Help with function "fitdistr" in "MASS"

Thank you,man. the problem solved.
Plus. when I got the parameters of the data.
And I used the "truehist(mydata)" to get a histogram of the data,
How can I draw a line of the distribution of the estimated parameters in the
histogram plot?

for example:

fitdistr(na.exclude(mydata),"normal")

     mean         sd    
   4.052594   75.620350 
 ( 1.420743) ( 1.004617)

truehist(mydata)

After that, I got the histogram of mydata.
And I want plot a extra line of the density of a normal distribution of
mean=4.052594 and sd=75.620350 in the histogram plot?

thank you 



Bernardo Rangel tura wrote:

On Sat, 2010-01-02 at 23:20 -0800, Saji Ren wrote:

Hi, R users:

I want to fit my data into a normal distribution by using the command
"fitdistr" in "MASS".
I changed my data class from "ts" to "numeric" by

class(mydata)="numeric"

but after using "fitdistr", I got the result below

fitdistr(mydata,"normal")

  mean    sd 
  NA     NA  
 (NA)   (NA) 

the help doc of "fitdistr" does not mention anything about that, thus I
need
your help.

Thank you in advanced,
Saji from Shanghai

Hi Sajj,

You hava NA in your data

try: fitdistr(na.exclude(mydata),"normal")

-- 
Bernardo Rangel Tura, M.D,MPH,Ph.D
National Institute of Cardiology
Brazil