3d Bar plot on map

I have a floor plan in a .jpeg or .png file, that I can read and display with the function image with the x-y coordinates. I also have another quantity, z, for a few, N, selected x-y locations of the floor coordinates. I would like to draw 3D bars at the appropriate N locations corresponding to the values of z. Would appreciate any help to do this.

Answer 1

[Rishabh Rathore]

You can plot image as a surface (on x-y plane) using the following code

%Insert Image
Z=imread('img.jpg');
[X,map]=rgb2ind(Z,256);
x=1:25; %change x,y to suite your requirements
y=1:25;
[xx,yy]=meshgrid(x,y);
zz=zeros(size(xx));
colormap(map)
surf(xx,yy,zz,X,'FaceColor','texturemap','EdgeColor','none','CDataMapping','direct');

After that use the function provided in the link below to plot the bar graph.

SCATTERBAR3

[Ranjan Sonalkar]

Not clear what format z_data is to go in the code. My image file consists of 5421x7335x3 uint8 pixels, and I have a 16-dimensional vector to plot as the bars, which I presume would be formatted into z_data. The bar locations are specified by 16-dimensional x and y co-ordinates.

Thanks

[Rishabh Rathore]

As for plotting of image is concerned, the size would be adjusted to fit your x,y grid, you probably won't have to worry about it. And for bar graph I have changed my answer a bit, please check that out.

[Ranjan Sonalkar]

that works. Thanks for the help.