Subtracting the last elements in each raw in two lists
up vote
6
down vote
favorite
There are two lists:
list1 = {{1, 2, 4}, {1, 3, 5}, {2, 5, 7}};
list2 = {{1, 2, 7}, {1, 3, 3}, {2, 5, 6}};
How can we subtract the last number of each raw in list2 from list1 as
diff = {{1, 2, 3}, {1, 3, -2}, {2, 5, -1}}
list-manipulation
edited Nov 22 at 17:43
kglr
175k9197402
asked Nov 22 at 13:57
monfneg
1336
add a comment |
up vote
6
down vote
favorite
There are two lists:
list1 = {{1, 2, 4}, {1, 3, 5}, {2, 5, 7}};
list2 = {{1, 2, 7}, {1, 3, 3}, {2, 5, 6}};
How can we subtract the last number of each raw in list2 from list1 as
diff = {{1, 2, 3}, {1, 3, -2}, {2, 5, -1}}
list-manipulation
edited Nov 22 at 17:43
kglr
175k9197402
asked Nov 22 at 13:57
monfneg
1336
add a comment |
up vote
6
down vote
favorite
up vote
6
down vote
favorite
There are two lists:
list1 = {{1, 2, 4}, {1, 3, 5}, {2, 5, 7}};
list2 = {{1, 2, 7}, {1, 3, 3}, {2, 5, 6}};
How can we subtract the last number of each raw in list2 from list1 as
diff = {{1, 2, 3}, {1, 3, -2}, {2, 5, -1}}
list-manipulation
edited Nov 22 at 17:43
kglr
175k9197402
asked Nov 22 at 13:57
monfneg
1336
There are two lists:
list1 = {{1, 2, 4}, {1, 3, 5}, {2, 5, 7}};
list2 = {{1, 2, 7}, {1, 3, 3}, {2, 5, 6}};
How can we subtract the last number of each raw in list2 from list1 as
diff = {{1, 2, 3}, {1, 3, -2}, {2, 5, -1}}
list-manipulation
list-manipulation
edited Nov 22 at 17:43
kglr
175k9197402
asked Nov 22 at 13:57
monfneg
1336
edited Nov 22 at 17:43
kglr
175k9197402
asked Nov 22 at 13:57
monfneg
1336
edited Nov 22 at 17:43
kglr
175k9197402
edited Nov 22 at 17:43
kglr
175k9197402
edited Nov 22 at 17:43
kglr
175k9197402
175k9197402
asked Nov 22 at 13:57
monfneg
1336
asked Nov 22 at 13:57
monfneg
1336
asked Nov 22 at 13:57
monfneg
1336
1336
add a comment |
add a comment |
3 Answers
3
active
oldest
votes
up vote
7
down vote
accepted
diff = list1;
diff[[All, -1]] = Subtract[list2[[All, -1]], list1[[All, -1]]];
diff
{{1, 2, 3}, {1, 3, -2}, {2, 5, -1}}
answered Nov 22 at 14:00
kglr
175k9197402
add a comment |
up vote
3
down vote
Another solution:
list1 // ReplacePart[ {i_, 3} :> Differences[ {list1, list2}, {1, 0} ][[ 1, i, 3]] ]
{{1, 2, 3}, {1, 3, -2}, {2, 5, -1}}
answered Nov 22 at 14:53
gwr
7,35122457
add a comment |
up vote
2
down vote
Try this:
Transpose[
Append[Transpose[list1 ][[1 ;; 2]],
Last[Transpose[list2 ] - Transpose[list1 ]]]]
(* {{1, 2, 3}, {1, 3, -2}, {2, 5, -1}} *)
Have fun!
answered Nov 22 at 14:08
Alexei Boulbitch
21.2k2369
add a comment |
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3 Answers
3
active
oldest
votes
3 Answers
3
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
7
down vote
accepted
diff = list1;
diff[[All, -1]] = Subtract[list2[[All, -1]], list1[[All, -1]]];
diff
{{1, 2, 3}, {1, 3, -2}, {2, 5, -1}}
answered Nov 22 at 14:00
kglr
175k9197402
add a comment |
up vote
7
down vote
accepted
diff = list1;
diff[[All, -1]] = Subtract[list2[[All, -1]], list1[[All, -1]]];
diff
{{1, 2, 3}, {1, 3, -2}, {2, 5, -1}}
answered Nov 22 at 14:00
kglr
175k9197402
add a comment |
up vote
7
down vote
accepted
up vote
7
down vote
accepted
diff = list1;
diff[[All, -1]] = Subtract[list2[[All, -1]], list1[[All, -1]]];
diff
{{1, 2, 3}, {1, 3, -2}, {2, 5, -1}}
answered Nov 22 at 14:00
kglr
175k9197402
diff = list1;
diff[[All, -1]] = Subtract[list2[[All, -1]], list1[[All, -1]]];
diff
{{1, 2, 3}, {1, 3, -2}, {2, 5, -1}}
answered Nov 22 at 14:00
kglr
175k9197402
answered Nov 22 at 14:00
kglr
175k9197402
answered Nov 22 at 14:00
kglr
175k9197402
answered Nov 22 at 14:00
kglr
175k9197402
175k9197402
add a comment |
add a comment |
up vote
3
down vote
Another solution:
list1 // ReplacePart[ {i_, 3} :> Differences[ {list1, list2}, {1, 0} ][[ 1, i, 3]] ]
{{1, 2, 3}, {1, 3, -2}, {2, 5, -1}}
answered Nov 22 at 14:53
gwr
7,35122457
add a comment |
up vote
3
down vote
Another solution:
list1 // ReplacePart[ {i_, 3} :> Differences[ {list1, list2}, {1, 0} ][[ 1, i, 3]] ]
{{1, 2, 3}, {1, 3, -2}, {2, 5, -1}}
answered Nov 22 at 14:53
gwr
7,35122457
add a comment |
up vote
3
down vote
up vote
3
down vote
Another solution:
list1 // ReplacePart[ {i_, 3} :> Differences[ {list1, list2}, {1, 0} ][[ 1, i, 3]] ]
{{1, 2, 3}, {1, 3, -2}, {2, 5, -1}}
answered Nov 22 at 14:53
gwr
7,35122457
Another solution:
list1 // ReplacePart[ {i_, 3} :> Differences[ {list1, list2}, {1, 0} ][[ 1, i, 3]] ]
{{1, 2, 3}, {1, 3, -2}, {2, 5, -1}}
answered Nov 22 at 14:53
gwr
7,35122457
answered Nov 22 at 14:53
gwr
7,35122457
answered Nov 22 at 14:53
gwr
7,35122457
answered Nov 22 at 14:53
gwr
7,35122457
7,35122457
add a comment |
add a comment |
up vote
2
down vote
Try this:
Transpose[
Append[Transpose[list1 ][[1 ;; 2]],
Last[Transpose[list2 ] - Transpose[list1 ]]]]
(* {{1, 2, 3}, {1, 3, -2}, {2, 5, -1}} *)
Have fun!
answered Nov 22 at 14:08
Alexei Boulbitch
21.2k2369
add a comment |
up vote
2
down vote
Try this:
Transpose[
Append[Transpose[list1 ][[1 ;; 2]],
Last[Transpose[list2 ] - Transpose[list1 ]]]]
(* {{1, 2, 3}, {1, 3, -2}, {2, 5, -1}} *)
Have fun!
answered Nov 22 at 14:08
Alexei Boulbitch
21.2k2369
add a comment |
up vote
2
down vote
up vote
2
down vote
Try this:
Transpose[
Append[Transpose[list1 ][[1 ;; 2]],
Last[Transpose[list2 ] - Transpose[list1 ]]]]
(* {{1, 2, 3}, {1, 3, -2}, {2, 5, -1}} *)
Have fun!
answered Nov 22 at 14:08
Alexei Boulbitch
21.2k2369
Try this:
Transpose[
Append[Transpose[list1 ][[1 ;; 2]],
Last[Transpose[list2 ] - Transpose[list1 ]]]]
(* {{1, 2, 3}, {1, 3, -2}, {2, 5, -1}} *)
Have fun!
answered Nov 22 at 14:08
Alexei Boulbitch
21.2k2369
answered Nov 22 at 14:08
Alexei Boulbitch
21.2k2369
answered Nov 22 at 14:08
Alexei Boulbitch
21.2k2369
answered Nov 22 at 14:08
Alexei Boulbitch
21.2k2369
21.2k2369
add a comment |
add a comment |
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