direction of Y Axis is changing

when I plot an image in point form the direction of Y Axis is changing!

how can I make 0-Y and 0_X in the same position

there is three dimention because I worke on volume image

label=I;
[X,Y,Z]=meshgrid(1:size(label,1),1:size(label,2),1:size(label,3));
label=label>0; % für logischen Eintrag
Data=label; % Für Farbeintrag
ind=Data(:)>0; % keine Null - einträge
px=X(ind);
py=Y(ind); 
pz=Z(ind);
color=double(Data(ind));
%% point plot
set(gca,'YDir','normal')
plot3(px,py,pz,'.')
xlabel('X µm')
ylabel('Y µm')
zlabel('Z µm')

Answer 1

[Jonas]

calling

set(gca,'XDir','normal');

should be enough

[Walter Roberson]

YDir

[Mohannad Ajamieh]

Sorry it does not work.

As you can see in the code, I already included it .......set(gca,'YDir','normal')..... and I also tried the 'reverse' but it does not work too.

Answer 2

[Walter Roberson]

[X,Y,Z]=meshgrid(1:size(label,1),1:size(label,2),1:size(label,3));

That is incorrect. size(label,1) is the number of rows, and rows correspond to Y not to X. size(label,2) is the number of columns, and columns correspond to X not to Y.

[Mohannad Ajamieh]

yes it looks like the code is incorrect.

please tell me how to fix it, because I am stuck in this problem since two days.

[Walter Roberson]

[X,Y,Z] = meshgrid(1:size(label,2),1:size(label,1),1:size(label,3));

[Mohannad Ajamieh]

it still the same.

values of y are decreasing instead of increasing.

[Walter Roberson]

What is your current code?

[Mohannad Ajamieh]

clear all
close all
names=dir('......source folder.........');
for iii=1:size(names,1) 
       
I(:,:,iii)=imread(strcat('........source folder..........',names(iii).name));
  
for j=1:size(names,1)
Img_3D=surface('XData',[0 75;0 75],'YData',[0 0;75 75],'ZData',[0.2985*j 0.2985*j;0.2985*j 0.2985*j], 'CData' ,flipdim(im2double(I(:,:,iii)),1),'FaceColor','texturemap','EdgeColor','none');
colormap(gray) 
xlabel('10*x mm')
ylabel('10*y mm')
zlabel('10*z mm')
end
end



label=I;
[X,Y,Z] = meshgrid(1:size(label,2),1:size(label,1),1:size(label,3));
label=label>0; % für logischen Eintrag
Data=label; % Für Farbeintrag
ind=Data(:)>0; % keine Null - einträge
px=X(ind);
py=Y(ind);
pz=Z(ind);
color=double(Data(ind));
%% punkt plot
plot3(px,py,pz,'.')
title('punkt darstellung')
xlabel('X mm')
ylabel('Y mm')
zlabel('Z mm')