matlab dummyvar is creating extra binary variable
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Let's say I have a categorical variable with level {'1', '2', '3'}. Now in ideal case, there should be 2 binary variable - b0 and b1 and above categorical variable should be mapped as b0=0,b1=0 for '1', b0=1,b1=0 for '2' and b0=0,b1=1 for '3'.
However, Matlab dummyvar is creating b0,b1,b2 binary variables. How can I get only 2 binary variables and above representation?
cat ={'1','2','3'}'
cat1 = categorical(cat)
result = dummyvar(cat1)
result =
1 0 0
0 1 0
0 0 1
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Respuesta aceptada
Jeff Miller
el 16 de Mzo. de 2019
I guess there is a typo in your question and you really want ''b0=1,b1=0 for '2'".
Notice that you get what (I think) you want if you just drop the first column created by dummyvar.
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