this is my code and it has a problem while calculating kafa=y2/y12

kafa=y2/y12. but it gives error.. Matrix dimensions must agree.

[Walter Roberson]

You probably need y1./y12

[waqas muhammad]

sir there is no y1 in this code.it should be undefined if i do so

[Walter Roberson]

You probably need y2./y12

[waqas muhammad]

but it gives error.. dimensions must agree

Answer 1

[per isakson]

Error using  / 
Matrix dimensions must agree. 

>> whos y2 y12
  Name       Size             Bytes  Class     Attributes
  y12        1x450             3600  double              
  y2        15x1                120  double              
>>

• What kind of result do you expect from y2/y12 ?
• See Debug a MATLAB Program

[waqas muhammad]

how to deal with it sir?how to solve this problem now?

[per isakson]

• What is your intention?
• What is kafa supposed to become? I don't know!

[per isakson]

Moved OP's answer to here

y2 is the experimental value while y12 is the theoritical values and i just wanna divide y2 by y12....

[waqas muhammad]

sir i couldn't find your answer. can you please kindly send it?

[per isakson]

• Did you carefully read /, Solve systems of linear equations xA = B for x ?
• Division between a column vector and a row vector of different length ????

[per isakson]

Try

>> figure, plot( y2, 'd' )
>> figure, plot( y12, '.' )

[waqas muhammad]

Division between a column vector and a row vector of different length. we are not concerend with pt while calcualtiong because we already have the value of y12 and y2 but the column vector and row vector are different nd it gives error

[per isakson]

I don't understand the meaning of your comment.

[per isakson]

It would help if you make an implementation based on nested for-loops.

Answer 2

[waqas muhammad]

bsxfun(@rdivide,A,B(:))... this can solve my problem but the number of elements in row and column are different now. so what can i do for this problem?

Answer 3

[waqas muhammad]

sir, y2 is 15x1 while y12 is 450x1, kafa=y2/y12. i need the result of y2/y12. i mean, row to column division,not elementwise division. y2 has 15 rows while y12 has 450 columns. now i need to divide these 15 rows of y2 by 15 columns of y12.

[Walter Roberson]

Divide by which 15 columns of y12 ?