Re: [R] densities greater than 1 for values within an (0, 1) intervall

2011-01-20 Thread Paul Ramer

How does one then interpret kernel density distributions with values greater
than one?  

My output from the density function.  
---
density(delt.m[[1]][,6], na.rm=TRUE)

Call:
density.default(x = delt.m[[1]][, 6], na.rm = TRUE)

Data: delt.m[[1]][, 6] (171 obs.);  Bandwidth 'bw' = 0.004501

   x  y   
 Min.   :-0.05211   Min.   : 0.00586  
 1st Qu.:-0.02177   1st Qu.: 0.43632  
 Median : 0.00856   Median : 3.08833  
 Mean   : 0.00856   Mean   : 8.23366  
 3rd Qu.: 0.03889   3rd Qu.:14.97542  
 Max.   : 0.06923   Max.   :30.04107
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Re: [R] densities greater than 1 for values within an (0, 1) intervall

2011-01-20 Thread David Winsemius

The same way you interpret densities less than one?
On Jan 20, 2011, at 2:28 PM, Paul Ramer wrote:



How does one then interpret kernel density distributions with values  
greater

than one?


The same way you interpret densities less than one?

density != probability



My output from the density function.
---
density(delt.m[[1]][,6], na.rm=TRUE)

Call:
density.default(x = delt.m[[1]][, 6], na.rm = TRUE)

Data: delt.m[[1]][, 6] (171 obs.);  Bandwidth 'bw' = 0.004501

  x  y
Min.   :-0.05211   Min.   : 0.00586
1st Qu.:-0.02177   1st Qu.: 0.43632
Median : 0.00856   Median : 3.08833
Mean   : 0.00856   Mean   : 8.23366
3rd Qu.: 0.03889   3rd Qu.:14.97542
Max.   : 0.06923   Max.   :30.04107


--

David Winsemius, MD
West Hartford, CT

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Re: [R] densities greater than 1 for values within an (0, 1) intervall

2010-07-12 Thread Jeff Newmiller
There is no constraint on the magnitude of probability density values, though 
the area under the curve must be equal to one. You may be thinking of 
cumulative probability distributions? If so, take a look at smoothed.df() in 
library (cwhmisc).

Katja Hillmann katja.hillm...@wiso.uni-hamburg.de wrote:

Hello,

I used the command kdensity in order to calculate the density of 
fractions/ratios (e.g. number of longterm unemployed on total 
unemployment). Thus I try to calculate the denisty of values less than 
1. However, the values of the kernel densitiy R provided (y-scale) are 
all greater than 1. Where is the problem and how may I solve it? Does R 
have problems in calculating distributions of variables within an 
intervall of 0 and 1?

Best,
Katja

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