R
!!!cronbach.alpha()
{{outline}}
----
 library(ltm)

!!データフォーマット
{{pre
str(goi2007.dat)

'data.frame':	222 obs. of  40 variables:
 $ X1 : int  1 1 1 1 1 1 1 1 1 0 ...
 $ X2 : int  1 1 1 1 1 1 1 1 1 1 ...
 $ X3 : int  1 1 1 1 1 1 1 1 1 1 ...
 $ X4 : int  0 1 0 1 0 1 1 0 1 0 ...
 $ X5 : int  0 1 0 1 0 1 1 0 1 1 ...
 $ X6 : int  1 1 1 1 0 1 1 0 1 1 ...
}}

{{pre
head(goi2007.dat)


 
 
X1
<int>
X2
<int>
X3
<int>
X4
<int>
X5
<int>
X6
<int>
X7
<int>
X8
<int>
X9
<int>
1	1	1	1	0	0	1	1	1	1	
2	1	1	1	1	1	1	1	1	1	
3	1	1	1	0	0	1	0	1	1	
4	1	1	1	1	1	1	1	1	1	
5	1	1	1	0	0	0	1	1	1	
6	1	1	1	1	1	1	1	1	1	
}}