I encountered this problem before when I was doing a for loop, where the second layer of the loop is

`, ncol=3`

, so here the loop is going to be`for(j in 1:2)`

and then the assignment matrix is the following error.

After

, it was found on the Internet that the error was caused by improper alignment of array or matrix or out-of-bounds subscripts. After checking the code, it was found that there was indeed a small error, that is, `for(j in 1:ncol-1)`

is equivalent to `for(j in 0:1)`

. Obviously, an error will be reported when assigning the value. `for(j in 1: ncol-1))`

correct.

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