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DoE, RSM: What does Factor A*Factor A mean?
http://www.talkstats.com/showthread.php/70028-DoE-RSM-What-does-Factor-A*Factor-A-mean?goto=newpost
Sat, 19 Aug 2017 08:07:09 GMTHello everyone,

For my thesis I have to make an optimization using DoE. Most of it is clear to me now, but there is one thing which i don't quite understand (see attachment, red circles). What is the difference between A and A*A? If anyone could help me with this I'd be greatful!

Thank you in advance

]]>Applied Statisticsmichelborstrokhttp://www.talkstats.com/showthread.php/70028-DoE-RSM-What-does-Factor-A*Factor-A-meancannot draw a histogram on R
http://www.talkstats.com/showthread.php/70027-cannot-draw-a-histogram-on-R?goto=newpost
Sat, 19 Aug 2017 02:13:45 GMTIm trying to draw a histogram with the code below.

stat <- read.csv("C://Desktop//lung cancer.csv",header=T)
x = (2000:2013)
y = (0:12000)
hist(stat$Year,stat$Cases, ylab="Cases",xlab="Year",main="Number of cases of Lung Cancer:2000-2013")

error message:

> hist(ylab="Cases",xlab="Year",main="Number of cases of Lung Cancer:2000-2013")
Error in hist.default(ylab = "Cases", xlab = "Year", main = "Number of cases of Lung Cancer:2000-2013") :
argument "x" is missing, with no default
> stat <- read.csv("C://Heramba//Desktop//lung cancer.csv",header=T)
Error in file(file, "rt") : cannot open the connection
In addition: Warning message:
In file(file, "rt") :
cannot open file 'C://Heramba//Desktop//lung cancer.csv': No such file or directory
]]>Rpolly123http://www.talkstats.com/showthread.php/70027-cannot-draw-a-histogram-on-RLooking for a simple random biased method to order a set
http://www.talkstats.com/showthread.php/70026-Looking-for-a-simple-random-biased-method-to-order-a-set?goto=newpost
Fri, 18 Aug 2017 16:00:07 GMTI am looking for a sampling method with the following característics :
1) I will divide the sampling set in two main groups. The members belonging...I am looking for a sampling method with the following característics :

1) I will divide the sampling set in two main groups. The members belonging to one of the those two groups will have a greater probability of being sampled than the members of the other group.

2) A specific criterial will direct the probability of any member of the main set (regardless of the subgroups described in 1) being sampled, but the wheight of this criteria in the sampling probability should be less strong than the criteria described in 1)

Can someone help me with that ? Thanks in advance.
]]>Applied StatisticsManoel Carloshttp://www.talkstats.com/showthread.php/70026-Looking-for-a-simple-random-biased-method-to-order-a-set