MATLAB: Is there a way to “handle” the ANOVA boxplot

anovabox plotboxplotfigureMATLAB

Hi all, I am doing several ANOVAs in a row and I would like to save each boxplot (I mean automatically, I know how to do it manually). Unfortunately I cannot create a figure handler (such as h=plot(…)) nor rename the box plot using "figure" (commented below). The only ugly workaround I have found so far is by using findobj(allchild(0), 'flat', 'Type', 'figure') after each ANOVA…

Anyone has a better idea ?

%figure('Name','LeftStepScores','NumberTitle','off')
[lSp,lStbl,lSstats] = anova1(leftA);
xticklabels(leftXlabels);
title('Left step scores')

Cheers !

Best Answer

Why don't you just use figure(). anova1() produce 2 figures, you can get their handles using

hTable = figure(1);
hBoxPlot = figure(2);

Similarly for other iteration use

hTable = figure(3);
hBoxPlot = figure(4);

You can also check if you have chosen the correct figure by checking the tag property of figure handle.

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MATLAB: How to change text size in boxplot

I can think of two ugly hacks that work ...

The first is to set the default font size of all text labels for the plot

h = figure;
set(h, 'DefaultTextFontSize', 30);
load carsmall
boxplot(MPG, Origin);

The second is to change the text label after plotting

load carsmall
h = boxplot(MPG, Origin);
set(findobj(get(h(1), 'parent'), 'type', 'text'), 'fontsize', 30);

It is not clear to me what boxplot is actually returning. It is an array of handles, when I would have expect the group. My guess is if you look through the code of boxplot you can find a cleaner way.

EDIT

If you only have the figure file

hFig = figure;
load carsmall
boxplot(MPG, Origin);
saveas(hFig, 'temp_figure');
close(hFig);

You can open the figure and get the handle to the figure

hFig = open('temp_figure.fig');

The goal is then to find the boxplot object. Unfortunately, the boxplot object this is just an hggroup object and there might be lots of hggroup objects which are not boxplot objects. I don't know how to figure out if an hggroup object is actually a boxplot object. You can however, click around and select objects until gco works:

set(findobj(get(gco, 'Children'), 'type', 'text'), 'fontsize', 30);

MATLAB: Figure not appearing with gcf – is visible

Ok, the handle appears to be hidden.

This thread got me on the right path

http://uk.mathworks.com/matlabcentral/newsreader/view_thread/313495

I found the handle by using the following:

findall(0,'Type','Figure','Name','N-way ANOVA','HandleVisibility','callback')

and was able to change the HandleVisibility to 'on' so additional plots using this function would not be picked up by the findall command

Best Answer

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MATLAB: How to change text size in boxplot

MATLAB: Figure not appearing with gcf – is visible

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