Linked Questions

527
votes
19answers
131k views

Where can I find examples of good Mathematica programming practice?

I consider myself a pretty good Mathematica programmer, but I'm always looking out for ways to either improve my way of doing things in Mathematica, or to see if there's something nifty that I haven't ...
37
votes
4answers
9k views

Sort lists according to the order of another

I have three parallel lists (i.e. the elements in position i of each list are related). I want to sort the first list using the function Sort and make the same ...
30
votes
0answers
524 views

What Mathematica features and idioms have $n^2$ complexity or worse [closed]

Here are a few: AppendTo[data, elem], Sort[data, test], in some cases use of ___ (as ...
10
votes
4answers
5k views

Delete duplicate elements from a list

If a list contains duplicate elements, for example list = {a, 1, 5, 3, 5, x^2, x^2}, how can the duplicate elements be removed? The result would be ...
10
votes
2answers
1k views

DeleteDuplicates[] does not work as expected on floating point values

Here is my simple example, and in this case function DeleteDuplicates does not work as expected. I want to FindRoot of my ...
9
votes
4answers
2k views

Checking for duplicates in sublists

I have a list with contains entries that are length 8 sublists,i.e. L1={{a1,b1,c1,d1,A1,B1,C1,D1},{a2,b2,c2,d2,A2,B2,C2,D2},...} and so on. Now, in my problem two ...
7
votes
2answers
456 views

Finding the two pairs in a list of pairs that minimize and maximize a given function

I need to declare a list of ordered pairs, and with it I need to declare a function of two variables, say x and y, and print ...
6
votes
6answers
459 views

Sort a list of coordinates by frequency from first component of each coordinate

The situation is that I have a List like this: ...
3
votes
2answers
266 views

Exercise using Sort

I have to order the following list according to the sum of the powers of each element of the list, using the function Sort. ...
2
votes
1answer
189 views

list manipulation [duplicate]

I have a list like the following: {{1, 3}, {2, 5}, {3, 6}, {2, 4}} I want the final list to be like that : ...
0
votes
0answers
91 views

How to delete duplicated sublist [duplicate]

I have a list like this: ...