Tagged Questions

0
votes
0answers
20 views

Closed and open Sequential Pattern Mining Algorithms

I want to use some algorithms to mine my log data. I found a pattern mining framework on: http://www.philippe-fournier-viger.com/spmf/index.php?link=algorithms.php I have tried several algorithms, ...
2
votes
2answers
56 views

Finding formula for the nth partial sum

A few days ago, I asked for some clarification about pattern recognition and the n-th partial sum for infinite series. Although the explanation given was top-notch (thanks again), I'm still having ...
1
vote
1answer
40 views

Understanding the fundamentals of pattern recognition

I'm learning now about sequences and series: patterns in short. This is part of my Calc II class. I'm finding I'm having difficulty in detecting all of the patterns that my text book is asking me to ...
-1
votes
2answers
76 views

Guess the terms in the sequence?

I am writing GRE in 2 two months, and I just can't solve these sequence question. Can anyone tell what the missing terms are and what is the pattern here? Find the next 4 terms in this sneaky ...
-11
votes
1answer
2k views

What is the logical pattern in these pictures? [closed]

What is the pattern/logic in these two (separate) logical/pattern recognition tasks? I could not find it, it may be hard. Which symbols should replace the question marks? Edit: What is the logic ...
3
votes
0answers
126 views

Pattern puzzle help

I've spent hours on this puzzle, which shouldn't be too hard, and I'm sure I've got the right answer, but apparently it's wrong. The problem statement: You are guessing a positive number X. You ...
1
vote
2answers
304 views

How to find the pattern?

I'm challenging myself to figure out the mathematical expression of the number of possible combinations for certain parameters, and frankly I have no idea how. The rules are these: Take numbers ...
35
votes
19answers
5k views

Getting the sequence $1, 0, -1, 0, 1, 0, -1, 0, \ldots$ without trig?

What's the simplest way to write a function that outputs the sequence: 1, 0, -1, 0, 1, 0, -1, 0, ... ... without using any trig functions? I was able to come up ...
3
votes
3answers
264 views

Notation for factorial-type pattern with a skip/step of two instead of one?

I came across a peculiar pattern when solving a recurrence relation today: Some sequence $a_n$ looks as such: $a_0 = 1$ $a_2 = \frac{1}{2 \cdot 1}$ $a_4 = \frac{1}{4 \cdot 2 \cdot 1}$ $a_6 = ...
1
vote
2answers
130 views

Trying to figure out the pattern in this series (2)

I could use some help figuring out what the next row is in the pattern below (and what the rule is generally for each number in the series). I put it in a triangle because I'm pretty sure it has ...
0
votes
1answer
103 views

Trying to figure out the pattern in this series

I'm trying to figure out the rule that's producing the series below. The first column is the factorials $1!,2!,3!,4!,5!,6!$ But I can't figure out what else is going on. So I know the next row will ...
7
votes
3answers
631 views

How to find pattern in $1,2,8,9,15,20,26,38…$ infinite sequence?

While I was investigating some specific types of prime numbers I have faced with the following infinite sequence : $1,2,8,9,15,20,26,38,45,65,112,244,303,393,560,....$ I tried to find recursive ...
1
vote
3answers
185 views

Patterns in Sequences

I've heard in a movie that for any sequence of numbers, there is a nice formula for generating that sequence. So, for example if I write: 1,2,1,2,3,3,1,2,3,1,2,4,... There is a formula for ...