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*The author of this computation has been verified*
R Software Module: /rwasp_fitdistrnorm.wasp (opens new window with default values)
Title produced by software: Maximum-likelihood Fitting - Normal Distribution
Date of computation: Wed, 29 Dec 2010 12:36:23 +0000
 
Cite this page as follows:
Statistical Computations at FreeStatistics.org, Office for Research Development and Education, URL http://www.freestatistics.org/blog/date/2010/Dec/29/t1293626049b4chioep0aab9rd.htm/, Retrieved Wed, 29 Dec 2010 13:34:10 +0100
 
BibTeX entries for LaTeX users:
@Manual{KEY,
    author = {{YOUR NAME}},
    publisher = {Office for Research Development and Education},
    title = {Statistical Computations at FreeStatistics.org, URL http://www.freestatistics.org/blog/date/2010/Dec/29/t1293626049b4chioep0aab9rd.htm/},
    year = {2010},
}
@Manual{R,
    title = {R: A Language and Environment for Statistical Computing},
    author = {{R Development Core Team}},
    organization = {R Foundation for Statistical Computing},
    address = {Vienna, Austria},
    year = {2010},
    note = {{ISBN} 3-900051-07-0},
    url = {http://www.R-project.org},
}
 
Original text written by user:
 
IsPrivate?
No (this computation is public)
 
User-defined keywords:
 
Dataseries X:
» Textbox « » Textfile « » CSV «
09,166456 07,970589 07,104091 06,621064 07,529215 08,170938 08,157450 07,378962 07,921496 08,156740 08,856365 08,817177 08,734347 09,345927 08,992970 10,785120 08,886867 08,818847 08,823744 09,165298 08,652657 08,173054 07,563416 07,595809 08,381467 07,216432 06,540178 06,238914 05,487288 05,759462 05,993215 07,474726 07,348907 07,303379 07,119314 06,993780 06,958153 07,595706 08,088153 07,555753 07,315433 07,893427 08,858794 08,839367 08,014733 07,873465 08,930377 10,500550 12,611440 11,417870 11,872490 11,060820 12,043310 09,776299 09,557194 09,202590 10,224020 09,350807 08,300913 08,365779 08,133595 07,660470 08,074839 07,848597 07,998220 07,396895 07,900419 08,100500 07,899453 07,599783 08,100929 09,002175 10,298900 10,101520 10,699150 09,698140 09,800951 10,900470 10,697850 09,297252 10,397440 10,900720 12,901270 13,099060 11,698280 11,099870 11,301570 10,702110 10,099310 09,591119
 
Output produced by software:


Summary of computational transaction
Raw Inputview raw input (R code)
Raw Outputview raw output of R engine
Computing time1 seconds
R Server'RServer@AstonUniversity' @ vre.aston.ac.uk


ParameterEstimated ValueStandard Deviation
mean8.827266233333330.171165643042942
standard deviation1.623819867549160.121032386901821
 
Charts produced by software:
http://www.freestatistics.org/blog/date/2010/Dec/29/t1293626049b4chioep0aab9rd/1kijx1293626181.png (open in new window)
http://www.freestatistics.org/blog/date/2010/Dec/29/t1293626049b4chioep0aab9rd/1kijx1293626181.ps (open in new window)


 
Parameters (Session):
par1 = 8 ; par2 = 0 ;
 
Parameters (R input):
par1 = 8 ; par2 = 0 ;
 
R code (references can be found in the software module):
library(MASS)
par1 <- as.numeric(par1)
if (par2 == '0') par2 = 'Sturges' else par2 <- as.numeric(par2)
x <- as.ts(x) #otherwise the fitdistr function does not work properly
r <- fitdistr(x,'normal')
r
bitmap(file='test1.png')
myhist<-hist(x,col=par1,breaks=par2,main=main,ylab=ylab,xlab=xlab,freq=F)
curve(1/(r$estimate[2]*sqrt(2*pi))*exp(-1/2*((x-r$estimate[1])/r$estimate[2])^2),min(x),max(x),add=T)
dev.off()
load(file='createtable')
a<-table.start()
a<-table.row.start(a)
a<-table.element(a,'Parameter',1,TRUE)
a<-table.element(a,'Estimated Value',1,TRUE)
a<-table.element(a,'Standard Deviation',1,TRUE)
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'mean',header=TRUE)
a<-table.element(a,r$estimate[1])
a<-table.element(a,r$sd[1])
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'standard deviation',header=TRUE)
a<-table.element(a,r$estimate[2])
a<-table.element(a,r$sd[2])
a<-table.row.end(a)
a<-table.end(a)
table.save(a,file='mytable.tab')
 





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