How to convert the matrix row to zeros except the last row in r
Assume that I have a matrix x. I would like to convert all its entries to zeros except the last row. For example, if x is as follows:
x <- matrix(3,11,11)
I would like to convert all the rows to zero except the last row, x[11,].
Any help, please?
r matrix
asked Nov 13 '18 at 7:31
MaryamMaryam
18211
add a comment |
Assume that I have a matrix x. I would like to convert all its entries to zeros except the last row. For example, if x is as follows:
x <- matrix(3,11,11)
I would like to convert all the rows to zero except the last row, x[11,].
Any help, please?
r matrix
asked Nov 13 '18 at 7:31
MaryamMaryam
18211
add a comment |
Assume that I have a matrix x. I would like to convert all its entries to zeros except the last row. For example, if x is as follows:
x <- matrix(3,11,11)
I would like to convert all the rows to zero except the last row, x[11,].
Any help, please?
r matrix
asked Nov 13 '18 at 7:31
MaryamMaryam
18211
Assume that I have a matrix x. I would like to convert all its entries to zeros except the last row. For example, if x is as follows:
x <- matrix(3,11,11)
I would like to convert all the rows to zero except the last row, x[11,].
Any help, please?
r matrix
r matrix
asked Nov 13 '18 at 7:31
MaryamMaryam
18211
asked Nov 13 '18 at 7:31
MaryamMaryam
18211
asked Nov 13 '18 at 7:31
MaryamMaryam
18211
asked Nov 13 '18 at 7:31
MaryamMaryam
18211
asked Nov 13 '18 at 7:31
MaryamMaryam
18211
18211
add a comment |
add a comment |
2 Answers
2
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Can also be done with negative indexing:
x[-nrow(x), ] <- 0
answered Nov 13 '18 at 7:50
snoramsnoram
6,402831
add a comment |
You can just index the rows of your matrix with 1:(nrow(x)-1) and assign them the value 0:
x[1:(nrow(x)-1),] <- 0
answered Nov 13 '18 at 7:33
FloSchmoFloSchmo
4486
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
Can also be done with negative indexing:
x[-nrow(x), ] <- 0
answered Nov 13 '18 at 7:50
snoramsnoram
6,402831
add a comment |
Can also be done with negative indexing:
x[-nrow(x), ] <- 0
answered Nov 13 '18 at 7:50
snoramsnoram
6,402831
add a comment |
Can also be done with negative indexing:
x[-nrow(x), ] <- 0
answered Nov 13 '18 at 7:50
snoramsnoram
6,402831
Can also be done with negative indexing:
x[-nrow(x), ] <- 0
answered Nov 13 '18 at 7:50
snoramsnoram
6,402831
answered Nov 13 '18 at 7:50
snoramsnoram
6,402831
answered Nov 13 '18 at 7:50
snoramsnoram
6,402831
answered Nov 13 '18 at 7:50
snoramsnoram
6,402831
6,402831
add a comment |
add a comment |
You can just index the rows of your matrix with 1:(nrow(x)-1) and assign them the value 0:
x[1:(nrow(x)-1),] <- 0
answered Nov 13 '18 at 7:33
FloSchmoFloSchmo
4486
add a comment |
You can just index the rows of your matrix with 1:(nrow(x)-1) and assign them the value 0:
x[1:(nrow(x)-1),] <- 0
answered Nov 13 '18 at 7:33
FloSchmoFloSchmo
4486
add a comment |
You can just index the rows of your matrix with 1:(nrow(x)-1) and assign them the value 0:
x[1:(nrow(x)-1),] <- 0
answered Nov 13 '18 at 7:33
FloSchmoFloSchmo
4486
You can just index the rows of your matrix with 1:(nrow(x)-1) and assign them the value 0:
x[1:(nrow(x)-1),] <- 0
answered Nov 13 '18 at 7:33
FloSchmoFloSchmo
4486
answered Nov 13 '18 at 7:33
FloSchmoFloSchmo
4486
answered Nov 13 '18 at 7:33
FloSchmoFloSchmo
4486
answered Nov 13 '18 at 7:33
FloSchmoFloSchmo
4486
4486
add a comment |
add a comment |
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