How to join datasets?

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Xinyuan Wei
Xinyuan Wei 2016-6-18
评论： Muhammad Usman Saleem 2016-6-19
I need to join some columns in the dataset attached below. When I joined the columns int_rate and id with the following code, it works.
TrainInputs = [TrainDataset.int_rate,TrainDataset.id]
But when I was trying to join the columns int_rate and sub_grade, it failed.
TrainInputs = [TrainDataset.int_rate,TrainDataset.sub_grade]
Error using horzcat
Dimensions of matrices being concatenated are not consistent.
Could you help me find out why and how should I do this? Thank you for your time.

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回答（1 个）

Muhammad Usman Saleem
check this in both columns vectors, these are not of same length.
TrainDataset.int_rate and TrainDataset.id are not of same length to concatenated. Always concatenate vector of same lengths
  2 个评论
Xinyuan Wei
Xinyuan Wei 2016-6-19
Thank you for your reply. But I still cannot understand.These three columns should all have 50 rows.
>> size(TrainDataset.id)
ans =
50 1
>> size(TrainDataset.int_rate)
ans =
50 1
>> size(TrainDataset.sub_grade)
ans =
50 1
Why matlab says they are not of the same length?
Muhammad Usman Saleem
Muhammad Usman Saleem 2016-6-19
You can't horizontally concatenate scalars with matrices or column vector, hence the error.
Find out which variable is the culprit on why it's not scalar (or why you're using a non-scalar variable in your expression.
As i do not know how you three column vectors looks, The attached .m file also not opening. Please upload here its content

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