Problem with subplot size and annotation of each plot

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BN 2020-4-4

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https://ww2.mathworks.cn/matlabcentral/answers/515358-problem-with-subplot-size-and-annotation-of-each-plot

评论： Fego Etese 2020-4-6

Hey all,

I read the documentation very carefully and make this subplot, however, you can see it is very messed up. I have annotation (textbox) on each plot but after subplot, all of them show on each other.

Here is my subplot: ( You can see just 1 annotation showing and size of plots are very bad

I wish I can correct it so it is something like this figure below. Please tell me what option I have to make it right.

Thank you

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Answer 1

Image Analyst 2020-4-4

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https://ww2.mathworks.cn/matlabcentral/answers/515358-problem-with-subplot-size-and-annotation-of-each-plot#answer_423984

在 MATLAB Online 中打开

Use xlabel() and ylabel() with a small enough font size instead of annotation() or text():

fontSize = 8;
xlabel('Observed Preciptation [mm]', 'FontSize', fontSize);
ylabel('Whatever you want', 'FontSize', fontSize);

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BN 2020-4-4

编辑：BN 2020-4-4

在 MATLAB Online 中打开

Dear Image Analyst,

Thank you, But I'm already done that.

Here is my first subplot, I have done the exact same thing for all others.

subplot(7,3,1)
figure(1);
hold on;
class1 = scatter(X,Y,12,'k','filled');
plot(1:max(X),'k'); %45 degree line
[pp,s] = polyfit(X,Y,1);
r_squared = 1 - s.normr^2 / norm(Y-mean(Y))^2;
R2 = r_squared;
plot(1:max(X),pp(1)*(1:max(X))+pp(2)); %trend line
str = {sprintf('y = %.2fx+%.2f',pp(1),pp(2)),sprintf('R^2 = %.2f',r_squared)};
annotation('textbox', [0.2, 0.75, .1, .1], 'String',str ,'FitBoxToText',...
    'on','fontname','Cambria Math','HorizontalAlignment', 'center',...
    'FontSize',8,'BackgroundColor', 'white');
xlabel('Observed precipitation (mm)','FontSize',8)
ylabel('Modeled Precipitation','FontSize',8)
set(gca,'fontname','Times New Roman','FontSize',8)  % Set it to times
box on;
grid on

Please looking at the second picture that I posted, All subplots have a box that includes an equation and R2. when I plot separately my plots I have this annotation box too but when I use subplot I have just one box.

Thanks again

BN 2020-4-5

在 MATLAB Online 中打开

y.mat
x.mat

Dear Image Analyst

Here are my x and y.

and here is the code:

figure(1);
hold on;
scatter(x,y,12,'k','filled');
[pp,s] = polyfit(x,y,1);
r_squared = 1 - s.normr^2 / norm(x-mean(y))^2;
str = {sprintf('y = %.2fx+%.2f',pp(1),pp(2)),sprintf('R^2 = %.2f',r_squared)};
annotation('textbox', [0.2, 0.75, .1, .1], 'String',str ,'FitBoxToText',...
    'on','fontname','Cambria Math','HorizontalAlignment', 'center',...
    'FontSize',8,'BackgroundColor', 'white');
xlabel('Observed precipitation (mm)','FontSize',8)
ylabel('Modeled precipitation (mm)','FontSize',8)
set(gca,'fontname','Times New Roman','FontSize',8)  % Set it to times
box on;
grid on
hTrend = refline(pp(1), pp(2)); % Trend line
hrefline = refline([1 0]); % 45 degree refline
hrefline.Color = 'k';
axis normal

I want to make a 7x3x1 subplot (repeat this x and y plot i neach plot) in the acceptable space and view like this picture that I download from google:

In order to simplify I attach just one x and y but I have 21 x and y that really similar to each other. and 21 te4xt boxes for each plot. in fact I repeated this code 21 times in order to achieve subplot.

Image Analyst 2020-4-5

在 MATLAB Online 中打开

Try this:

clc;    % Clear the command window.
close all;  % Close all figures (except those of imtool.)
clear;  % Erase all existing variables. Or clearvars if you want.
workspace;  % Make sure the workspace panel is showing.
format short g;
format compact;
fontSize = 8;
fprintf('Beginning to run %s.m ...\n', mfilename);
s = load('x.mat')
x = s.x;
s = load('y.mat')
y = s.y;
hFig = figure;
hFig.WindowState = 'maximized'
for k = 1 : 21
	hPlot = subplot(7, 3, k);
	hold on;
	scatter(x,y,12,'k','filled');
	
	[pp,s] = polyfit(x,y,1);
	r_squared = 1 - s.normr^2 / norm(x-mean(y))^2;
	str = {sprintf('y = %.2fx+%.2f',pp(1),pp(2)),sprintf('R^2 = %.2f',r_squared)};
	thisPlotsPosition = hPlot.Position; 
	
	% Get the position of this plot as [x, y, width, height].
	% Tweak as needed to get the position where you want it.
	annotation('textbox', thisPlotsPosition, 'String',str ,'FitBoxToText',...
		'on','fontname','Cambria Math','HorizontalAlignment', 'center',...
		'FontSize',8,'BackgroundColor', 'white');
	
	xlabel('Observed (mm)', 'FontSize', fontSize)
	ylabel('Modeled (mm)', 'FontSize', fontSize)
	title('Modeled vs. Observed Precipitation', 'FontSize', fontSize)
	set(gca,'fontname','Times New Roman','FontSize',8)  % Set it to times
	box on;
	grid on
	hTrend = refline(pp(1), pp(2)); % Trend line
	hrefline = refline([1 0]); % 45 degree refline
	hrefline.Color = 'k';
	axis normal
end
fprintf('Done running %s.m ...\n', mfilename);