Error: 'fspecial' & bwdist for CHM Exercice 2 about digital-forestry-toolbox HOT 8 CLOSED

Did you install and load the required octave packages ("image", "statistics")?

If not, type the following in the octave Command Window:
pkg install image -forge
pkg install statistics -forge

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Hello and thank you for your answer.Thank you very much after the installation I launched the pkg load image command and it worked.
Thank

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I'm just going to ask a question how can I export the segmentation to get the grip of the canopic surface in shp format

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Otherwise, at levels of exercise 3, I also have this error
>> ind = sub2ind([nrows, ncols], P(:,1), P(:,2)); error: 'nrows' undefined near line 1 column 16
have you un idea

Thanks

from digital-forestry-toolbox.

Hello, For info compared to tutorial 3, I had to try to hazar the numbers. And I put the proposed numbers to make it work.

`>> ind = sub2ind([1, 2], P(:,1), P(:,2));
error: sub2ind: index (2001,_): out of bound 1

ind = sub2ind([10, 20], P(:,1), P(:,2));
error: sub2ind: index (2001,): out of bound 10
ind = sub2ind([2001, 20], P(:,1), P(:,2));
error: sub2ind: index (,2801): out of bound 20
ind = sub2ind([2001, 2801], P(:,1), P(:,2));
xyh = [pc.record.x, pc.record.y, pc.record.z - models.terrain.values(ind)];
`

However, it is impossible to export the data in csv format
`>> fid = fopen('C:\LIDAR\NM\tiges.csv', 'w+'); % open file

fprintf(fid, 'X, Y, H\n'); % write header line
fprintf(fid, '%.2f, %.2f, %.2f\n', xyh_stem'); % write r
ecords
fclose(fid); % close file
xyh_stem
xyh_stem =
fid
fid = 6
`
But my question is how to find nrows and ncols directly.

Thank you

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Now to find nrows and ncols i use
[nrows, ncols] = size(models.terrain.values);
But impossible to export data to CSV file

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Please make sure:

• you are running the tutorial_3.m file (and not copy pasting code from the webpage)
• you have installed and loaded all the required Octave packages

I've also modified tutorial 2 to allow export of segment (individual tree) boundaries. Let me know how it works.

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Closing this due to inactivity.

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