Subtracting the last elements in each raw in two lists

up vote
5
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}}

edited 10 hours ago

kglr

172k8194399

asked 13 hours ago

monfneg

1286

add a comment |

up vote
5
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}}

edited 10 hours ago

kglr

172k8194399

asked 13 hours ago

monfneg

1286

add a comment |

up vote
5
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}}

edited 10 hours ago

kglr

172k8194399

asked 13 hours ago

monfneg

1286

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 10 hours ago

kglr

172k8194399

asked 13 hours ago

monfneg

1286

edited 10 hours ago

kglr

172k8194399

asked 13 hours ago

monfneg

1286

edited 10 hours ago

kglr

172k8194399

edited 10 hours ago

kglr

172k8194399

edited 10 hours ago

kglr

172k8194399

asked 13 hours ago

monfneg

1286

asked 13 hours ago

monfneg

1286

asked 13 hours ago

monfneg

1286

add a comment |

3 Answers
3

active

oldest

votes

up vote
6
down vote

accepted

diff = list1;

diff[[All, -1]] = Subtract[list2[[All, -1]], list1[[All, -1]]];

diff

answered 13 hours ago

kglr

172k8194399

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 13 hours ago

Alexei Boulbitch

21.1k2369

add a comment |

up vote
2
down vote

Another solution:

list1 // ReplacePart[ {i_, 3} :> Differences[ {list1, list2}, {1, 0} ][[ 1, i, 3]] ]

answered 12 hours ago

gwr

7,04622457

add a comment |

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3 Answers
3

active

oldest

votes

3 Answers
3

active

oldest

votes

up vote
6
down vote

accepted

diff = list1;

diff[[All, -1]] = Subtract[list2[[All, -1]], list1[[All, -1]]];

diff

answered 13 hours ago

kglr

172k8194399

add a comment |

up vote
6
down vote

accepted

diff = list1;

diff[[All, -1]] = Subtract[list2[[All, -1]], list1[[All, -1]]];

diff

answered 13 hours ago

kglr

172k8194399

add a comment |

up vote
6
down vote

accepted

diff = list1;

diff[[All, -1]] = Subtract[list2[[All, -1]], list1[[All, -1]]];

diff

answered 13 hours ago

kglr

172k8194399

diff = list1;

diff[[All, -1]] = Subtract[list2[[All, -1]], list1[[All, -1]]];

diff

answered 13 hours ago

kglr

172k8194399

answered 13 hours ago

kglr

172k8194399

answered 13 hours ago

kglr

172k8194399

answered 13 hours ago

kglr

172k8194399

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 13 hours ago

Alexei Boulbitch

21.1k2369

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 13 hours ago

Alexei Boulbitch

21.1k2369

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 13 hours ago

Alexei Boulbitch

21.1k2369

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 13 hours ago

Alexei Boulbitch

21.1k2369

answered 13 hours ago

Alexei Boulbitch

21.1k2369

answered 13 hours ago

Alexei Boulbitch

21.1k2369

answered 13 hours ago

Alexei Boulbitch

21.1k2369

add a comment |

up vote
2
down vote

Another solution:

list1 // ReplacePart[ {i_, 3} :> Differences[ {list1, list2}, {1, 0} ][[ 1, i, 3]] ]

answered 12 hours ago

gwr

7,04622457

add a comment |

up vote
2
down vote

Another solution:

list1 // ReplacePart[ {i_, 3} :> Differences[ {list1, list2}, {1, 0} ][[ 1, i, 3]] ]

answered 12 hours ago

gwr

7,04622457

add a comment |

up vote
2
down vote

Another solution:

list1 // ReplacePart[ {i_, 3} :> Differences[ {list1, list2}, {1, 0} ][[ 1, i, 3]] ]

answered 12 hours ago

gwr

7,04622457

Another solution:

list1 // ReplacePart[ {i_, 3} :> Differences[ {list1, list2}, {1, 0} ][[ 1, i, 3]] ]

answered 12 hours ago

gwr

7,04622457

answered 12 hours ago

gwr

7,04622457

answered 12 hours ago

gwr

7,04622457

answered 12 hours ago

gwr

7,04622457

add a comment |

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