我的代码
m1 <- read.table("mt6.1r1.rf", header = FALSE)
m2 <- read.table("mt6.1r2.rf", header = FALSE)
m3 <- read.table("mt6.2r1.rf", header = FALSE)
m4 <- read.table("mt6.2r2.rf", header = FALSE)
p1=m1[0]
per1=log10(p1)
ixxr=m1[2]
ixxi=m1[3]
p2=m2[0]
per2=log10(p2)
ixyr=m2[2]
ixyi=m2[3]
p3=m3[0]
per3=log10(p3)
iyxr=m3[2]
iyxi=m3[3]
p4=m4[0]
per4=log10(p4)
iyyr=m4[2]
iyyi=m4[3]
erxx=m1[4]
erxy=m2[4]
eryx=m3[4]
eryy=m4[4]
我希望看到数据框的数字内容（检查正确的输入）。终端中获取信息就是这样
> p1
data frame with 0 columns and 20 rows
> per1
data frame with 0 columns and 20 rows
> ixxr
V2
1 0.00153600
2 0.00204800
3 0.00307200
4 0.00409600
5 0.00614400
6 0.00819200
7 0.01228800
8 0.01638400
9 0.02457600
10 0.03276800
11 0.04915515
12 0.06554019
13 0.09831029
14 0.13108040
15 0.19662060
16 0.26216080
17 0.39344260
18 0.52459010
19 0.78688530
20 1.04918000
> typeof(ixxr)
[1] "list"
> typeof(per1)
[1] "list"
> per1
data frame with 0 columns and 20 rows
为什么R没有显示per1的完整内容？与ixxr相比有什么不同？