Is there a function in matlab that adds some points in my matrix ?

Hello

I have a point cloud from an STL file in the form of a dot matrix of a table designed on CATIA .

I want to add some point in the matrix so that if I display my point by plot3 in Matlab I see my table in a set of point cloud.

Is there a function in matlab that adds some points in my matrix.

[Jan]

I don't get it. Adding points in a matrix is trivial and done by the cat() command, or equivalently the concatenation operator [].

Do you really have the inputs in an STL file, or have you been able to import the file already? In the latter case, you have a matrix and the source of the data does not matter here.

[chedli zaafouri]

Yes, the source of the data does not matter here. So I have a matrix but I want to randomly add some points in my matrix to add noise in my cloud of points.

As an example, it is indicated in the following image: my matrix consists of the blue data (inlier data) and I want to add points that indicate the noises (outliers) in my matrix.

[Guillaume]

So, your question is not about asking some unspecified points to a matrix, but how to add some specific points akin to noise that fit a distribution (the red points). It's not something I can answer but whoever could help you would need to know more details about the distribution of the noise you want to add.

[chedli zaafouri]

My matrix A is a matrix of size: N ** 3 which contains the coordinates of the points and I wish to add noises for example as indicated in the following image: the data in green are the point of my matrix A which are surrounded by the red data (noise). So, I want to add noises that envellope every point of my matrix A