MATLAB: How to efficiently Assign Value to column vector

Question

Dear Coder, Any idea how to remove the two for loop to assign multiple value to a column vector? Really appreciate for the help.

The patients.mat is build-in mat file in MATLAB 2017

load patients
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
[tf,Ioc_Alert_LessThree] = find (ismember(Smoker, 1)); 
for i = 1: length (tf)
    M (i,1) = Height (tf(i));
end
[tgf,Ioc_Alert_two] = find (ismember(Smoker, 0)); 
for i = 1: length (Ioc_Alert_two)
  M (i,2) = Height (tgf(i));
end
M(M == 0) = NaN;
NonSmoker(Ioc_Alert_two == 1) = 0;
Yes_Smoker(Ioc_Alert_LessThree == 1) = 1;
scatter ( M (1:34,1),Yes_Smoker)
hold on
scatter ( M (:,2),NonSmoker)

Answer 1

balandong - your first for loop is

 for i = 1: length (tf)
    M (i,1) = Height (tf(i));
 end

Try replacing this with

M = zeros(length(tf),1);
M(1:length(tf)) = Height(tf(1:length(tf)))

Something similar can be done for the second for loop too.