Tagged Questions
4
votes
1answer
115 views
Sorting a matrix alphanumerically
Somewhat related to Sort matrix by columns and rows without changing them, but more general.
I'd like to sort a square matrix (a 3 by 3 in my case, but surely the general solution will treat any), ...
7
votes
1answer
73 views
Ordering function with recognition of duplicates
Fairly often I have a need to get the Ordering of an expression but with recognition of duplicates. For example:
...
8
votes
1answer
237 views
How can I collect data for visualization of quick sort?
I know how to implement quick sort in Mathematica. But I don't know how to get the temp data for visualization, because I used recursion. I want the effect like this.
...
2
votes
2answers
139 views
Position function not always retuning an answer even with no apparent problems
I'm having some problems with Position.
Sometimes it will give an empty list instead of the actual position of the element I am looking for when that element is ...
4
votes
6answers
185 views
Sorting Matrix elements
I have matrix in as shown, consisting of real numbers and 0. How can I sort it to become out as shown?
...
9
votes
1answer
95 views
Ranking Function Allowing for Ties
I have a list that I need to be able to assign ranks to individual elements in, giving it a number related to its position if the list were to be sorted, allowing for ties. For example, ...
4
votes
4answers
184 views
How to pick out the element in a list of lists which satisfies a particular condition?
I have got a list:
...
6
votes
2answers
203 views
Merging different size, different order table
I'm a beginner in Mathematica, so this may be a simple request. I have generated some columns of names and data. I want to merge them into a single list of names, with a column for each attribute.
...
3
votes
2answers
160 views
18
votes
11answers
640 views
Generating an ordered list of pairs of elements from ordered lists
I have a pair of ordered lists. I want to generate a new ordered list (using the same ordering) of length n by applying a binary operator to pairs of elements, one from each list, along with the index ...
11
votes
2answers
313 views
Sorting a list with secondary criterion
Is there an easy way to sort a list on multiple levels of criteria?
By this I mean, first the list should be sorted according by criteria A (the same as using the usual sort function, ...
16
votes
4answers
529 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 changes to the other lists so that I ...
4
votes
1answer
114 views
Sorting a list and finding an array of indices that sorts the list
How can I sort a list and also get a list of indices that sort this list?
For example:
primary list is a
a={1,4,6,7,0,2};
sorted list is b
...
12
votes
2answers
770 views
Simple algorithm to find cycles in edge list
I have the edge list of an undirected graph which consists of disjoint "cycles" only. Example:
{{1, 2}, {2, 3}, {3, 4}, {4, 1}, {5, 6}, {6, 7}, {7, 5}}
Each ...
7
votes
5answers
748 views
How to find rows that have maximum value?
Suppose if I have following list
{
{10,b,30},
{100,a,40},
{1000,b,10},
{1000,b,70},
{100,b,20},
{10,b,70}
}
How to find rows that have max value in ...
7
votes
2answers
178 views
How to generate Intervals from a given list?
If I have a list
list={3,7,4,5,1}
how to get the List of Intervals /Ranges
result = {{1,3},{3,4},{4,5},{5,7}}
