added 10 characters in body; edited title

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edited Dec 1, 2023 at 18:54

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How to efficiently Append a result of an operation on each element of a list to itself?

I'm looking for the best function to apply the product of the last two elements of sublist elements to each element:

Example:

(*Input:*)
 {{x1, y1, z1}, {x2, y2, z2}, ...}  

(*Desired output:*)

{{x1, y1, z1, y1 z1}, {x2, y2, z2, y2 z2}, ...}

I know I could just use a Do loop with an index k and do it element by element with AppendTo, but I guess there is a faster method.

How to efficiently Append a result of an operation on each element of a list to itself

I'm looking for the best function to apply the product of the last two elements of sublist elements to each element:

Example:

(*Input:*)
 {{x1, y1, z1}, {x2, y2, z2}, ...}  

(*Desired output:*)

{{x1, y1, z1, y1 z1}, {x2, y2, z2, y2 z2}, ...}

I know I could just use a Do loop with an index k and do it element by element with AppendTo, but I guess there is a faster method.

How to efficiently Append a result of an operation on each element of a list to itself?

I'm looking for the best function to apply the product of the last two elements of sublist elements to each element:

Example:

(*Input:*)
 {{x1, y1, z1}, {x2, y2, z2}, ...}  

(*Desired output:*)

{{x1, y1, z1, y1 z1}, {x2, y2, z2, y2 z2}, ...}

I know I could just use a Do loop with an index k and do it element by element with AppendTo, but I guess there is a faster method.

Commonmark migration

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edited Jun 16, 2020 at 9:23

Community Bot

1

I'm looking for the best function to apply the product of the last two elements of sublist elements to each element:

###Example:

Example:

(*Input:*)
 {{x1, y1, z1}, {x2, y2, z2}, ...}  

(*Desired output:*)

{{x1, y1, z1, y1 z1}, {x2, y2, z2, y2 z2}, ...}

I know I could just use a Do loop with an index k and do it element by element with AppendTo, but I guess there is a faster method.

I'm looking for the best function to apply the product of the last two elements of sublist elements to each element:

###Example:

(*Input:*)
 {{x1, y1, z1}, {x2, y2, z2}, ...}  

(*Desired output:*)

{{x1, y1, z1, y1 z1}, {x2, y2, z2, y2 z2}, ...}

I know I could just use a Do loop with an index k and do it element by element with AppendTo, but I guess there is a faster method.

I'm looking for the best function to apply the product of the last two elements of sublist elements to each element:

Example:

(*Input:*)
 {{x1, y1, z1}, {x2, y2, z2}, ...}  

(*Desired output:*)

{{x1, y1, z1, y1 z1}, {x2, y2, z2, y2 z2}, ...}

I know I could just use a Do loop with an index k and do it element by element with AppendTo, but I guess there is a faster method.

I gave myself freedom to change the code so it is now readable. Variable names does not matter.

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edited Mar 7, 2014 at 9:29

Kuba

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I'm looking for the best function to apply the product of the last two elements of sublist elements to each element:

###Example:

(*INPUT*Input:*)
 {{ExperimentCode1x1, No of Experiments1y1, 
  Volume Used1z1}, {ExperimentCode2x2, No of Experiments2y2, Volume Used2z2}, ...}  

(*OUTPUT:*)
 {{ExperimentCode1, No of Experiments1,
   Volume Used1, (No of Exp1 * Vol Used1)}, {ExperimentCode, 
    No of Experiments, Volume Used, (No of Exp2*Desired output:* Vol Used2)} ...}

{{x1, y1, z1, y1 z1}, {x2, y2, z2, y2 z2}, ...}

I know I could just use a Do loop with an index k and do it element by element with 'AppendTo'AppendTo, but I guess there is a faster method.

I'm looking for the best function to apply the product of the last two elements of sublist elements to each element:

###Example:

(*INPUT:*)
 {{ExperimentCode1, No of Experiments1, 
  Volume Used1}, {ExperimentCode2, No of Experiments2, Volume Used2} ...}  

(*OUTPUT:*)
 {{ExperimentCode1, No of Experiments1,
   Volume Used1, (No of Exp1 * Vol Used1)}, {ExperimentCode, 
    No of Experiments, Volume Used, (No of Exp2 * Vol Used2)} ...}

I know I could just use a Do loop with an index k and do it element by element with 'AppendTo', but I guess there is a faster method.

I'm looking for the best function to apply the product of the last two elements of sublist elements to each element:

###Example:

(*Input:*)
 {{x1, y1, z1}, {x2, y2, z2}, ...}  

(*Desired output:*)

{{x1, y1, z1, y1 z1}, {x2, y2, z2, y2 z2}, ...}

I know I could just use a Do loop with an index k and do it element by element with AppendTo, but I guess there is a faster method.

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occurred Mar 7, 2012 at 12:03

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edited Mar 7, 2012 at 11:10

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added 41 characters in body; edited tags; edited title

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edited Mar 7, 2012 at 11:05

rm -rf ♦

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edited body

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edited Mar 7, 2012 at 8:50

PeriodicProgrammer

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asked Mar 7, 2012 at 8:45

PeriodicProgrammer

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How to efficiently Append a result of an operation on each element of a list to itself?

How to efficiently Append a result of an operation on each element of a list to itself?

Example:

How to efficiently Append a result of an operation on each element of a list to itself

Example:

How to efficiently Append a result of an operation on each element of a list to itself?

Example:

Example:

Example: