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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.

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Rishabh Rathore
Rishabh Rathore 2018-5-31
编辑：Rishabh Rathore 2018-5-31

1 个投票

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

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Ranjan Sonalkar
Ranjan Sonalkar 2018-5-31
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
Rishabh Rathore 2018-5-31
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
Ranjan Sonalkar 2018-5-31
that works. Thanks for the help.

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