Convert cell names to variable names to extract data from another dataset in matlab

Question

% Initial Inputs
 S.P1=[0.1,0.2,0.3]; % Varies in length
 S.P2=[3.5,5.5];
 S.P3=[7,8,9,10];

C is 50x3 matrix of integer indices to assign values of P1, P2, P3.

for i=1:numel(fieldnames(S))
      x{i}=['S.P',num2str(i)];
end
x={'S.P1','S.P2','S.P3'};  %Output of for loop

How to use cell name as variable names to extract the values of P1, P2, P3.

[S.P1(C(:,1)),S.P2(C(:,2)),S.P3(C(:,3))] % Desired Output

How to use variable names generated in for loop to extract data as shown above.

replace the assignment inside the loop so that it will generate only the field name, without the `S.`, then you can call it dynamically. For the full solution, use inside the loop this line instead what you have: `data = [data ,S.(['P',num2str(i)])(C(:,i))];`, while you define `data = [];` before the loop — Adiel, Dec 22 '19 at 13:02

score 0 · Answer 1 · answered Dec 22 '19 at 13:34

0

Shortcut way

data=[data,S.(['P',num2str(i)])(C(:,i))]

answered Dec 22 '19 at 13:34

user9003011

1 Answers1