conversion from double to cell is not possible

Hi,

I have just started to learn matlab. I get the folowing error when the below mentioned function is executed.

Error using cell

Conversion to double from cell is not possible.

Error in sparse2matrix (line 2)

num_array(y)=cell(a(1,1),a(1,2));

when this statement is executed separately no such errors occur.

plzz help me .

Thank you in advance.

function x=sparse2matrix(a,b,c,d)
y=cell(a(1,1),a(1,2));
y(:)={b};
y{c(1,1),c(1,2)}={c(1,3)};
y{d(1,1),d(1,2)}={d(1,3)};
x=cell2mat(y);
end

[Bhaskar R]

Can you provide input values, a, b, c,d?

[Venkatesh K]

a,b,c and d are row vectors

eg:

sparse2matrix({[2 3], 0, [1 2 3], [2 2 -3]});

Answer 1

[Bhaskar R]

I don't know what you are trying to do with given code, if I assume by name of the mentioned function name "sparse to matrix conversion", to do this sparse to matrix conversion MATLAB has a command

full

Issues in your code

you have passed variables to function as

sparse2matrix({[2 3], 0, [1 2 3], [2 2 -3]});    % actually it is only one input

This means you are paasing only single variable as cell type to the function, i.e. single varible consist 4 values in it

so if you want to pass variables as defined in function call the function as

sparse2matrix([2 3], 0, [1 2 3], [2 2 -3]);     % remove {}, which makes cell array

And one more issue with code is values assigned as cell type so modify as

function x=sparse2matrix(a,b,c,d)
y=cell(a(1,1),a(1,2));
y(:)={b};
y(c(1,1),c(1,2))={c(1,3)};    % {} replaced with ()
y(d(1,1),d(1,2))={d(1,3)};    % {} replaced with ()
x=cell2mat(y);
end
% Note : it's assumption only to get error output