在画时间序列图过程中遇到以下问题,不知原因为何?
ts.plot(fmri[,2:5],lty=c(1,4),ylab="BOLD")Error in fmri[, 2:5] : incorrect number of dimensions
原数据fmri 来自package astsa,结构属性如下
names(fmri)
[1] "L1T1" "L1T2" "L1T3" "L1T4" "L1T5" "L1T6" "L2T1" "L2T2" "L2T3" "L2T4" "L2T5"
[12] "L2T6" "L3T1" "L3T2" "L3T3" "L3T4" "L3T5" "L3T6" "L4T1" "L4T2" "L4T3" "L4T4"
[23] "L4T5" "L4T6" "L5T1" "L5T2" "L5T3" "L5T4" "L5T5" "L5T6" "L6T1" "L6T2" "L6T3"
[34] "L6T4" "L6T5" "L6T6" "L7T1" "L7T2" "L7T3" "L7T4" "L7T5" "L7T6" "L8T1" "L8T2"
[45] "L8T3" "L8T4" "L8T5" "L8T6" "L9T1" "L9T2" "L9T3" "L9T4" "L9T5" "L9T6"
class(fmri)[1] "list"
summary(fmri)
Length Class Mode
L1T1 640 -none- numeric
L1T2 512 -none- numeric
L1T3 640 -none- numeric
L1T4 384 -none- numeric
L1T5 640 -none- numeric
L1T6 512 -none- numeric
L2T1 640 -none- numeric
L2T2 512 -none- numeric
L2T3 640 -none- numeric
L2T4 384 -none- numeric
......
L9T6 512 -none- numeric