Error using glmfit: Second column in Y?
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Hi everyone,
I'm currently trying to use glmfit like this:
B2 = glmfit(x(c,:),y,'binomial');
With y being a n x 1 matrix with 1's and 2's for group one and two. However, it keeps giving me the following error:
For the binomial distribution, Y must be a binary vector or a matrix with two columns with the number of trials in the second column.
My question is: Should I ad a second column with 1:number of observations? Example below:
y = [1,1; 1,2; 1,3; 1,4; 2,5; 2,6; 2,7; 2,8];
Best regards,
Eric
采纳的回答
Walter Roberson
2017-7-27
编辑：Walter Roberson
2017-7-27
B2 = glmfit(x(c,:), y==2, 'binomial');
That is, your use of 1 and 2 is confusing it, so you need to convert those to 0 and 1.
更多回答（1 个）
Saurabh Gupta
2017-7-21
0 个投票
As the error suggests, Y should
1) either be a binary vector i.e. a vector of 0s and 1s only (other values, like 2, are not allowed),
2) or a 2-column matrix where second column is "the number of trials" as demonstrated by the example at the following link.
Hope this helps!
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