
I assume, that some designers thought, that gray looks smarter. Setting the default colors back to black in matlabrc.m or startup.m was the first thing I did.
Johannes Kalliauer
Johannes Kalliauer on 5 Jun 2019
Sorry for this offtopic, but @Jan: I assume with Greasemonkey (Firefox) or Tampermonkey (Chrome) you can fix this locally on your browser.

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