x-axis error when adjusting axis label

Hello all,

i am having trouble with x-axis adjustment.

Below is the original code before implementing any change to the x-axis.

As it is to be seen on the first picture, the x-axis labeling is clustered and the numbers are not horizontally placed.

figure
boxplot(TT3.P,round(TT3.OT),'PlotStyle','compact')
title('Power consumption depending on the outside temperature')
xlabel('Outside temperature [°C]')
ylabel('Heating power [kW]')
grid on

In order to correct the issues mentioned above i have added 'set' to adjust the x-axis.

figure
boxplot(TT3.P,round(TT3.OT),'PlotStyle','compact')
title('Power consumption depending on the outside temperature')
xlabel('Outside temperature [°C]')
xlim([-15 35])
ylabel('Heating power [kW]')
set(gca, 'XLim',[-15 35], 'XTick', -15:5:35 , 'XTickLabel', -15:5:35);
grid on

However the plotted figure does not represent what i intended to show.

It simply shifted to the right and is not showing the negative side of values on the x-axis (as it is to be seen in the picture below).

What may be the problem and how may i proceed?

Thank you.

[Callum Heath]

https://uk.mathworks.com/help/matlab/ref/xticklabels.html

Try either:

set(gca, 'XLim',[-15 35], 'XTick', -15:5:35 , 'XTickLabel', 'auto');

Or, XTickLabel requires a 1xn cell array with string inputs! So something like this:

xticklabels=cell(1,length(-15:5:35));

indx = 1;

for i =-15:5:35

xticklabels{indx} = num2str(i);

indx=indx+1;

end

figure

boxplot(TT3.P,round(TT3.OT),'PlotStyle','compact')

title('Power consumption depending on the outside temperature')

xlabel('Outside temperature [°C]')

xlim([-15 35])

ylabel('Heating power [kW]')

set(gca, 'XLim',[-15 35], 'XTick', -15:5:35 , 'XTickLabel', xticklabels);

grid on

[Sehoon Chang]

thank you for the alternative option.

Answer 1

[Adam Danz]

What appears to be x-ticks in the compact boxplot are really text labels that are a member of an hggroup along with the boxplot components.

Here are two ways to rotate the text and remove some of the "ticks".

Method 1: Remove some existing labels

This demo isolates the text labels, rotates them, and removes 2/3 of them.

boxplot(randi(50,39),(1:39)-9,'plotstyle','compact');
ax = gca(); 
% Get handle to the hggroup
boxplotGroupHandle = findobj(ax,'Type','hggroup','Tag','boxplot'); 
% Get handle to the text labels that serve as x-ticks
textHandles = findobj(boxplotGroupHandle, 'type', 'text');
% The handles are in reverse order so we'll flip the vector to make indexing easier
textHandles = flipud(textHandles); 

% Rotate and recenter text 
set(textHandles, 'rotation', 0,'HorizontalAlignment','center','VerticalAlignment','bottom')

% Keep 1 "tick label" out of every 3
% Instead of deleting handles, replace their string with an empty ''
rmIndx = ~ismember(1:numel(textHandles), 1:3:numel(textHandles));
set(textHandles(rmIndx), 'String', '')

Method 2: Replace the labels with actual x-ticks

This demo isolates the text labels, removes them, and adds in actual x-tick labels.

boxplot(randi(50,39),(1:39)-9,'plotstyle','compact');
ax = gca(); 
% Get handle to the hggroup
boxplotGroupHandle = findobj(ax,'Type','hggroup','Tag','boxplot'); 
% Get handle to the text labels that serve as x-ticks
textHandles = findobj(boxplotGroupHandle, 'type', 'text');
% Store their string values; note that the original order is reversed so 
% we'll flip it now to correct that. 
textStr = get(flipud(textHandles), 'String');
% Delete the text 
delete(textHandles)

% Add xticks: add 1 tick for every 3
ax.XTickLabelMode = 'auto';
ax.XTick = 1:3:numel(textStr); 
ax.XTickLabel = textStr(1:3:end);

[Sehoon Chang]

thanks! without your advise, i wouldnt have been able to solve the problem.