MATLAB: For Loop Iteration With Part of Vector

Question

I want to use a row vector to index in a for loop. But, I want to switch to a different function when the index reaches a certain element in the vector. My row vector (t) is 1×1271810. I would like to use my first function in a for loop up to element 945665 in the vector, and then use a different function for the rest of the for loop (or another for loop) from element 945666 to 1271810. Is this possible? Here is how I have my for loop written so far, how would I modify it?:

[a,b] = size(t);
for i = 1:a
  for j = 1:b 
    PredCurrFun(i,j) = p(4).*((1-calcPinf(p,t(i,j),Co(i),Diff)).* ...
        exp(-calcLambda(p,t(i,j),Co(i),Diff) .* t(i,j)) + calcPinf(p,t(i,j),Co(i),Diff)); 
  end
end
"second function I would like to use is a 1 - exponential"

Answer 1

I would suggest using one for loop the length of 't' and a conditional statement to switch between the functions. As an example

for i=1:width(t)
    if i<945665
        % function 1
    else
        % function 2 
    end 
end