calling a function with struct inputs

Hi,

How can I call such a function:

function varargout = hey(init,varargin)
if init ==1
    if nargin >1
        geom_gs = varargin{1};
        m = geom_gs.box.m;
        n = geom_gs.box.n;
        Lx = geom_gs.box.Lx;
        Ly = geom_gs.box.Ly;
    end
end
end

[Stephen23]

"How can I call such a function"

Because it neither displays anything nor returns any output it is not a very interesting function to call.

But lets call it anyay:

S.box.m = 1;
S.box.n = 2;
S.box.Lx = 3;
S.box.Ly = 4;
hey(1,S)


function varargout = hey(init,varargin)
if init ==1
    if nargin >1
        geom_gs = varargin{1};
        m = geom_gs.box.m;
        n = geom_gs.box.n;
        Lx = geom_gs.box.Lx;
        Ly = geom_gs.box.Ly;
    end
end
end

Note that VARARGIN can be replaced by a simple variable name.

Note that VARARGOUT is unused and can be removed.

Answer 1

[Pooja Kumari]

Hi,

To call the hey function, you would use the following syntax in MATLAB:

initValue = 1;
geom_gs.box.m = 10;
geom_gs.box.n = 20;
geom_gs.box.Lx = 100;
geom_gs.box.Ly = 200;

hey(initValue, geom_gs)

You have not returned anything from the "hey" function, so you can change the function and return the values to the "varargout"

You can refer below for the updated code:

function varargout = hey(init,varargin)
    if init == 1
        if nargin > 1
            geom_gs = varargin{1};
            m = geom_gs.box.m;
            n = geom_gs.box.n;
            Lx = geom_gs.box.Lx;
            Ly = geom_gs.box.Ly;
            
            % Assign to varargout
            varargout{1} = m;
            varargout{2} = n;
            varargout{3} = Lx;
            varargout{4} = Ly;
        end
    end
end

To call the hey function, you would use the following syntax in MATLAB:

[m,n,Lx,Ly] = hey(initValue, geom_gs)