R help - Oct 2007 - how to specify bin width in hist()

Hi all user,

I have been wondering how the bin width can be specified in hist().

Thanks in advance,

Abu
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Abu Naser wrote:
> Hi all user,
> 
> I have been wondering how the bin width can be specified in hist().
Hi Abu,

If you want constant bin widths (e.g. from 0 to 10), it's easy:

my.bin.width<-2
hist(...,breaks=seq(0,10,by=my.bin.width),...)

and the "by" argument is your width. If you want completely customized
bin widths (which may not be a great idea):

my.bin.widths<-c(2,3,4,1)
hist(...,breaks=c(0,cumsum(my.bin.widths)),...)

also look at the right= argument to decide whether to include the lower 
or higher break value in each bin.

Jim

Thanks Jim for your response. I will use constant bin width.

One more question:

Is there anyway I can 2d or 3d histogram calculation/count?

With regards,
Abu