CODEWITHSUNDEEP
matlabplotfigure
user3612121
user3612121

Reputation: 102

splitting the y axis into a linear and logarithmic scale matlab

I would like to split the y axis into a linear and logarithmic scale section while plotting the figure. For example, from 1-30 a linear scale and from 30 - 100 a logarithmic scale. Is there any way of doing that? Thank you

Upvotes: 1

Views: 1051

Answers (1)

Nemesis
Nemesis

Reputation: 2334

I don't know if there is a direct method for this. However, you can join both regions (linear and log) manually. See attached code:

clc; clear;

x = 1:100; % Values to plot

xorg = 0:10:100; % Ticks on the Y-axis
xticks = xorg; % Final tick location

x1 = log10(30);  % start of logarithmic scale
x2 = log10(100); % end of logarithmic scale

dx = (x2-x1)*60; % 60 here is an arbitrary scaling factor

scale = @(x)(log10(x)-x1)/(x2-x1)*dx+30; % Scaling from lin to log

x(x>30) = scale(x(x>30)); % Apply scaling to plotting values
xticks(xticks>30) = scale(xticks(xticks>30)); % Apply scaling to Y ticks

plot(x);
ylim([0 max(xticks)]);
set(gca,'YTick',xticks,'YTickLabel',xorg); % Update the ticks

This produces a plot as below. Linear and logarithmic scale in one plot

Upvotes: 3

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