MATLAB: Error using .^ Matrix dimensions must agree.

simulink

>> rotor_angle.data
ans =
         0
 -198.3198
 -305.6161
 -272.6427
 -114.5335
   96.1435
  262.6932
  308.6737
  212.9811
   19.5358
 -182.8759
 -301.3524
 -281.5161
 -132.4714
   77.3741
  251.7070
  310.5130
  226.8018
   38.9946
 -166.7102
 -295.8993
 -289.2786
 -149.8866
   58.2994
  239.7275
  311.1270
  239.7275
   58.2994
 -149.8866
 -289.2786
 -295.8993
 -166.7102
   38.9946
  226.8018
  310.5130
  251.7070
   77.3741
 -132.4714
 -281.5161
 -301.3524
 -182.8759
   19.5358
  212.9811
  308.6737
  262.6932
   96.1435
 -114.5335
 -272.6427
 -305.6161
 -198.3198
    0.0000
>> k=1:51;
>> L=sum(log(abs(rotor_angle.data(k).^(-123*k))))
Error using .^
Matrix dimensions must agree.
Each element of the array %rotor_angle% must be raised to a power and added. In each case, the degree is the ordinal number of the array element
My matlab version R2016a.

Best Answer

This is because rotor_angle is 51x1 and k is 1x51. Transpose one of them.
L=sum(log(abs(rotor_angle.data(k).^(-123*k'))))
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