Using meshgrid from cell array error - "Undefined function full for input arguments of type cell"

I am getting an error when trying to use the meshgrid function after creating an array from a structure using a for loop.

if true

%function (A,B) = 'Plot Output'

% This function takes input from the numbers of observation points for the % TABOO input and corresponds the observation point with the calculations % on the output files 'rate.his' and 'disp.his'

B = load ('obspoints.txt'); num_obs = length(B);

%num_obs = 11;

                fid = fopen('rate.his') ;
                    if fid == -1
                        disp ('File open not working')
                    else
                        disp('File open worked!')

                S = textscan(fid,'%s','delimiter','\n') ; %scans text
                S = S{1} ;
                %get locations where # not present
                qwe= strfind(S, '#');  %locates string '#'
                qwe = find((cellfun('isempty',qwe)));  
                %create new array sans '#'
                qwer = cell2mat(cellfun(@str2num,S(qwe),'un',0)) ; 
                qwerl = length(qwer);

                closeresult = fclose(fid);

                    if closeresult == 0
                        disp('File Close worked')
                    else
                        disp('File Close failure')

                    end
                    end
    for  n= 1:num_obs - 1 

        zxa = n + (n-1)*10;     %functions which give the  column interval on the above
        %matrice which correspond to each time stamp on the observation point
        zxb = n + (n-1)*10 + 10;

        rate(n).long     = B(n,2);
        rate(n).lat      = B(n,1);
        rate(n).time     = qwer(zxa:zxb,1);
        rate(n).dvert    = qwer(zxa:zxb,2);
        rate(n).dnorth   = -1*qwer(zxa:zxb,3);
        rate(n).deast    = qwer(zxa:zxb,4);
        rate(n).dgeoid   = qwer(zxa:zxb,5);
        rate(n).mass     = qwer(zxa:zxb,6);
    end

cell = struct2cell(rate);

% After the structure has been created, different outputs can be easibly % accessed, but must be turned back into a cell from the structure, and % a foor loop is used to fill up the arrays so the meshgrid function can be % used

    for  n= 1:num_obs - 1 
        long(n) = cell(1,:,n);  
        lat(n)  = cell(2,:,n);
        dvert(n)= cell(4,:,n);
    end
        [X,Y] = meshgrid(long,lat);

    % code
  end

the error message is:

Undefined function 'full' for input arguments of type 'cell'.

Error in meshgrid (line 56) xrow = full(x(:)).'; % Make sure x is a full row vector.

[Jan]

Using "cell" as a name of a variable shadows the builtin function with the same name. This does not cause the problems here, but it is a frequent source of bugs.

Answer 1

[Jan]

All we see is the failing code:

[X,Y] = meshgrid(long,lat);

You provide a cell array as inputs and this must fail. But what is the intention? I guess:

long = [cell(1, :, :)];  % Attention: not the builtin cell function
lat  = [cell(2, :, :)];
[X,Y] = meshgrid(long,lat);

This is a guess only. Are you sure that the conversion from structs to cells to vectors is useful? What about storing the data in a struct instead of a struct array:

% rate(n).long     = B(n,2);  ==>
rate.long(n)     = B(n,2);

Then you can omit the conversions and run directly:

[X,Y] = meshgrid(rate.long, rate.lat);

[Franklyn Dunbar]

Thanks for that, changed to

if true
  % code
end
       for  n= 1:num_obs - 1 

        zxa = n + (n-1)*10;     %functions which give the  column interval on the above
        %matrice which correspond to each time stamp on the observation point
        zxb = n + (n-1)*10 + 10;

        rate(1).long(n)     = B(n,2);
        rate(1).lat(n)      = B(n,1);
        rate(n).time     = qwer(zxa:zxb,1);
        rate(n).dvert    = qwer(zxa:zxb,2);
        rate(n).dnorth   = -1*qwer(zxa:zxb,3);
        rate(n).deast    = qwer(zxa:zxb,4);
        rate(n).dgeoid   = qwer(zxa:zxb,5);
        rate(n).mass     = qwer(zxa:zxb,6);
    end

        [X,Y] = meshgrid(rate(1).long,rate(1).lat);