[R] Boxplot from matrices

[johnhj]

Hii,

I will create boxplots from matrices. I have the following data sets:
5.0      1.78      2.99      2.019     0
10.0      1.79      3.00      1.744     0
15.0      1.78      2.98      1.936     0
20.0      1.78      2.99      1.975     0
25.0      1.73      2.91      3.591     0
30.0      1.79      3.00      1.966     0
35.0      1.79      3.00      2.451     0
40.0      1.79      3.00      1.853     0
45.0      1.79      3.00      2.077     0
50.0      1.79      3.00      1.943     0
55.0      1.79      3.00      2.608     0
60.0      1.79      3.00      1.790     0
65.0      1.79      3.00      1.893     0
70.0      1.79      3.00      2.079     0
75.0      1.77      2.97      2.200     0
80.0      1.79      3.01      1.868     0
85.0      1.78      2.99      2.179     0
90.0      1.70      2.85      2.305     0
95.0      1.71      2.87      1.854     0
100.0      1.79      3.00      2.362     0
105.0      1.79      3.00      3.634     0
110.0      1.79      3.00      1.578     0
115.0      1.79      3.00      1.835     0
120.0      1.79      3.00      2.359     0
125.0      1.79      3.00      2.542     0
130.0      1.76      2.95      2.620     0
135.0      1.79      3.00      4.181     0
140.0      1.79      3.00      1.375     0
145.0      1.79      3.00      2.872     0
150.0      1.79      3.00      3.002     0
155.0      1.79      3.00      3.712     0
160.0      1.79      3.01      3.175     0
165.0      1.79      3.00      2.821     0
170.0      1.79      3.00      3.320     0.078
175.0      1.79      3.00      2.076     0
180.0      1.77      2.97      2.186     0
185.0      1.78      2.99      4.652     0
190.0      1.79      3.01      2.051     0
195.0      1.79      3.00      1.922     0
200.0      1.79      3.00      1.945     0

The first thing I do is, to run the command
y<-matrix(c(test$V3),ncol=8)
to divide the third column in 8 matrices to create 8 boxplots.
The I run the command
w<-summary(y) 
to get the values min, max, mean, median, 1.Quan, 3.Quan

My problem is, I cann't run the plot command to create the 8 boxplots in a
graph...
The command 
plot(y)
gives me an error..

Can anybody help me to create the boxplot from matrices in a graph ?

greetings,
j

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