How to check a function input to be ptcloud object?

Asked by Philipp Schnabel on 4 Jun 2019

Latest activity Commented on by Philipp Schnabel on 4 Jun 2019

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Hello,

I want to right some functions, which will have the matlab ptCloud objects as inputs. I want to validate the inputs at the beginn of the function, I know I can use inputParser to do that, but it looks like it doesn't like the object as an input at all.

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Answer by Titus Edelhofer on 4 Jun 2019

Accepted Answer

Hi Philipp,

probably you are looking for the function "isa":

function myfun(x)
if ~isa(x, 'ptCloud')
    error('Input argument x must be ptCloud object')
end

Titus

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Philipp Schnabel on 4 Jun 2019

Thank you Titus,

it did help really, now I have one more question, how can i check that the PointCloud Object is not empty? Can I access the data inside and check it in the InputParser? My code example does look like this:

function [tform, cov, error, time] = test(move,fix,iter,varargin)
inp = inputParser;
inp.addRequired('move', @(x) isa(x, 'pointCloud'));
inp.addRequired('fix', @(x) isa(x, 'pointCloud'));
inp.addOptional('iter', 10, @(x)x > 0 && x < 10^5);
inp.parse(move,fix,iter,varargin{:});
tform = affine3d();
cov = zeros(6);
error = 0;
time = 0;

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