Why getting this error ? how to fix it ?

Hi all,

I am trying to achive coeffcient correlation but getting erorr "Unable to perform assignment because the indices on the left side are not compatible with the

size of the right side".

Following function being used:

for i=1: length(a_sw)-300     
x(i)= corrcoef(a_sw (i:i+300), b_sw(i:i+300));
Time_x=i;
end
figure(1)
plot(a_sw,b_sw,'ko',a_sw,b_lin,'r');
xlabel('A')
ylabel('B')

Any help would be appreciated.

Thanks

[Alex Mcaulley]

whos a_sw b_sw

[Alex Mcaulley]

The problem are in those variables. What is the output of this line?

whos a_sw b_sw

[Adam]

corrcoef returns a matrix. You are trying to assign it to x(i) which is a scalar.

[Alex Mcaulley]

Yes, unless a_sw and b_sw were scalars

[Jan]

@Bob: If you really appreciate the help of the forum, do not delete your question after solutions have been posted.

Answer 1

[Alex Mcaulley]

As Adam said, probably your a_sw and b_sw are arrays and then the output of this

corrcoef(a_sw (i:i+300), b_sw(i:i+300));

is a matrix.

Then, to store those matrix you can use, for example, a cell array:

for i=1: length(a_sw)-300     
    x{i}= corrcoef(a_sw (i:i+300), b_sw(i:i+300));
    Time_x=i;
end
figure(1)
plot(a_sw,b_sw,'ko',a_sw,b_lin,'r');
xlabel('A')
ylabel('B')