How to change markers on axes to be on the opposite side and how to add more markers in between that are smaller

So here's my graph

I would like to flip the axis markers for each point to the opposite side and add more markers in between each point but that are smaller. How do I do this?

Answer 1

[Chunru]

plot(rand(20,3))
h=gca;
h.XMinorTick = 'on';
h.TickDir = 'out';

[Christopher Arreola]

What's gca?

[Chunru]

"doc gca" for more info. It means get current axes handle.

Answer 2

[Star Strider]

Try something like this —

x = logspace(-4, 5, 500);
y = 1-exp(-0.2*x) + sin(2*pi*x*1E-4)*0.1;

figure
semilogx(x, y)
Ax = gca;                                                                   % gca = 'Get Current Axes' Handle
xt = log10(xticks);
N = 5;                                                                      % X-Tick Frequency Multiplication Factor
xtn = linspace(min(xt), max(xt), numel(xt)*N);
lxtn = 10.^(xtn);
Ax.XTick = lxtn;
Ax.XTickLabel = round(log10(lxtn),1);
Ax.XDir = 'reverse';

EDIT — Added a short explanation of gca as a % comment. No other changes in the code.

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