How to plot log-scale with number ?

How can I plot log scale with the numbers like below image ?

Answer 1

[Tommy]

Maybe something like this?

% data:
X = 2*logspace(1, 3, 100);
Y = rand(100,1);

% labels to keep:
labels = [20 30 50 70 100 200 300 500 1000 2000];

% prepare axes, plot:
ax = axes('XScale', 'log', 'NextPlot', 'add');
plot(ax, X, Y, '.')
ax.XLim = [20 2000];
ax.XAxis.TickDirection = 'out';

% steal the tick locations from the minor ticks, then turn the minor ticks off:
drawnow
ax.XTick = ax.XAxis.MinorTickValues;
ax.XMinorTick = 'off';

% remove labels we don't want to keep:
ax.XTickLabel(~ismember(ax.XTick, labels)) = {''};

[Jeevan Kumar Bodaballa]

This is working but I'd wonder if we have any optmised code !

Answer 2

[the cyclist]

One way is to use the semilogx function.

[Jeevan Kumar Bodaballa]

But how can we plot the numbers like above image

[the cyclist]

There are multiple ways to do this task. Here is one way:

% data:
X = 2*logspace(1, 3, 100);
Y = rand(100,1);

% Locations of the ticks (and also how we want them labeled)
tickLoc = [20 30 50 70 100 200 300 500 1000 2000];

% Create a new figure window, and plot the data with log x-axis
figure
semilogx(X,Y);

% Set the axis limit, tick locations and labels
set(gca, ...
    'XLim',[20 2000], ...
    'XTick', tickLoc, ...
    'XTickLabel',tickLoc);

Tommy's solution and mine are doing effectively the same thing (although I did not do all the little things he did like make the tick marks point outward). The biggest difference is that I used the semilogx command, where he created the axes first, and then set the 'XScale' property to 'log'.

[Jeevan Kumar Bodaballa]

Appreciated for your help and explanation. :)

Thank you