Brace indexing is not supported for variables of this type.

Hello

I have got this error message:

Error in cell2mat (line 36)

if isnumeric(c{1}) || ischar(c{1}) || islogical(c{1}) || isstruct(c{1})

Error in slope_centres (line 248)

C=cell2mat(Csurf{surface,g});

In each loop try, I want to get a specific array of the cell matrix Csurf (its indexing depend on the surface number and g) as numeric value, and use it as the input for the function Slide. The code is attached below. Any recommendation is highly appreciated.

Bests

 for g=1:Nmc  %number of monte carlo iterations
        for i=1:nx+1
            for j=1:ny+1
       
        d(1)=sqrt((xc(i)-P(2,1))^2+(yc(j)-P(2,2))^2); % distance 
        d(2)=sqrt((xc(i)-P(3,1))^2+(yc(j)-P(3,2))^2); % distance 
        d(3)=yc(j)-P(2,2)+ H; % distance 
        R1=min(d);
        R2=max(d);
        
        DeltaR=(R2-R1)/nr;
        
     
        
        cont=0;
        
        for R=R1:DeltaR:R2
            cont=cont+1;
            surface=surface+1
             C=cell2mat(Csurf{surface,g});%------>line36
             
             [Fb]=slide(rho,C,P,xc(i),yc(j),R,n,KH,KV,MD);
                       FF(cont,1)=R;
            FF(cont,2)=Fb;

        end
         
       
   
        FFb(i,j)=nanmin(FF(:,2)); 
        
        for Cont=1:cont
            
            if FFb(i,j)==FF(Cont,2)
                RR(i,j)=FF(Cont,1);
            end
        end
             end
         end

FFFb=nanmin(nanmin(FFb)) 
 end

[Walter Roberson]

you do not show Csurc so it is difficult to say. Perhaps it is empty.

Answer 1

[Scott MacKenzie]

It's hard to tell because you haven't stated what Csurf contains. Yes, it's a cell matrix, but a cell matrix containing what?

Having said that, it appears the problem is likely that you are converting twice, using brace indexing and using cell2mat. I suggest you undo one of the conversions by changing ...

 C=cell2mat(Csurf{surface,g});  

to

C=Csurf{surface,g}; 

or

C=cell2mat(Csurf(surface,g));

[Pooneh Shah Malekpoor]

Yes!the second one. Thanks.