Modify and Replace particular columns in an array

Hello there, i am a beginner of matlab and

i am having problem that i get array "output" with 14x120 ... (dimension is correct) but this time i want to modify and replace particular columns like

Columns 1 through 6

   -0.0728   -0.0621   -0.0918   -0.1055   -0.0864   -0.1205   
   -0.0699   -0.0234   -0.0995   -0.0503   -0.0090   -0.0826   
    0.0974    0.0744    0.1191    0.1036    0.0790    0.1247    
   -0.2722   -0.1985   -0.3369   -0.2245   -0.1605   -0.2993   
   -0.1489   -0.0950   -0.2100   -0.1813   -0.1191   -0.2390   
   -0.3367   -0.2839   -0.3959   -0.3471   -0.2900   -0.4072   
   -0.2041   -0.1758   -0.2553   -0.2776   -0.2299   -0.3204   
   -0.3105   -0.2385   -0.3688   -0.2540   -0.1944   -0.3225   
   -0.3176   -0.2660   -0.3690   -0.3122   -0.2608   -0.3664   
   -0.2951   -0.2536   -0.3478   -0.3377   -0.2848   -0.3863   
    0.0523    0.0984    0.0184    0.0996    0.1335    0.0595    
   -0.2245   -0.1611   -0.2775   -0.1682   -0.1157   -0.2338   
   -0.3455   -0.3061   -0.4095   -0.4114   -0.3561   -0.4656   
    0.1004    0.1127    0.0803    0.0160    0.0502    0.0062

col- 1 should be as it is and col-3 and col-4 should be log(col-1) and exp(col-1) respectively

similarly col-4 and its corresponding transformation into col-5 and col-6 and so on

Hope My question is clear and please help me with this !! Thank You........

Answer 1

[Walter Roberson]

 T = output(:,1:3:end);
 new_output = reshape([T; log(T); exp(T)], size(T,1), []);

I think...

[pooja]

Thank you so much mr walter

it worked as charm :)