how to use indexing in subs command? Here is the program i am trying..i want to have mu for each iteration which is a function of a,b,c which depend on iteration...I have listed the errors cropped up.

clc
clear all
for i=1:4
syms a b c
i;
g=a+b-c;
 a(i)=1+i; 
 b(i)=2+i;
 c(i)=3+i;
mu(i)=subs(g,{a,b,c},{a(i),b(i),c(i)});
end

??? Error using ==> sym.subs>flatten at 291
Number of elements in NEW must match number in OLD

Error in ==> sym.subs>mupadsubs at 149
[X,Y] = flatten(X,Y);

Error in ==> sym.subs at 124
G = mupadsubs(F,X,Y);

Answer 1

[Zhang lu]

clc 
clear all
syms a b c 
g=a+b+c;
i=1:4;
A=1+i;
B=2+i;
C=3+i;
mu=subs(g,{a,b,c},{A,B,C})