Errors when opening arff file into weka

Question

1.00/5 (2 votes)

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@RELATION abalone

@ATTRIBUTE sex REAL
@ATTRIBUTE length REAL
@ATTRIBUTE diameter REAL
@ATTRIBUTE height REAL
@ATTRIBUTE wholeWeight REAL
@ATTRIBUTE shuckedWeight REAL
@ATTRIBUTE visceraWeight REAL
@ATTRIBUTE shellWeight REAL
@ATTRIBUTE rings REAL
@ATTRIBUTE class { Male,Female,Infant }

@DATA
M,0.455,0.365,0.095,0.514,0.2245,0.101,0.15,15
M,0.35,0.265,0.09,0.2255,0.0995,0.0485,0.07,7
F,0.53,0.42,0.135,0.677,0.2565,0.1415,0.21,9
M,0.44,0.365,0.125,0.516,0.2155,0.114,0.155,10
I,0.33,0.255,0.08,0.205,0.0895,0.0395,0.055,7
I,0.425,0.3,0.095,0.3515,0.141,0.0775,0.12,8
F,0.53,0.415,0.15,0.7775,0.237,0.1415,0.33,20
F,0.545,0.425,0.125,0.768,0.294,0.1495,0.26,16
M,0.475,0.37,0.125,0.5095,0.2165,0.1125,0.165,9
F,0.55,0.44,0.15,0.8945,0.3145,0.151,0.32,19

What I have tried:

Whenever opening this file in weka constantly receive errors 'not recognised as an 'Arff data files' file. Reason: number expected, read Token[M], line 16. However whenever I try to rectify an error another would pop up. New to this and so would anyone know where I seem to be making the mistake. Appreciate the help.

Posted 20-Feb-20 3:41am

Hamza Nadeem

Updated 20-Feb-20 4:30am

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Richard MacCutchan · Answer 1 · 2020-02-20T04:30:00

@ATTRIBUTE sex REAL

@DATA
M,0.455,0.365,0.095,0.514,0.2245,0.101,0.15,15

You have declared column 1 (Sex) as a REAL type, but your data uses a character type. I have never heard of Weka or ARFF but found the information quite easily at Arff stable - Weka Wiki[^].

[edit]
Also you have a final ATTRIBUTE

@ATTRIBUTE class { Male,Female,Infant }

But no corresponding column in your data.
[/edit]