Why I get this error? how can I solve it?

Error in returnindex (line 2) n=length(X);

Output argument "ind" (and maybe others) not assigned during call to "returnindex".

Error in BinData (line 28) Y(i,1)=returnindex(X(i),Value)-1;

Answer 1

[Fangjun Jiang]

Need your returnindex.m to see the problem. Most likely, it has a output argument called "ind" but was not assigned.

[hanif hamden]

function ind=returnindex(c,X)
n=length(X);
for i = 1 : n
    Y = X(i,1);
    if Y > c
        ind = i;

          break;
      end
  end

this is my returnindex.m

[hanif hamden]

clear; clc

%Input Value=dlmread('std_tx.asc'); mValue=max(Value(:,1)); n=length(Value);

%Bin Data for every two(2)km C=0; for j=2 : 2 : mValue C=C+1; X(C)=j; end

 C1=0;
 for P=1: 2 : mValue
     C1=C1+1;
     X1(C1)=P;
 end

X=X'; X1=X1';

n1=length(X); Y=ones(n1,1); for i=1 : n1 Y(i,1)=returnindex(X(i),Value)-1; end

n2=length(X1); Y1=ones(n2,1); for i=1 : n2 Y1(i,1)=returnindex2(X1(i),Value); end

 for i=1 : n1
     %fprintf('%.f : %.f\n',Y1(i,1),Y(i,1));
 end

std=ones(n1,1); stdValue=Value(:,2); for i=1 : n1 std(i,1)=mean(stdValue(Y1(i,1):Y(i,1))); end

% %OUTPUT

fid1=fopen('std_txR.asc','w'); %std_txR.asc fprintf(fid1,'Mean-Dist(km) Mean-Std(m)\n');

for i=1 : n1 fprintf(fid1,'%d %.5f\n',X(i),std(i,1)); end fclose(fid1);

this is overall script actually.

[Fangjun Jiang]

in returnindex.m, based on the condition, "ind" could never be evaluated.

[hanif hamden]

Yes. it is due to arrangement of the data. I found the solution. Thanks btw