How can I convert a data frame into 3-D matrix with the values of two columns of data frame forming column...
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1
Let's say I have following dataframe
A B C C
a 1 ca da
b 2 cb db
c 3 cc dc
I want to convert above to the form .
[,,1]
a b c
1 ca 0 0
2 0 cb 0
3 0 0 cc
[,,2]
a b c
1 da 0 0
2 0 db 0
3 0 0 dc
r dataframe
asked Nov 23 '18 at 23:10
AmbAmb
193
|
show 1 more comment
1
Let's say I have following dataframe
A B C C
a 1 ca da
b 2 cb db
c 3 cc dc
I want to convert above to the form .
[,,1]
a b c
1 ca 0 0
2 0 cb 0
3 0 0 cc
[,,2]
a b c
1 da 0 0
2 0 db 0
3 0 0 dc
r dataframe
asked Nov 23 '18 at 23:10
AmbAmb
193
not sure this is exactly what you want (its not 3D) but ...reshape2::dcast(data=dat, B ~ A, value.var="C", fill=0)
– user20650
Nov 23 '18 at 23:21
@user20650 Can you give one more look
– Amb
Nov 23 '18 at 23:29
I'm not sure. I must admit, the fact you are using matrices/arrays to mix characters and zeros makes this a wee bit weird ;)
– user20650
Nov 23 '18 at 23:33
1
okay, here is a monster!simplify2array(lapply(c("C", "D"), function(i) reshape2::acast(data=dat, B ~ A , value.var=i, fill=0)))
– user20650
Nov 23 '18 at 23:39
1
@user20650 Wow! It works. Thanks! Now, time for me to understand how it works
– Amb
Nov 23 '18 at 23:48
|
show 1 more comment
1
1
1
2
Let's say I have following dataframe
A B C C
a 1 ca da
b 2 cb db
c 3 cc dc
I want to convert above to the form .
[,,1]
a b c
1 ca 0 0
2 0 cb 0
3 0 0 cc
[,,2]
a b c
1 da 0 0
2 0 db 0
3 0 0 dc
r dataframe
asked Nov 23 '18 at 23:10
AmbAmb
193
Let's say I have following dataframe
A B C C
a 1 ca da
b 2 cb db
c 3 cc dc
I want to convert above to the form .
[,,1]
a b c
1 ca 0 0
2 0 cb 0
3 0 0 cc
[,,2]
a b c
1 da 0 0
2 0 db 0
3 0 0 dc
r dataframe
r dataframe
asked Nov 23 '18 at 23:10
AmbAmb
193
asked Nov 23 '18 at 23:10
AmbAmb
193
edited Nov 23 '18 at 23:28
Amb
asked Nov 23 '18 at 23:10
AmbAmb
193
asked Nov 23 '18 at 23:10
AmbAmb
193
asked Nov 23 '18 at 23:10
AmbAmb
193
193
not sure this is exactly what you want (its not 3D) but ...reshape2::dcast(data=dat, B ~ A, value.var="C", fill=0)
– user20650
Nov 23 '18 at 23:21
@user20650 Can you give one more look
– Amb
Nov 23 '18 at 23:29
I'm not sure. I must admit, the fact you are using matrices/arrays to mix characters and zeros makes this a wee bit weird ;)
– user20650
Nov 23 '18 at 23:33
1
okay, here is a monster!simplify2array(lapply(c("C", "D"), function(i) reshape2::acast(data=dat, B ~ A , value.var=i, fill=0)))
– user20650
Nov 23 '18 at 23:39
1
@user20650 Wow! It works. Thanks! Now, time for me to understand how it works
– Amb
Nov 23 '18 at 23:48
|
show 1 more comment
not sure this is exactly what you want (its not 3D) but ...reshape2::dcast(data=dat, B ~ A, value.var="C", fill=0)
– user20650
Nov 23 '18 at 23:21
@user20650 Can you give one more look
– Amb
Nov 23 '18 at 23:29
I'm not sure. I must admit, the fact you are using matrices/arrays to mix characters and zeros makes this a wee bit weird ;)
– user20650
Nov 23 '18 at 23:33
1
okay, here is a monster!simplify2array(lapply(c("C", "D"), function(i) reshape2::acast(data=dat, B ~ A , value.var=i, fill=0)))
– user20650
Nov 23 '18 at 23:39
1
@user20650 Wow! It works. Thanks! Now, time for me to understand how it works
– Amb
Nov 23 '18 at 23:48
not sure this is exactly what you want (its not 3D) but ...
reshape2::dcast(data=dat, B ~ A, value.var="C", fill=0)– user20650
Nov 23 '18 at 23:21
not sure this is exactly what you want (its not 3D) but ...
reshape2::dcast(data=dat, B ~ A, value.var="C", fill=0)– user20650
Nov 23 '18 at 23:21
@user20650 Can you give one more look
– Amb
Nov 23 '18 at 23:29
@user20650 Can you give one more look
– Amb
Nov 23 '18 at 23:29
I'm not sure. I must admit, the fact you are using matrices/arrays to mix characters and zeros makes this a wee bit weird ;)
– user20650
Nov 23 '18 at 23:33
I'm not sure. I must admit, the fact you are using matrices/arrays to mix characters and zeros makes this a wee bit weird ;)
– user20650
Nov 23 '18 at 23:33
1
1
okay, here is a monster!
simplify2array(lapply(c("C", "D"), function(i) reshape2::acast(data=dat, B ~ A , value.var=i, fill=0)))– user20650
Nov 23 '18 at 23:39
okay, here is a monster!
simplify2array(lapply(c("C", "D"), function(i) reshape2::acast(data=dat, B ~ A , value.var=i, fill=0)))– user20650
Nov 23 '18 at 23:39
1
1
@user20650 Wow! It works. Thanks! Now, time for me to understand how it works
– Amb
Nov 23 '18 at 23:48
@user20650 Wow! It works. Thanks! Now, time for me to understand how it works
– Amb
Nov 23 '18 at 23:48
|
show 1 more comment
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not sure this is exactly what you want (its not 3D) but ...
reshape2::dcast(data=dat, B ~ A, value.var="C", fill=0)– user20650
Nov 23 '18 at 23:21
@user20650 Can you give one more look
– Amb
Nov 23 '18 at 23:29
I'm not sure. I must admit, the fact you are using matrices/arrays to mix characters and zeros makes this a wee bit weird ;)
– user20650
Nov 23 '18 at 23:33
1
okay, here is a monster!
simplify2array(lapply(c("C", "D"), function(i) reshape2::acast(data=dat, B ~ A , value.var=i, fill=0)))– user20650
Nov 23 '18 at 23:39
1
@user20650 Wow! It works. Thanks! Now, time for me to understand how it works
– Amb
Nov 23 '18 at 23:48