Error using - Matrix dimensions must agree. Error in mmmmmmmtest1m (line 326) a2=aa-a1;

Error using  - 
Matrix dimensions must agree.

Error in mmmmmmmtest1m1m (line 326)

a2=aa-a1;

i am surprised why my a2 not calculating my aa value is ok and a1 but the aa and a1 matrices are not equal when i minus them it gave above error ,i spend 10 days on it but this issue is not solving

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 Code Hints:-

u(hour)=hour; 

Clothesdrye(hour)=power_pattern(hour,1);

a1=find(Clothesdrye);

------------------------------------------------

stereo=[1 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 0 0 0 0 1 1 1];

Fan=[0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 0 1 0 0 0 1 1];

aa=find(stereo);

bb=find(Fan);

-------------------------------------------

Index

a2=aa-a1;

b2=bb-b1;

% len = min([numel(aa) numel(a1)]);-----1
% a1 = aa(1:len) - a1(1:len);-----2
%a1=linspace(0,14,14);%# 14 values spanning the range 0 to 14------3
%a1=[1     8     9    10    11    12    13    14    15    16    17    22    23    24];----4

i have also tried from 1 to 4 but in vain

i am pasting the bit pattern of variables may be helpful for commenters/guiders below.

Error using  - 

Matrix dimensions must agree.

Error in WDO_SG_Code_PL_test1m (line 326)

a2=aa-a1;

>> u

u =

       1     2     3     4     5     6     7     8     9    10    11    12    13    14    15    16    17    18    19    20    21    22    23    24

>> power_pattern

power_pattern =

       0     0     0     0     0     0     0     1     1     1     1     0
       0     0     0     0     0     0     0     0     0     0     0     0
       0     0     0     0     0     0     0     0     0     0     0     0
       0     0     0     0     0     0     0     0     0     0     0     0
       0     0     0     0     0     0     0     0     0     0     0     0
       0     0     0     0     0     0     0     0     0     0     0     0
       0     0     0     0     0     0     0     0     0     0     0     0
       0     0     0     0     0     0     0     0     0     0     0     0
       0     0     0     0     0     0     0     0     0     0     0     0
       0     0     0     0     0     0     0     0     0     0     0     0
       0     0     0     0     0     0     0     0     0     0     0     0
       0     0     0     0     0     0     0     0     0     0     0     0
       0     0     0     0     0     0     0     0     0     0     0     0
       0     0     0     0     0     0     0     0     0     0     0     0
       0     0     0     0     0     0     0     0     0     0     0     0
       0     0     0     0     0     0     0     0     0     0     0     0
       0     0     0     0     0     0     0     0     0     0     0     0
       0     0     0     0     0     0     0     0     0     0     0     0
       0     0     0     0     0     0     0     0     0     0     0     0
       0     0     0     0     0     0     0     0     0     0     0     0
       0     0     0     0     0     0     0     0     0     0     0     0
       0     0     0     0     0     0     0     0     0     0     0     0
       0     0     0     0     0     0     0     0     0     0     0     0
       0     0     0     0     0     0     0     1     1     1     1     0

>> Clothesdrye

Clothesdrye =

       0     1     1     1     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0

>> a1

a1 =

       2     3     4

>> aa

aa =

       1     8     9    10    11    12    13    14    15    16    17    22    23    24

>> a1

a1 =

       2     3     4

>> a2
Undefined function or variable 'a2'.

>> Dish_washe

Dish_washe =

       0     1     1     1     1     1     1     1     0     1     0     0     0     0     0     0     0     0     0     0     0     0     0     0

>> b2
Undefined function or variable 'b2'.

>> bb

bb =

       9    10    11    12    13    14    15    16    17    19    23    24

>> b1

b1 =

       2     3     4     5     6     7     8    10

Answer 1

[Walter Roberson]

Your aa has is a 14 element row vector. Your a1 is a 3 element row vector. What result are you expecting when you subtract them?

Hint: bsxfun()