Missing Values in Weka --

weka
Randa Khaled picture Randa Khaled · Mar 22, 2012 · Viewed 20k times · Source

I'm using adult data from UCI Here, when I converted it to excel file ==> then import it in weka weka didn't recognize the missing values (which tells Missing:0 (0%)) , but the adult data contains missing values with " ?" value...

I checked the value in weka it also contains " ?" so, how can I replace all " ?" to " " !!! thanks

Answer

tolgabuyuktanir picture tolgabuyuktanir · Oct 30, 2014

I can say a method.

  1. chose filter
  2. chose unsupervised-attribute-ReplaceMissingValues
  3. Apply

ReplaceMissingValues use 'mean' or 'median' instead of missing values.

Related questions

Convert CSV to ARFF using weka

I've been trying to get this dataset http://archive.ics.uci.edu/ml/datasets/Communities+and+Crime+Unnormalized into Weka and no luck at all. I converted it to CSV and then loaded it into Weka and then tried to …

Read More
How to interpret weka classification?

How can we interpret the classification result in weka using naive bayes? How is mean, std deviation, weight sum and precision calculated? How is kappa statistic, mean absolute error, root mean squared error etc calculated? What is the interpretation of …

Read More
Cross Validation in Weka

I've always thought from what I read that cross validation is performed like this: In k-fold cross-validation, the original sample is randomly partitioned into k subsamples. Of the k subsamples, a single subsample is retained as the validation data for …

Read More