Why this message error?
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n=size(prices,2);
M_coint=zeros(n,n);
for i=1:n;
j=1:n;
M_coint(i,j)=cadf(prices(:,i),prices(:,j),0,1);
M_coint(i,j)=M_coint.adf;
end
message error: The following error occurred converting from struct to double: Error using double Conversion to double from struct is not possible.
采纳的回答
cadf does not seem to be an inbuilt MATLAB function, and you give no information about how it is defined or the output that it returns. And you also don't give us the complete error message (which tell us the line), so we have to also guess where this error is occurring in your code.
I like guessing games, so lets try.
First you define
M_coint=zeros(n,n);
which means M_coint is a matrix of class double. Then if we assume that cadf returns a structure, then the line
M_coint(i,j)=cadf(...)
will try to allocate that structure to M_coint.
Ouch! Allocating a structure to a double is an error! It does not work.
4 个评论
fede
2015-9-22
Perhaps you meant to do something like this:
tmp = cadf(prices(:,i),prices(:,j),0,1);
M_coint(i,j) = tmp.adf;
Or alternatively you could save the complete output in a non-scalar structure, which means that you will have all of the data that cadf returns:
N = size(prices,2);
for n = N:-1:1;
S_coint(n) = cadf(prices(:,n),prices,0,1);
end
This also makes accessing the data easy, try:
[S_coint.adf]
{S_coint.method}
horzcat(S_coint.crit)
fede
2015-9-22
Stephen23
2015-9-23
This is a different topic to your original question. Please search for solutions to this new topic in the documentation, on the internet, or in this forum.
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