[R] substring simultaneous conditions

[Rosa Oliveira]

Dear all,

I have searched all over and didn´t found an answer :( Sorry, I'm new.

I need urgently to "not analyse"the weight the ID's that have 07 in the
position 3 and 4 respectively, 01 or 11 in positions 11 and 12 of ID
variable. .

I used the following code:

base<--baseR[substr(baseR$'ID',3,4)!='03'
                      &substr(baseR$'ID',11,12)!='01'
                       &substr(baseR$'ID',11,12)!='11',]

But, instead of removing just the id's that respect the 3 conditions
simultaneously, base don't have all the id's that have 03 in the 3 and 4
positions os id variable, neither 01  in positions 11 and 12 of ID, neither 11
in positions 11 and 12 of ID variable.variable.

So, it seems, that the code exclude all the conditions, as it was a OR (|)
condition in spite of AND (&) condition.

Can anyone help me please?

I attach the data.

Best,
Rosa Oliveira

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