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poliza
2011 Mar 04
7
Example of work with mongo
Hi there,
I''m newbie here and I have a problem with the connection with MongoDB.
The connection among Rails and MongoDB works, but I don''t know, how to
print only one "column" from document.
If I''m trying following a part of code:
puts db["testCollection"].find_one().inspect
So I''will get the entire structure of BSON, as:
2016 Apr 02
1
R model developing & validating - Open to Discussion
Throughout my R journey I have noticed the way we can use given data to
develop and validate a model.
Assume that you have given data for a problem
1. train.csv
2. test.csv
*Method A*
*Combine train+test data* and develop a model using the combined data. Then
use test.data to validate the model based on predicted error analysis.
*Method B*
Use *train data* to develop the model and then use