How to have a same size of the image with out distortion in a subplot along with the graph?

Hello all,

I am trying to place an image along with a plot in subplot. But when i am trying to plot the image is small compared to the size of the plot. I need both of them to be in the same size. I also used "imagesc(img);" , but the image looks distorted. Please help me with this. Thanks in advance.

My code:

set(0,'Units','pixels');
scrsz = get(0,'ScreenSize');
scr_width = scrsz(3);
scr_heigth = scrsz(4);
img = imread('Geometry.jpg');
Z = readtable('Fig1.xlsx');
alpha = 0.1;
figure('Position', round([alpha*scr_width alpha*scr_heigth  (1-2*alpha)*scr_width (1-2*alpha)*scr_heigth ]));
% 1. Image subplot
subplot(1,4,1);
% imagesc(img);
imshow(img);
axis off

data = table2array(Z) ;
subplot(1,4,2)
plot(data(:,1), data(:,2), 'k','linewidth', 2);
hold off
grid on
xlabel('xxx');
ylabel('yyy');

subplot(1,4,3)
plot(data(:,3), data(:,4), 'linewidth', 2);
hold on
str = '#0072BD';
color = sscanf(str(2:end),'%2x%2x%2x',[1 3])/255;
plot(data(:,5), data(:,6), '*', 'Color', color, 'linewidth', 2);
hold on
plot(data(:,7), data(:,8), 'linewidth', 2);
hold on
str = '#EDB120';
color = sscanf(str(2:end),'%2x%2x%2x',[1 3])/255;
plot(data(:,9), data(:,10), '*', 'Color', color, 'linewidth', 2);
hold on
plot(data(:,11), data(:,12), 'linewidth', 2);
hold on
str = '#77AC30';
color = sscanf(str(2:end),'%2x%2x%2x',[1 3])/255;
plot(data(:,13), data(:,14), '*', 'Color', color, 'linewidth', 2);
hold on
plot(data(:,15), data(:,16), 'linewidth', 2);
hold on
str = '#A2142F';
color = sscanf(str(2:end),'%2x%2x%2x',[1 3])/255;
plot(data(:,17), data(:,18), '*', 'Color', color, 'linewidth', 2);
hold off
% legend('Wygnanski&Fiedler (1969)', 'Standard k-\in', 'RNG k-\in', 'Realizable k-\in',...
%     'SST k-\omega', 'Location', 'northeast');
grid on
xlabel('xxx');
ylabel('yyy');

subplot(1,4,4)
plot(data(:,19), data(:,20), 'linewidth', 2);
hold on
str = '#0072BD';
color = sscanf(str(2:end),'%2x%2x%2x',[1 3])/255;
plot(data(:,21), data(:,22), '*', 'Color', color, 'linewidth', 2);
hold on
plot(data(:,23), data(:,24), 'linewidth', 2);
hold on
str = '#EDB120';
color = sscanf(str(2:end),'%2x%2x%2x',[1 3])/255;
plot(data(:,25), data(:,26), '*', 'Color', color, 'linewidth', 2);
hold on
plot(data(:,27), data(:,28), 'linewidth', 2);
hold on
str = '#77AC30';
color = sscanf(str(2:end),'%2x%2x%2x',[1 3])/255;
plot(data(:,29), data(:,30), '*', 'Color', color, 'linewidth', 2);
hold on
plot(data(:,31), data(:,32), 'linewidth', 2);
hold on
str = '#A2142F';
color = sscanf(str(2:end),'%2x%2x%2x',[1 3])/255;
plot(data(:,33), data(:,34), '*', 'Color', color, 'linewidth', 2);
hold off
% legend('Wygnanski&Fiedler (1969)', 'Standard k-\in', 'RNG k-\in', 'Realizable k-\in',...
%     'SST k-\omega', 'Location', 'northeast');
grid on
xlabel('xxx');
ylabel('yyy');

Warning: Column headers from the file were modified to make them valid MATLAB identifiers before creating variable names for the table. The original column headers are saved in the VariableDescriptions property.
Set 'VariableNamingRule' to 'preserve' to use the original column headers as table variable names.

Answer 1

[Mathieu NOE]

hello

there is a very detailled example here how to manage subplots dimensions (if you want to master it)

How do you match the width of figures in a tiledlayout when using axis equal? - MATLAB Answers - MATLAB Central

here I offer a quick and simple solution by making the figure "wider" so that both subplots appear more alike in size

here's my result so far :

I didn't notice any difference here between imagesc and imshow

set(0,'Units','pixels');
scrsz = get(0,'ScreenSize');
scr_width = scrsz(3);
scr_heigth = scrsz(4);

img = imread('Geometry.jpg');
Z = readtable('trail.xlsx');
alpha = 0.1;
figure('Position', round([alpha*scr_width alpha*scr_heigth  (1-2*alpha)*scr_width (1-2*alpha)*scr_heigth ]));
% 1. Image subplot
subplot(1,2,1);
% imagesc(img);
imshow(img);
axis off
data = table2array(Z) ;
subplot(1,2,2)
plot(data(:,1), data(:,2), 'k','linewidth', 2);
hold off
grid on
xlabel('xxx');
ylabel('yyy');

%% optionnal (try)
% pbaspect([1 1 1])   % Make the x-axis, y-axis equal lengths
% daspect([1 1 1]); % equal lengths in all directions

[Mathieu NOE]

with this line uncommented :

pbaspect([1 1 1])   % Make the x-axis, y-axis equal lengths

you get this result :

[Vishnuvardhan Naidu Tanga]

Hello @Mathieu NOE

Thank you for the quick response. Sorry i have made few changes to the code. It has 4 sub plots when i run it den the size od the image is small compared to other.

[Mathieu NOE]

hello again

so , as described in the other post (already mentionned above) , you can define your axes with different sizes

no need to call subplot anymore !

the "a" factor let you decide the magnification of the width for the 1st axe vs the remaining ones

here's the result on my side :

f = figure('Units','normalized','Position', [0.1 0.1 0.8 0.8]);

left = 0.05;
bottom = 0.1;
height = 0.8;
width = 1-2*left;
hs = 0.05; % horizontal separation 
N = 4; % nb of subplots = axes 

a= 2.5; % increase width of first axe by factor a 
w = (width - (N-1)*hs)/(a + (N-1));

% create first axe with specific dimensions
ax(1) = axes(f,'Position',[left bottom a*w height]);
left = left + a*w + hs;

% then the rest with same dims
for k = 2:N
    ax(k) = axes(f,'Position',[left bottom w  height]);
    left = left + w + hs;
end

img = imread('Geometry.jpg');
Z = readtable('Fig1.xlsx');
data = table2array(Z) ;

% 1. Image subplot
% subplot(1,4,1);
imshow(img, 'Parent', ax(1));
axis off

% subplot(1,4,2)
axes(ax(2)); % Activate the 2nd axes
plot(data(:,1), data(:,2), 'k','linewidth', 2);
hold off
grid on
xlabel('xxx');
ylabel('yyy');

% subplot(1,4,3)
axes(ax(3)); % Activate the 3rd axes
plot(data(:,3), data(:,4), 'linewidth', 2);
hold on
str = '#0072BD';
color = sscanf(str(2:end),'%2x%2x%2x',[1 3])/255;
plot(data(:,5), data(:,6), '*', 'Color', color, 'linewidth', 2);
hold on
plot(data(:,7), data(:,8), 'linewidth', 2);
hold on
str = '#EDB120';
color = sscanf(str(2:end),'%2x%2x%2x',[1 3])/255;
plot(data(:,9), data(:,10), '*', 'Color', color, 'linewidth', 2);
hold on
plot(data(:,11), data(:,12), 'linewidth', 2);
hold on
str = '#77AC30';
color = sscanf(str(2:end),'%2x%2x%2x',[1 3])/255;
plot(data(:,13), data(:,14), '*', 'Color', color, 'linewidth', 2);
hold on
plot(data(:,15), data(:,16), 'linewidth', 2);
hold on
str = '#A2142F';
color = sscanf(str(2:end),'%2x%2x%2x',[1 3])/255;
plot(data(:,17), data(:,18), '*', 'Color', color, 'linewidth', 2);
hold off
% legend('Wygnanski&Fiedler (1969)', 'Standard k-\in', 'RNG k-\in', 'Realizable k-\in',...
%     'SST k-\omega', 'Location', 'northeast');
grid on
xlabel('xxx');
ylabel('yyy');

% subplot(1,4,4)
axes(ax(4)); % Activate the 4th axes
plot(data(:,19), data(:,20), 'linewidth', 2);
hold on
str = '#0072BD';
color = sscanf(str(2:end),'%2x%2x%2x',[1 3])/255;
plot(data(:,21), data(:,22), '*', 'Color', color, 'linewidth', 2);
hold on
plot(data(:,23), data(:,24), 'linewidth', 2);
hold on
str = '#EDB120';
color = sscanf(str(2:end),'%2x%2x%2x',[1 3])/255;
plot(data(:,25), data(:,26), '*', 'Color', color, 'linewidth', 2);
hold on
plot(data(:,27), data(:,28), 'linewidth', 2);
hold on
str = '#77AC30';
color = sscanf(str(2:end),'%2x%2x%2x',[1 3])/255;
plot(data(:,29), data(:,30), '*', 'Color', color, 'linewidth', 2);
hold on
plot(data(:,31), data(:,32), 'linewidth', 2);
hold on
str = '#A2142F';
color = sscanf(str(2:end),'%2x%2x%2x',[1 3])/255;
plot(data(:,33), data(:,34), '*', 'Color', color, 'linewidth', 2);
hold off
% legend('Wygnanski&Fiedler (1969)', 'Standard k-\in', 'RNG k-\in', 'Realizable k-\in',...
%     'SST k-\omega', 'Location', 'northeast');
grid on
xlabel('xxx');
ylabel('yyy');

[Vishnuvardhan Naidu Tanga]

Hello @Mathieu NOE,

Thank you for the response. As you can see the size of the image and the plots are not same. How can I have both width and height of all the plots and image same?

[Mathieu NOE]

hello again

tried to find a good balance ... you can opt for the automatic tuning or the manual settings (factor "a" that allows a different width to the image plot axis) - see what works for you

I believe with a = 1.5 I have the best rendering :

img = imread('Geometry.jpg');
[m,n] = size(img);
h2w_ratio = n/m;

Z = readtable('Fig1.xlsx');
data = table2array(Z) ;

%%

f = figure('Units','normalized','Position', [0.1 0.1 0.8 0.8]);

height = 0.6;
hs = 0.05; % horizontal separation 
left = hs;
width = 1-2*left;
bottom = 0.5 - height/2;

N = 4; % nb of subplots = axes 

%% increase width of first axe by factor a 
%  if we want to equal height to width ratios between image and plot axes , this 
%  means for the 1st axe : height/(a*w) = h2w_ratio
% combined with : w = (width - (N-1)*hs)/(a + (N-1));
% we obtain the optimal a value as : 
a = height/h2w_ratio*(N-1)/(width - (N-1)*hs - height/h2w_ratio); % automatic tuning 
a = 1.5; % manual tuning

w = (width - (N-1)*hs)/(a + (N-1));

% create first axe with specific dimensions
ax(1) = axes(f,'Position',[left bottom a*w height]);
left = left + a*w + hs;

% then the rest with same dims
for k = 2:N
    ax(k) = axes(f,'Position',[left bottom w  height]);
    left = left + w + hs;
end


% 1. Image subplot
% subplot(1,4,1);
imshow(img, 'Parent', ax(1));
axis off

% subplot(1,4,2)
axes(ax(2)); % Activate the 2nd axes
plot(data(:,1), data(:,2), 'k','linewidth', 2);
hold off
grid on
xlabel('xxx');
ylabel('yyy');

% subplot(1,4,3)
axes(ax(3)); % Activate the 3rd axes
plot(data(:,3), data(:,4), 'linewidth', 2);
hold on
str = '#0072BD';
color = sscanf(str(2:end),'%2x%2x%2x',[1 3])/255;
plot(data(:,5), data(:,6), '*', 'Color', color, 'linewidth', 2);
hold on
plot(data(:,7), data(:,8), 'linewidth', 2);
hold on
str = '#EDB120';
color = sscanf(str(2:end),'%2x%2x%2x',[1 3])/255;
plot(data(:,9), data(:,10), '*', 'Color', color, 'linewidth', 2);
hold on
plot(data(:,11), data(:,12), 'linewidth', 2);
hold on
str = '#77AC30';
color = sscanf(str(2:end),'%2x%2x%2x',[1 3])/255;
plot(data(:,13), data(:,14), '*', 'Color', color, 'linewidth', 2);
hold on
plot(data(:,15), data(:,16), 'linewidth', 2);
hold on
str = '#A2142F';
color = sscanf(str(2:end),'%2x%2x%2x',[1 3])/255;
plot(data(:,17), data(:,18), '*', 'Color', color, 'linewidth', 2);
hold off
% legend('Wygnanski&Fiedler (1969)', 'Standard k-\in', 'RNG k-\in', 'Realizable k-\in',...
%     'SST k-\omega', 'Location', 'northeast');
grid on
xlabel('xxx');
ylabel('yyy');

% subplot(1,4,4)
axes(ax(4)); % Activate the 4th axes
plot(data(:,19), data(:,20), 'linewidth', 2);
hold on
str = '#0072BD';
color = sscanf(str(2:end),'%2x%2x%2x',[1 3])/255;
plot(data(:,21), data(:,22), '*', 'Color', color, 'linewidth', 2);
hold on
plot(data(:,23), data(:,24), 'linewidth', 2);
hold on
str = '#EDB120';
color = sscanf(str(2:end),'%2x%2x%2x',[1 3])/255;
plot(data(:,25), data(:,26), '*', 'Color', color, 'linewidth', 2);
hold on
plot(data(:,27), data(:,28), 'linewidth', 2);
hold on
str = '#77AC30';
color = sscanf(str(2:end),'%2x%2x%2x',[1 3])/255;
plot(data(:,29), data(:,30), '*', 'Color', color, 'linewidth', 2);
hold on
plot(data(:,31), data(:,32), 'linewidth', 2);
hold on
str = '#A2142F';
color = sscanf(str(2:end),'%2x%2x%2x',[1 3])/255;
plot(data(:,33), data(:,34), '*', 'Color', color, 'linewidth', 2);
hold off
% legend('Wygnanski&Fiedler (1969)', 'Standard k-\in', 'RNG k-\in', 'Realizable k-\in',...
%     'SST k-\omega', 'Location', 'northeast');
grid on
xlabel('xxx');
ylabel('yyy');