Brace indexing is not supported for variables of this type.

Question

Pooneh Shah Malekpoor 2021-5-15

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/830673-brace-indexing-is-not-supported-for-variables-of-this-type

编辑： Scott MacKenzie 2021-5-15

采纳的回答： Scott MacKenzie

在 MATLAB Online 中打开

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

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Walter Roberson 2021-5-15

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

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Answer 1

Scott MacKenzie 2021-5-15

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/830673-brace-indexing-is-not-supported-for-variables-of-this-type#answer_700278

编辑：Scott MacKenzie 2021-5-15

在 MATLAB Online 中打开

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));