How to drop certain elements in certain positions from a list using drop function
3
$begingroup$
a = Table[i, {i, 1, 10}]
Drop[a, {5, 8}]
If go with the above procedure, It will delete all the elements from between position 5 to 8. How to drop elements which are a position 5 and position 8 using drop function.
list-manipulation matrix
asked Nov 29 '18 at 7:22
acousticsacoustics
40819
$endgroup$
add a comment |
3
$begingroup$
a = Table[i, {i, 1, 10}]
Drop[a, {5, 8}]
If go with the above procedure, It will delete all the elements from between position 5 to 8. How to drop elements which are a position 5 and position 8 using drop function.
list-manipulation matrix
asked Nov 29 '18 at 7:22
acousticsacoustics
40819
$endgroup$
add a comment |
3
3
3
$begingroup$
a = Table[i, {i, 1, 10}]
Drop[a, {5, 8}]
If go with the above procedure, It will delete all the elements from between position 5 to 8. How to drop elements which are a position 5 and position 8 using drop function.
list-manipulation matrix
asked Nov 29 '18 at 7:22
acousticsacoustics
40819
$endgroup$
a = Table[i, {i, 1, 10}]
Drop[a, {5, 8}]
If go with the above procedure, It will delete all the elements from between position 5 to 8. How to drop elements which are a position 5 and position 8 using drop function.
list-manipulation matrix
list-manipulation matrix
asked Nov 29 '18 at 7:22
acousticsacoustics
40819
asked Nov 29 '18 at 7:22
acousticsacoustics
40819
asked Nov 29 '18 at 7:22
acousticsacoustics
40819
asked Nov 29 '18 at 7:22
acousticsacoustics
40819
asked Nov 29 '18 at 7:22
acousticsacoustics
40819
40819
add a comment |
add a comment |
2 Answers
2
active
oldest
votes
5
$begingroup$
Use instead Delete, in this way:
a = Table[i, {i, 1, 10}];
Delete[a, {{5}, {8}}]
(*
{1, 2, 3, 4, 6, 7, 9, 10}
*)
By the way, you can be far more efficient:
a = Range[10]
answered Nov 29 '18 at 7:25
David G. StorkDavid G. Stork
23.9k22152
$endgroup$
$begingroup$
can we give the list of position which I wanted to drop like {3,5,8,9}
$endgroup$
– acoustics
Nov 29 '18 at 7:49
2
$begingroup$
Delete[a,{{3},{5},{8},{9}}]
$endgroup$
– David G. Stork
Nov 29 '18 at 7:50
1
$begingroup$
AlsoDelete[a, Partition[{3, 5, 8, 9}, 1]]comes to mind... if the list of positions gets longer.
$endgroup$
– Henrik Schumacher
Nov 29 '18 at 8:04
add a comment |
3
$begingroup$
Drop[a, {5, 8, 3}]
{1, 2, 3, 4, 6, 7, 9, 10}
Fold[Drop[#, {#2}] &, a, Reverse[{5, 8}]]
{1, 2, 3, 4, 6, 7, 9, 10}
answered Nov 29 '18 at 7:35
kglrkglr
178k9198409
$endgroup$
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
5
$begingroup$
Use instead Delete, in this way:
a = Table[i, {i, 1, 10}];
Delete[a, {{5}, {8}}]
(*
{1, 2, 3, 4, 6, 7, 9, 10}
*)
By the way, you can be far more efficient:
a = Range[10]
answered Nov 29 '18 at 7:25
David G. StorkDavid G. Stork
23.9k22152
$endgroup$
$begingroup$
can we give the list of position which I wanted to drop like {3,5,8,9}
$endgroup$
– acoustics
Nov 29 '18 at 7:49
2
$begingroup$
Delete[a,{{3},{5},{8},{9}}]
$endgroup$
– David G. Stork
Nov 29 '18 at 7:50
1
$begingroup$
AlsoDelete[a, Partition[{3, 5, 8, 9}, 1]]comes to mind... if the list of positions gets longer.
$endgroup$
– Henrik Schumacher
Nov 29 '18 at 8:04
add a comment |
5
$begingroup$
Use instead Delete, in this way:
a = Table[i, {i, 1, 10}];
Delete[a, {{5}, {8}}]
(*
{1, 2, 3, 4, 6, 7, 9, 10}
*)
By the way, you can be far more efficient:
a = Range[10]
answered Nov 29 '18 at 7:25
David G. StorkDavid G. Stork
23.9k22152
$endgroup$
$begingroup$
can we give the list of position which I wanted to drop like {3,5,8,9}
$endgroup$
– acoustics
Nov 29 '18 at 7:49
2
$begingroup$
Delete[a,{{3},{5},{8},{9}}]
$endgroup$
– David G. Stork
Nov 29 '18 at 7:50
1
$begingroup$
AlsoDelete[a, Partition[{3, 5, 8, 9}, 1]]comes to mind... if the list of positions gets longer.
$endgroup$
– Henrik Schumacher
Nov 29 '18 at 8:04
add a comment |
5
5
5
$begingroup$
Use instead Delete, in this way:
a = Table[i, {i, 1, 10}];
Delete[a, {{5}, {8}}]
(*
{1, 2, 3, 4, 6, 7, 9, 10}
*)
By the way, you can be far more efficient:
a = Range[10]
answered Nov 29 '18 at 7:25
David G. StorkDavid G. Stork
23.9k22152
$endgroup$
Use instead Delete, in this way:
a = Table[i, {i, 1, 10}];
Delete[a, {{5}, {8}}]
(*
{1, 2, 3, 4, 6, 7, 9, 10}
*)
By the way, you can be far more efficient:
a = Range[10]
answered Nov 29 '18 at 7:25
David G. StorkDavid G. Stork
23.9k22152
answered Nov 29 '18 at 7:25
David G. StorkDavid G. Stork
23.9k22152
answered Nov 29 '18 at 7:25
David G. StorkDavid G. Stork
23.9k22152
answered Nov 29 '18 at 7:25
David G. StorkDavid G. Stork
23.9k22152
23.9k22152
$begingroup$
can we give the list of position which I wanted to drop like {3,5,8,9}
$endgroup$
– acoustics
Nov 29 '18 at 7:49
2
$begingroup$
Delete[a,{{3},{5},{8},{9}}]
$endgroup$
– David G. Stork
Nov 29 '18 at 7:50
1
$begingroup$
AlsoDelete[a, Partition[{3, 5, 8, 9}, 1]]comes to mind... if the list of positions gets longer.
$endgroup$
– Henrik Schumacher
Nov 29 '18 at 8:04
add a comment |
$begingroup$
can we give the list of position which I wanted to drop like {3,5,8,9}
$endgroup$
– acoustics
Nov 29 '18 at 7:49
2
$begingroup$
Delete[a,{{3},{5},{8},{9}}]
$endgroup$
– David G. Stork
Nov 29 '18 at 7:50
1
$begingroup$
AlsoDelete[a, Partition[{3, 5, 8, 9}, 1]]comes to mind... if the list of positions gets longer.
$endgroup$
– Henrik Schumacher
Nov 29 '18 at 8:04
$begingroup$
can we give the list of position which I wanted to drop like {3,5,8,9}
$endgroup$
– acoustics
Nov 29 '18 at 7:49
$begingroup$
can we give the list of position which I wanted to drop like {3,5,8,9}
$endgroup$
– acoustics
Nov 29 '18 at 7:49
2
2
$begingroup$
Delete[a,{{3},{5},{8},{9}}]$endgroup$
– David G. Stork
Nov 29 '18 at 7:50
$begingroup$
Delete[a,{{3},{5},{8},{9}}]$endgroup$
– David G. Stork
Nov 29 '18 at 7:50
1
1
$begingroup$
Also
Delete[a, Partition[{3, 5, 8, 9}, 1]] comes to mind... if the list of positions gets longer.$endgroup$
– Henrik Schumacher
Nov 29 '18 at 8:04
$begingroup$
Also
Delete[a, Partition[{3, 5, 8, 9}, 1]] comes to mind... if the list of positions gets longer.$endgroup$
– Henrik Schumacher
Nov 29 '18 at 8:04
add a comment |
3
$begingroup$
Drop[a, {5, 8, 3}]
{1, 2, 3, 4, 6, 7, 9, 10}
Fold[Drop[#, {#2}] &, a, Reverse[{5, 8}]]
{1, 2, 3, 4, 6, 7, 9, 10}
answered Nov 29 '18 at 7:35
kglrkglr
178k9198409
$endgroup$
add a comment |
3
$begingroup$
Drop[a, {5, 8, 3}]
{1, 2, 3, 4, 6, 7, 9, 10}
Fold[Drop[#, {#2}] &, a, Reverse[{5, 8}]]
{1, 2, 3, 4, 6, 7, 9, 10}
answered Nov 29 '18 at 7:35
kglrkglr
178k9198409
$endgroup$
add a comment |
3
3
3
$begingroup$
Drop[a, {5, 8, 3}]
{1, 2, 3, 4, 6, 7, 9, 10}
Fold[Drop[#, {#2}] &, a, Reverse[{5, 8}]]
{1, 2, 3, 4, 6, 7, 9, 10}
answered Nov 29 '18 at 7:35
kglrkglr
178k9198409
$endgroup$
Drop[a, {5, 8, 3}]
{1, 2, 3, 4, 6, 7, 9, 10}
Fold[Drop[#, {#2}] &, a, Reverse[{5, 8}]]
{1, 2, 3, 4, 6, 7, 9, 10}
answered Nov 29 '18 at 7:35
kglrkglr
178k9198409
edited Nov 29 '18 at 7:49
answered Nov 29 '18 at 7:35
kglrkglr
178k9198409
answered Nov 29 '18 at 7:35
kglrkglr
178k9198409
answered Nov 29 '18 at 7:35
kglrkglr
178k9198409
178k9198409
add a comment |
add a comment |
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