Non-existent data point added to plot when using YScale set to log
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Torbjørn Smith
on 14 Feb 2022
Edited: Torbjørn Smith
on 17 Feb 2022
I am having trouble with my box charts.
I want to use a logarithmic scale on the y-axis, but when I set the YScale to 'log' the figure gains a non-existent data point in the lower right corner.
Below I have added pictures of the same plot using first:
set(gca,'YScale','linear');
And then:
set(gca,'YScale','log');
Notice the small x in the bottom, right corner of the second plot where the log scale is used.
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/894070/image.jpeg)
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/894075/image.jpeg)
Any help to get rid of this seemingly misprinted data point is much appreciated. The complete code used for plotting is appended below.
%% Run time
close all;
clear;
clc;
%% Data
run_times = [1.4634 1.5331 1.4921 1.3144 1.0671;
1.3962 1.3904 1.4602 1.2182 1.1692;
1.4932 1.4054 1.2830 1.2400 1.1326;
1.5038 1.3657 1.1776 1.0256 1.1283;
1.7159 1.4243 1.2277 1.0248 1.1027;
1.4595 1.3683 1.3592 1.0343 1.1770;
1.3933 1.3528 1.4153 1.0389 1.1779;
1.4677 1.3328 1.1518 1.0293 1.0091;
1.5231 1.4361 1.1591 1.1834 0.9311;
1.5266 1.3547 1.1698 1.3268 0.9344;
1.4179 1.3956 1.3281 1.3119 1.0316;
1.7265 1.3067 1.2173 1.2612 1.0231;
1.7641 1.3872 1.2086 1.0228 0.9045;
1.6448 1.3595 1.1600 1.0287 0.9136;
1.4732 1.3832 1.1769 1.0213 0.8964;
1.5144 1.3128 1.4429 1.0217 0.9178;
1.6277 1.3571 1.2957 1.0618 0.9330;
1.5958 1.6076 1.1443 1.0634 0.9082;
1.5744 1.6343 1.1444 1.0780 0.9363;
1.7770 1.6009 1.4395 1.2499 0.9666];
run_time_size = size(run_times);
%Group data with even spaces without regard for actual space between groups
x_axis_groups = repmat(1:run_time_size(2),run_time_size(1),1);
label_x_axis = repmat([50 60 70 80 90],run_time_size(1),1);
%% Plot
%For formatting
font_size = 14;
y_padding = 0.1;
%Create figure
figure;
hold('on');
%Create box chart
box_chart_time = boxchart(x_axis_groups(:),run_times(:));
%Box chart properties
box_chart_time.BoxFaceColor = 'b';
box_chart_time.BoxFaceAlpha = 0;
box_chart_time.MarkerStyle = 'x';
box_chart_time.MarkerColor = 'k';
grid('on');
box('on');
set(gca,'FontSize',font_size);
set(gca,'ycolor','k');
%Labels
xlabel('Outlier Fraction [\%]','Interpreter','latex');
ylabel('Runtime [s]','Interpreter','latex');
%X-axis
set(gca,'XTick',x_axis_groups(1,:));
set(gca,'XTickLabel',label_x_axis(1,:));
set(gca,'XLimitMethod','padded');
%Y-axis
% set(gca,'YScale','linear'); %Linear y-axis
set(gca,'YScale','log'); %Logarithmic y-axis
rounded_min_log_value_time = floor(log10(min(run_times(:))));
rounded_max_log_value_time = ceil(log10(max(run_times(:))));
y_lim_min_time = 10^(rounded_min_log_value_time - y_padding);
y_lim_max_time = 10^(rounded_max_log_value_time + y_padding);
ylim([y_lim_min_time y_lim_max_time]);
0 Comments
Accepted Answer
Sourav Karmakar
on 17 Feb 2022
Edited: Sourav Karmakar
on 17 Feb 2022
Hey Torbjorn ,
This is a bug known to the development team and they will try to fix it in future releases. One workaround would be to use boxplot function.
Hope this helps!
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