Missing Observations error when running regression

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Sam P
Sam P 2018-6-6
评论： Sam P 2018-6-6
I am using MATLAB to complete some regression analysis,
Say I have 40 variables, 35 have the full dataset, monthly data from 1950-2010,
However, some have missing values at the start of the data set,
For example, 36 may only have 1969-2010, 27 1952-2010,
I tried to replace all blanks with a NaN and got the error message,
"Error using svd Input to SVD must not contain NaN"
Is there something I can do?
  1 个评论
Sam P
Sam P 2018-6-6
To be more clear,
I want to just run the shorter regression,
So if the data is missing,
I want to run y =beta(x),
If x36 only starts from 1952 I want the output of the above equation from 1952

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回答（1 个）

Shrestha Kumar
Shrestha Kumar 2018-6-6
Hi,
You can replace NaN with the mean of the data in the column(if it is a numerical value else take the mode). Also, NaN values can be present in the test data, so take care of that too.

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