# [R] New var

Jeff Newmiller jdnewmil at dcn.davis.ca.us
Sat Jun 3 06:57:52 CEST 2017

```You do understand that this is not the "do my work for me" mailing list, don't you? You should be asking questions like "why doesn't my code do one of these if conditions?" so that you know HOW to write the rest of them yourself.

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--
Sent from my phone. Please excuse my brevity.

On June 2, 2017 8:49:11 PM PDT, Val <valkremk at gmail.com> wrote:
>Hi all,
>
>I have a data set with time interval and depending on the interval I
>want
>to create 5 more variables . Sample data below
>
>obs,   Start,   End
>1,2/1/2015,  1/1/2017
>2,4/11/2010, 1/1/2011
>3,1/4/2006,  5/3/2007
>4,10/1/2007, 1/1/2008
>5,6/1/2011,  1/1/2012
>6,10/15/2004,12/1/2004
>
>First, I want get  interval between the start date and end dates
>(End-start).
>
> obs,  Start , end, datediff
>1,2/1/2015,  1/1/2017, 700
>2,4/11/2010, 1/1/2011, 265
>3,1/4/2006,  5/3/2007, 484
>4,10/1/2007, 1/1/2008, 92
>5,6/1/2011,  1/1/2012, 214
>6,10/15/2004,12/1/2004,47
>
>Second. I want create 5 more variables  t1, t2, t3, t4 and  t5
>The value of each variable is defined as follows
>if datediff <   100 then  t1=1,  t2=t3=t4=t5=-1.
>if datediff >= 100 and  < 200 then  t1=0, t2=1,t3=t4=t5=-1,
>if datediff >= 200 and  < 300 then  t1=0, t2=0,t3=1,t4=t5=-1,
>if datediff >= 300 and  < 400 then  t1=0, t2=0,t3=0,t4=1,t5=-1,
>if datediff >= 400 and  < 500 then  t1=0, t2=0,t3=0,t4=0,t5=1,
>if datediff >= 500 then  t1=0, t2=0,t3=0,t4=0,t5=0
>
>The complete out put looks like as follow.
>obs, start,         end,    datediff,   t1, t2, t3, t4, t5
>1,    2/1/2015,   1/1/2017,    700, 0,  0,  0,  0,  0
>2,  4/11/2010,   1/1/2011,    265, 0,  0,  1, -1,  -1
>3,    1/4/2006,   5/3/2007,    484, 0,  0,  0, 0,   1
>4,   10/1/2007,  1/1/2008,      92, 1, -1, -1,-1,  -1
>5 ,    6/1/2011,    1/1/2012,  214,  0,  0,  1,-1,  -1
>6, 10/15/2004, 12/1/2004,     47, 1, -1, -1, -1, -1
>
>Thank you.
>
>	[[alternative HTML version deleted]]
>
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