[R] character comp

[Val]

Hi Erin,  Yes, it is always  A's.

On Sat, Feb 9, 2019 at 12:22 PM Erin Hodgess <erinm.hodgess using gmail.com> wrote:
>
> Will it always be A’s or will there be a mix please?
>
> On Sat, Feb 9, 2019 at 11:06 AM Val <valkremk using gmail.com> wrote:
>>
>> Hi  All,
>> In a given data frame I  want to compare character values of two columns.
>> My sample data looks like as follow,
>>
>> mydataframe <- read.table( text='ID  var1 var2
>>   R1   AA  AAA
>>   R2   AAA AAA
>>   R3    A  AAAA
>>   R4   AA   A
>>   R5   A  AAA', header = TRUE, as.is = TRUE )
>>
>> For each ID, I want  create the third column "dvar" as  difference
>> between var1 and var2
>>  Row1( R1)   the "dvar" value will be -1 and the complete  desired out
>> put looks like as follow.
>>
>>  ID    var1 var2   dvar
>>  R1   AA    AAA    -1
>>  R2  AAA  AAA      0
>>  R3    A    AAAA    -3
>>  R4   AA       A        1
>>  R5    A     AAA      -2
>>
>> How do i do this? Any help please?
>> Thank you
>>
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>
> --
> Erin Hodgess, PhD
> mailto: erinm.hodgess using gmail.com