[R] cut data into sevral group and assign calculated values individually

[Li, Yan]

Thanks for your reply.

Let me make an example then:

m<- c(150, 400, 500,750,800, NA)

How can I use cut to generate the m_group as c(0,0.4755,1, 0.2275,0,0):

Breaks                  331.04      476.07      608.66       791.5                    NA
m_group        0                 x          1           x               0              0

Thank you very much!

Regards,
Yan

-----Original Message-----
From: Uwe Ligges [mailto:ligges at statistik.tu-dortmund.de] 
Sent: Tuesday, October 18, 2011 5:23 AM
To: Li, Yan
Cc: r-help at r-project.org
Subject: Re: [R] cut data into sevral group and assign calculated values individually



On 17.10.2011 20:53, Li, Yan wrote:
> Hi All,
>
> I have some data from which I set four points to be breaks. Based on these points,  I cut the dataset into four groups and assign a number to it:
>
> <=331.04 assign 0
>> 331.04<=476.07 assign data-331.04/(476.07-331.04)
>> 476.07<=608.66  assign 1
>> 608.66<=791.5 assign 791.5- data/(791.5-608.66)
>> 791.5 and NA assign 0
>
>
> Breaks                  331.04      476.07      608.66       791.5                    NA
> m_group        0                 x                 1                 x               0                    0
>
>
> I can use cut() to group the data according to the breaks but having difficulty to assign the two calculated interval values.
>


Based on the levels of the factor resulted by cut(), you can calculate a 
new vector easily. But since you have not specified a reproducible 
example, I cannot quickly change it in order to show how it works.

Best,
Uwe Ligges



> Thank you very much!
>
> Regards,
> Yan
>
> 	[[alternative HTML version deleted]]
>
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