我正在尝试使用R中的sampleSelection包中的heckit函数。出现以下错误。
Error in solve.default(crossprod(xMat)) :
Lapack routine dgesv: system is exactly singular: U[6,6] = 0
我一直在寻找这个问题的答案，但它们本身并没有提供解决方案，而且都与该特定软件包无关。
这是我使用的代码（原始数据在下面）
library(sampleSelection)
summary(heckit(a$V1 ~ a$V3 + a$V4 + a$V5 + a$V6 + a$V7 + a$V8 + a$V9 + a$V10 + a$V11 + a$V12,a$V2 ~ a$V3 + a$V4 + a$V5 + a$V6 + a$V7 + a$V8 + a$V9 + a$V10 + a$V11 + a$V12, data=combined, method="2step"))
导致此错误
Error in solve.default(crossprod(xMat)) :
Lapack routine dgesv: system is exactly singular: U[6,6] = 0
我尝试按照建议从结果（第二个）方程式中删除一个变量，但是它不起作用。我该如何解决？
这是我的数据...
structure(list(V1 = c(0, 1, 1, 0, 0, 1, 0, 0, 0, 0, 1, 1, 0,
0, 1, 1, 1, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 1, 1, 0, 1, 0, 1, 1,
1, 0, 0, 1, 1, 1, 1, 0, 0, 1, 1, 0, 0, 0, 1, 1, 1, 0, 0, 0, 1,
0, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 0, 1, 1, 0, 1, 0, 0, 1, 0, 0,
0, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1, 1, 1, 1, 0, 1, 0, 1, 1, 1, 0,
1, 1, 1, 1, 1, 1, 0, 1, 0, 0, 0, 0, 1, 0, 1, 1, 1, 1, 1, 0, 0,
0, 0, 0, 1, 0, 1, 1, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1, 0,
0, 1, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 0,
0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 1, 1,
1, 0, 0, 0, 0, 0, 1, 0, 0, 1, 1, 1, 1, 0, 1, 1, 0, 0, 1, 0, 0,
1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 0, 1,
1, 1, 1, 0, 1, 0, 1, 1, 1, 0, 0, 1, 1, 0, 1, 1, 1, 0, 0, 0, 1,
1, 0, 0, 0, 0, 0, 1, 1, 0, 1, 1, 0, 0, 1, 1), V2 = c(0, 20000,
10, 0, 0, 25, 0, 0, 0, 0, 40, 100, 0, 0, 40, 20, 1000, 50, 25,
0, 100, 0, 0, 50, 0, 10, 50, 25000, 3, 0, 300, 0, 1000, 10, 50,
0, 0, 5, 20, 25, 10, 0, 0, 100, 25, 0, 0, 0, 25, 10, 100, 0,
0, 0, 50, 0, 50, 1, 25, 10, 20, 50, 10, 0, 200, 20, 0, 10, 90000,
0, 5, 0, 0, 25, 0, 0, 0, 100, 200, 100, 50, 0, 0, 100, 10, 10,
25, 50, 50, 100, 0, 28220, 0, 50, 10, 250, 0, 100, 1e+05, 50,
120, 40, 50, 0, 50, 0, 0, 0, 0, 100, 0, 50, 150, 100, 15, 100,
0, 0, 0, 0, 0, 50, 0, 20, 100, 0, 0, 0, 20000, 240, 0, 0, 0,
0, 0, 0, 50, 20, 0, 0, 50, 30, 0, 0, 0, 100, 0, 5, 0, 0, 0, 0,
25, 24, 20, 20, 100, 20, 4, 40, 1000, 5, 0, 100, 20, 10, 50,
23, 100, 25, 50, 50, 5, 100, 120, 0, 5, 9, 25, 24, 0, 0, 0, 150,
0, 20, 0, 0, 0, 0, 0, 0, 0, 0, 25, 200, 4000, 0, 0, 0, 100, 50,
15, 0, 0, 0, 0, 0, 20, 0, 0, 5, 20, 25, 50, 0, 10, 20, 0, 0,
5, 0, 0, 250, 0, 100, 100, 0, 300, 175, 25, 100, 25, 250, 0,
100, 100, 100, 50, 100, 100, 20, 0, 100, 100, 100, 10, 0, 100,
0, 10, 25, 20, 0, 0, 100, 20, 0, 100, 30, 120, 0, 0, 0, 120,
100, 0, 0, 0, 0, 0, 25, 50, 0, 5, 10, 0, 0, 10, 500), V3 = c(0,
1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 1, 1, 1, 1, 1, 1,
0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 1, 1, 1, 0, 1, 1, 1,
1, 0, 1, 0, 1, 1, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 1, 1, 1, 1,
0, 0, 1, 0, 1, 0), V4 = c(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0), V5 = c(0, 0,
1, 0, 0, 1, 1, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 1, 1, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0,
0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0,
0, 0, 1, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 1, 0, 1, 1, 0, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 1, 1, 0, 0, 0,
0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 1, 0, 1, 0, 1, 0, 0, 0, 0, 1, 0,
0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0,
0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0,
1, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0), V6 = c(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1,
0, 0, 0, 1, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0,
1, 1, 0, 0, 1, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1,
1, 0, 0, 0, 0, 1, 0, 1, 0, 0, 1, 1, 0, 0, 0, 1, 1, 1, 1, 1, 0,
0, 1, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 1, 0, 0, 0, 0, 1, 0, 0, 0,
1, 1, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 1, 1, 1,
1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 1, 0,
1, 0, 0, 0, 0, 1, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 0, 1, 1, 0, 0,
1, 0, 0, 0, 1, 0, 0, 0, 1, 1, 0, 1, 0, 0, 0, 1, 1, 1, 1, 1, 1,
0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0,
0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0,
0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1), V7 = c(0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0), V8 = c(42, 3, 51, 32, 43, 32, 39, 21, 67, 10, 38,
39, 47, 10, 5, 21, 39, 54, 38, 36, 35, 20, 54, 23, 10, 26, 12,
33, 23, 0, 2, 36, 2, 28, 18, 20, 31, 63, 48, 20, 5, 34, 42, 30,
35, 30, 27, 36, 33, 26, 40, 2, 36, 31, 5, 40, 8, 25, 3, 7, 21,
2, 18, 19, 0, 15, 29, 25, 15, 44, 17, 47, 56, 47, 36, 20, 20,
20, 10, 35, 48, 28, 40, 5, 25, 11, 38, 30, 36, 4, 29, 10, 24,
8, 31, 10, 42, 53, 28, 29, 19, 34, 41, 27, 23, 30, 4, 6, 26,
28, 48, 47, 9, 20, 45, 22, 2, 16, 4, 25, 40, 7, 15, 0, 0, 2,
43, 0, 19, 22, 10, 21, 35, 30, 3, 27, 12, 3, 38, 18, 7, 20, 32,
21, 13, 43, 42, 28, 21, 42, 29, 17, 20, 30, 48, 35, 23, 47, 32,
32, 32, 22, 32, 7, 28, 5, 26, 20, 33, 43, 29, 8, 44, 30, 42,
21, 1, 0, 32, 4, 18, 40, 62, 9, 43, 32, 29, 18, 39, 17, 6, 0,
41, 22, 30, 6, 20, 47, 20, 18, 54, 47, 23, 29, 36, 20, 35, 2,
37, 4, 32, 54, 47, 9, 25, 12, 25, 0, 10, 31, 26, 0, 32, 4, 14,
26, 58, 47, 80, 31, 42, 68, 49, 39, 71, 17, 58, 46, 58, 30, 60,
52, 22, 34, 32, 67, 30, 55, 24, 36, 25, 52, 39, 30, 0, 60, 1,
48, 30, 6, 1, 28, 19, 0, 48, 38, 70, 0, 5, 1, 30, 43, 38, 62,
37, 25, 51, 23, 32, 10), V9 = c(7, 6, 4, 3, 5, 6, 3, 1, 4, 3,
4, 10, 4, 2, 1, 3, 1, 8, 2, 10, 3, 9, 6, 7, 3, 1, 2, 4, 12, 5,
5, 7, 6, 5, 6, 5, 1, 1, 4, 4, 4, 6, 8, 3, 9, 12, 12, 1, 6, 4,
5, 13, 1, 6, 3, 6, 1, 7, 2, 3, 1, 5, 8, 5, 1, 5, 1, 5, 8, 3,
6, 4, 2, 3, 10, 7, 3, 4, 12, 3, 6, 3, 5, 13, 6, 5, 2, 4, 4, 4,
7, 2, 6, 5, 6, 5, 2, 8, 4, 4, 3, 5, 3, 3, 12, 1, 10, 6, 6, 8,
3, 4, 8, 10, 6, 5, 2, 9, 8, 12, 8, 12, 6, 13, 3, 2, 10, 6, 2,
10, 5, 12, 6, 3, 5, 1, 6, 10, 7, 6, 9, 4, 6, 12, 8, 13, 8, 3,
1, 3, 7, 10, 4, 8, 1, 9, 12, 3, 5, 5, 5, 4, 2, 9, 1, 9, 1, 12,
7, 2, 1, 3, 5, 3, 8, 2, 1, 3, 2, 5, 5, 5, 12, 8, 8, 3, 6, 3,
12, 9, 9, 4, 2, 3, 3, 7, 3, 4, 6, 2, 8, 5, 5, 3, 4, 4, 6, 9,
10, 1, 6, 4, 1, 5, 9, 7, 6, 7, 1, 1, 12, 11, 2, 2, 4, 4, 8, 5,
6, 9, 9, 8, 13, 9, 4, 1, 6, 8, 2, 8, 3, 4, 3, 8, 5, 6, 8, 3,
7, 3, 2, 3, 1, 12, 11, 11, 1, 13, 6, 4, 5, 2, 12, 11, 12, 5,
4, 10, 8, 3, 13, 4, 5, 11, 1, 5, 9, 9, 1, 1), V10 = c(1, 1, 1,
1, 1, 0, 1, 0, 1, 0, 1, 1, 0, 0, 1, 0, 0, 1, 1, 1, 1, 1, 0, 0,
0, 1, 1, 1, 0, 1, 1, 0, 1, 1, 1, 1, 0, 1, 1, 0, 0, 1, 1, 1, 1,
1, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 1, 0,
0, 0, 1, 0, 1, 0, 1, 1, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 0, 0, 1,
0, 0, 0, 0, 1, 0, 1, 1, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0, 0, 0, 1,
0, 1, 0, 1, 0, 1, 1, 0, 0, 0, 1, 0, 1, 0, 1, 1, 1, 1, 1, 1, 0,
0, 1, 0, 1, 1, 1, 1, 0, 1, 0, 1, 1, 0, 1, 1, 0, 1, 1, 1, 0, 0,
0, 0, 0, 1, 0, 0, 0, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1,
0, 1, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 0, 1, 1, 1, 0, 1, 1, 1, 0,
1, 1, 0, 1, 1, 0, 0, 1, 1, 1, 0, 1, 0, 0, 1, 1, 1, 0, 1, 1, 1,
1, 1, 0, 1, 0, 1, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1,
1, 0, 1, 1, 1, 1, 0, 0, 1, 0, 1, 0, 1, 1, 0, 0, 1, 0, 0, 0, 0,
1, 1, 1, 1, 1, 0, 1, 0, 0, 1, 1, 0, 1, 1, 0, 1, 1, 1, 1, 0, 1,
0, 0, 1, 1), V11 = c(2, 3, 2, 1, 2, 3, 7, 1, 7, 7, 1, 6, 2, 1,
4, 2, 1, 2, 5, 3, 2, 7, 6, 8, 1, 3, 4, 2, 3, 2, 4, 3, 2, 4, 3,
2, 4, 6, 3, 3, 1, 1, 1, 4, 5, 6, 1, 6, 3, 4, 2, 2, 3, 1, 3, 1,
4, 4, 3, 5, 2, 5, 6, 4, 9, 2, 2, 1, 5, 1, 6, 2, 5, 3, 2, 4, 1,
4, 2, 3, 3, 1, 1, 3, 2, 3, 5, 2, 2, 1, 4, 2, 4, 4, 2, 3, 1, 2,
8, 5, 4, 5, 2, 2, 2, 2, 3, 5, 6, 4, 5, 2, 2, 8, 1, 7, 3, 4, 2,
2, 1, 3, 2, 5, 3, 1, 2, 1, 2, 6, 3, 3, 2, 2, 1, 5, 4, 5, 4, 8,
2, 3, 2, 2, 3, 6, 3, 1, 5, 6, 1, 6, 2, 4, 3, 2, 2, 5, 4, 5, 5,
1, 3, 1, 4, 3, 2, 5, 1, 6, 5, 2, 4, 2, 4, 5, 1, 2, 5, 4, 2, 6,
2, 1, 3, 1, 3, 2, 4, 2, 3, 3, 1, 5, 2, 4, 5, 3, 2, 3, 3, 7, 6,
2, 3, 1, 4, 2, 4, 4, 6, 1, 5, 4, 3, 5, 2, 1, 2, 4, 4, 1, 5, 6,
3, 7, 6, 8, 5, 8, 4, 6, 2, 9, 5, 6, 6, 7, 5, 5, 3, 3, 4, 2, 4,
4, 3, 5, 3, 1, 1, 9, 4, 2, 1, 5, 3, 2, 2, 6, 2, 2, 2, 1, 2, 6,
1, 2, 2, 2, 5, 1, 4, 3, 3, 2, 6, 1, 5, 2), V12 = c(0, 0, 0, 0,
0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0,
0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0,
0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0,
0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0,
0, 1, 0)), row.names = c(NA, -280L), class = "data.frame")