Linked Questions

178
votes
3answers
39k views

Alternatives to procedural loops and iterating over lists in Mathematica

While there are some cases where a For loop might be reasonable, it's a general mantra – one I subscribe to myself – that "if you are using a ...
73
votes
4answers
5k views

Using a PatternTest versus a Condition for pattern matching

My last question to the site resulted in several answers that involve using pattern matching in Mathematica, a feature I wasn't very familiar with at the time. I am currently reading Mathematica ...
34
votes
5answers
3k views

Are there “All” and “Any” functions in Mathematica?

In Python, there is a function all which returns true if all of its arguments are true, and any which returns true if at least ...
42
votes
4answers
8k views

Fastest way to calculate matrix of pairwise distances

It is a very common problem that given a distance function $d(p_1,p_2)$ and a set of points pts, we need to construct a matrix ...
8
votes
4answers
1k views

How to draw a hanging rootogram in Mathematica?

I am trying to plot a hanging rootogram of some data in Mathematica. I can't seem to find a built in function for it, while simply using Histogram (on "transformed" ...
6
votes
3answers
3k views

Efficient way to test if all the elements in a list are Integers? [closed]

Consider a list such as s = {1, 2, 3, 3, 5, 6, 3} With IntegerQ[number] , you know if ...
6
votes
5answers
416 views

Check whether array has only constant entries?

I have an array arr with n entries. Now I want to check whether ...
9
votes
3answers
552 views

Generalization to AllTrue, AnyTrue and NoneTrue

I am wondering if there is a natural Mathematica way to generalize those functions. To be specific, All three functions AllTrue, ...
3
votes
3answers
572 views

Selecting sublists of different length if at least one element of the sublist fulfills a criterion

I have the following list, containing sublists with 1,2 or 3 elements. ...
1
vote
2answers
159 views

List manipulation - End loop

Given are two matrices (a & b). I want to end the For-loop if all values in the matrix (a minus b) are smaller than 7, in contrast to any value in the matrix (a minus b) is smaller than 7. Can ...
2
votes
1answer
89 views

Type declaration for list arguments

How can I make f[n_Integer]=2*n valid for a list of integers? For example: f[nlist_Integer] := 2*nlist[[1]] does not work ...
2
votes
2answers
147 views

How to use Contains functions on matrices?

I need a quick test to check if a large matrix contains any non-zeros. The Contains functions work on Lists not matrices. ...