Fibonacci Spiral

Question

Your goal is to generate a Fibonacci spiral with numbers.

Example Input / Output

1 -> 1

2 -> 1 1

3 -> 1 1
     2 2
     2 2

6 -> 8 8 8 8 8 8 8 8 5 5 5 5 5
     8 8 8 8 8 8 8 8 5 5 5 5 5
     8 8 8 8 8 8 8 8 5 5 5 5 5
     8 8 8 8 8 8 8 8 5 5 5 5 5
     8 8 8 8 8 8 8 8 5 5 5 5 5
     8 8 8 8 8 8 8 8 1 1 3 3 3
     8 8 8 8 8 8 8 8 2 2 3 3 3
     8 8 8 8 8 8 8 8 2 2 3 3 3

Input of 9

Input The input can be taken through STDIN or function argument. It will be a single number

Output The output can be from STDOUT or a function's return value. It should be a single string.

Extra whitespace at the very end of the line is not allowed. The output can contain digits, linefeeds (newlines), and spaces.

Orientation does not matter, this means rotations and reflections. As long as it follows a valid Fibonacci spiral pattern.

Numbers with different amounts of digits (e.g. 1 and 13) should be right-aligned with each other. A space may need to be added to the very beginning of a line so everything can line up.

1   1                          1   1
100 100  should actually be  100 100

You can see an example here

---

This is code-golf so shortest code in bytes wins!

Answer 1

APL, 23

{a,⍴⍨2⍴⊃⍴a←⌽⍉⍵}⍣(⎕-1)⍪1

Explanation:

⍪1               this creates a 1x1 matrix containing just 1
{..}⍣(⎕-1)     the power operator (⍣) repeats the function {} user input - 1 times
a,⍴⍨2⍴⊃⍴a←⌽⍉⍵   the function being iterated rotates the matrix and appends the next matrix to it.

Try it on tryapl.org

Answer 2

Matlab, 84 bytes

A function is used. Output is in stdout.

function f(N)
s=0;t=1;y=1;for n=2:N
u=s+t;s=t;t=u;y=[rot90(y) t*ones(t)];end;disp(y)

Examples:

>> f(1)
     1
>> f(2)
     1     1
>> f(3)
     1     2     2
     1     2     2
>> f(6)
     5     5     5     5     5     8     8     8     8     8     8     8     8
     5     5     5     5     5     8     8     8     8     8     8     8     8
     5     5     5     5     5     8     8     8     8     8     8     8     8
     5     5     5     5     5     8     8     8     8     8     8     8     8
     5     5     5     5     5     8     8     8     8     8     8     8     8
     3     3     3     1     1     8     8     8     8     8     8     8     8
     3     3     3     2     2     8     8     8     8     8     8     8     8
     3     3     3     2     2     8     8     8     8     8     8     8     8
>> f(7)
     8     8     8     8     8     8     8     8    13    13    13    13    13    13    13    13    13    13    13    13    13
     8     8     8     8     8     8     8     8    13    13    13    13    13    13    13    13    13    13    13    13    13
     8     8     8     8     8     8     8     8    13    13    13    13    13    13    13    13    13    13    13    13    13
     8     8     8     8     8     8     8     8    13    13    13    13    13    13    13    13    13    13    13    13    13
     8     8     8     8     8     8     8     8    13    13    13    13    13    13    13    13    13    13    13    13    13
     8     8     8     8     8     8     8     8    13    13    13    13    13    13    13    13    13    13    13    13    13
     8     8     8     8     8     8     8     8    13    13    13    13    13    13    13    13    13    13    13    13    13
     8     8     8     8     8     8     8     8    13    13    13    13    13    13    13    13    13    13    13    13    13
     5     5     5     5     5     1     2     2    13    13    13    13    13    13    13    13    13    13    13    13    13
     5     5     5     5     5     1     2     2    13    13    13    13    13    13    13    13    13    13    13    13    13
     5     5     5     5     5     3     3     3    13    13    13    13    13    13    13    13    13    13    13    13    13
     5     5     5     5     5     3     3     3    13    13    13    13    13    13    13    13    13    13    13    13    13
     5     5     5     5     5     3     3     3    13    13    13    13    13    13    13    13    13    13    13    13    13

Matlab, 78 bytes

function y=f(N)
s=0;t=1;y=1;for n=2:N
u=s+t;s=t;t=u;y=[rot90(y) t*ones(t)];end

Same as above except a Matlab's feature is exploited, namely, it automatically displays function output (as a string) in stdout. This avoids the conversion to string in the above approach.

f(6)
ans =
     5     5     5     5     5     8     8     8     8     8     8     8     8
     5     5     5     5     5     8     8     8     8     8     8     8     8
     5     5     5     5     5     8     8     8     8     8     8     8     8
     5     5     5     5     5     8     8     8     8     8     8     8     8
     5     5     5     5     5     8     8     8     8     8     8     8     8
     3     3     3     1     1     8     8     8     8     8     8     8     8
     3     3     3     2     2     8     8     8     8     8     8     8     8
     3     3     3     2     2     8     8     8     8     8     8     8     8

Answer 3

Ruby, 243 242 236 233 222 170 130 bytes

s,l,r=0,1,[]
gets.to_i.times{s+=l
l=s-l
s.times{r<<[s]*s}
r=r.transpose.reverse}
r.map{|w|puts w.map{|c|"%#{s.to_s.size}s"%c}*" "}

Answer 4

Python 2, 121 bytes

a,b=0,1;L=[]
exec"a,b=b,a+b;L=zip(*L[::-1])+[[a]*a]*a;"*input()
for r in L:print" ".join("%*d"%(len(str(a)),x)for x in r)

The relaxed rules on rotations makes this a lot simpler.

I haven't used backticks in place of str(a) here because I'm not sure whether we're allowed more leading spaces than necessary, if we ever reach longs. Although, even if we were, using a itself would be shorter anyway.

Answer 5

Python - 189 179 174

n=int(input())
f=[1,1]
while len(f)<n:f+=[f[-1]+f[-2]]
o=[[]]
for i in f:o=(list(zip(*o)))[::-1]+[[i]*i]*i
for x in o:print(' '.join(str(y).rjust(len(str(f[-1])))for y in x))

Answer 6

Haskell, 183 176 171 163 bytes

import Data.List
s t=map((t>>[l t])++)t
e 1=[[1]];e n=s.reverse.transpose$e$n-1
f=g.e
g m=unlines$map(>>=((show$l m)#).show)m
a#b|l a<l b=b;a#b=a#(' ':b)
l=length

The function is f, which takes a number and returns a single string:

λ: putStr $ f 8
 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21  5  5  5  5  5  8  8  8  8  8  8  8  8
 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21  5  5  5  5  5  8  8  8  8  8  8  8  8
 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21  5  5  5  5  5  8  8  8  8  8  8  8  8
 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21  5  5  5  5  5  8  8  8  8  8  8  8  8
 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21  5  5  5  5  5  8  8  8  8  8  8  8  8
 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21  3  3  3  1  1  8  8  8  8  8  8  8  8
 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21  3  3  3  2  2  8  8  8  8  8  8  8  8
 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21  3  3  3  2  2  8  8  8  8  8  8  8  8
 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 13 13 13 13 13 13 13 13 13 13 13 13 13
 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 13 13 13 13 13 13 13 13 13 13 13 13 13
 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 13 13 13 13 13 13 13 13 13 13 13 13 13
 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 13 13 13 13 13 13 13 13 13 13 13 13 13
 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 13 13 13 13 13 13 13 13 13 13 13 13 13
 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 13 13 13 13 13 13 13 13 13 13 13 13 13
 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 13 13 13 13 13 13 13 13 13 13 13 13 13
 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 13 13 13 13 13 13 13 13 13 13 13 13 13
 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 13 13 13 13 13 13 13 13 13 13 13 13 13
 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 13 13 13 13 13 13 13 13 13 13 13 13 13
 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 13 13 13 13 13 13 13 13 13 13 13 13 13
 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 13 13 13 13 13 13 13 13 13 13 13 13 13
 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 13 13 13 13 13 13 13 13 13 13 13 13 13

Answer 7

J, 36 bytes

1&(($~,~)@(1{$@]),.|:@|.@])&(,.1)@<:

Usage:

   (1&(($~,~)@(1{$@]),.|:@|.@])&(,.1)@<:) 6
8 8 8 8 8 8 8 8 5 5 5 5 5
8 8 8 8 8 8 8 8 5 5 5 5 5
8 8 8 8 8 8 8 8 5 5 5 5 5
8 8 8 8 8 8 8 8 5 5 5 5 5
8 8 8 8 8 8 8 8 5 5 5 5 5
8 8 8 8 8 8 8 8 1 1 3 3 3
8 8 8 8 8 8 8 8 2 2 3 3 3
8 8 8 8 8 8 8 8 2 2 3 3 3

Method:

The function rotates the current square and adds the new square to the current one input-1 times. Square size and element values are gathered from the size of the previous rectangle.

Code explanation:

1&(           loop
    ($~,~)      new square with size and elements
    @(1{$@])    with the size of the second dimension of the current rectangle
    ,.          attached to
    |:@|.@]     rotated current rectangle
)&(,.1)       starting the loop with matrix 1
@<:           looping input-1 times

Try it online here.

Answer 8

Pyth, 34 bytes

jbmsm.[hl`lhZ`k\ d=Zu+_CGmmlGGGQ]]

Surprisingly, more than half of the code is printing/padding, rather than generating the matrix.

The generation of the matrix is really simple however, it consists of a transpose and reversal, and adding N lines containing N copies of N, where N is the current number of lines.

Example output for 7:

  5  5  5  5  5  8  8  8  8  8  8  8  8
  5  5  5  5  5  8  8  8  8  8  8  8  8
  5  5  5  5  5  8  8  8  8  8  8  8  8
  5  5  5  5  5  8  8  8  8  8  8  8  8
  5  5  5  5  5  8  8  8  8  8  8  8  8
  3  3  3  1  1  8  8  8  8  8  8  8  8
  3  3  3  2  2  8  8  8  8  8  8  8  8
  3  3  3  2  2  8  8  8  8  8  8  8  8
 13 13 13 13 13 13 13 13 13 13 13 13 13
 13 13 13 13 13 13 13 13 13 13 13 13 13
 13 13 13 13 13 13 13 13 13 13 13 13 13
 13 13 13 13 13 13 13 13 13 13 13 13 13
 13 13 13 13 13 13 13 13 13 13 13 13 13
 13 13 13 13 13 13 13 13 13 13 13 13 13
 13 13 13 13 13 13 13 13 13 13 13 13 13
 13 13 13 13 13 13 13 13 13 13 13 13 13
 13 13 13 13 13 13 13 13 13 13 13 13 13
 13 13 13 13 13 13 13 13 13 13 13 13 13
 13 13 13 13 13 13 13 13 13 13 13 13 13
 13 13 13 13 13 13 13 13 13 13 13 13 13
 13 13 13 13 13 13 13 13 13 13 13 13 13

Answer 9

Perl, 289 277 257 bytes

@f=(0,1);push@f,$f[-1]+$f[-2]while(@f<=$ARGV[0]);$d=1+length$f[-1];shift@f;map{$v=$f[$_];$t=sprintf("%${d}d",$v)x$v;$_%4||map{unshift@s,$t}1..$v;$_%4==3&&map{$_.=$t}@s;$_%4==2&&map{push@s,$t}1..$v;$_%4==1&&map{$_=$t.$_}@s;}0..$#f;$\=$/;for(@s){s/^ //;print}

Answer 10

K, 48 bytes

{{`0:1_',/'(1+#$|//x)$x}(x-1){+|x,\:t#t:#x}/,,1}

And in action:

  {{`0:1_',/'(1+#$|//x)$x}(x-1){+|x,\:t#t:#x}/,,1}7
 8  8  8  8  8  8  8  8  5  5  5  5  5
 8  8  8  8  8  8  8  8  5  5  5  5  5
 8  8  8  8  8  8  8  8  5  5  5  5  5
 8  8  8  8  8  8  8  8  5  5  5  5  5
 8  8  8  8  8  8  8  8  5  5  5  5  5
 8  8  8  8  8  8  8  8  1  1  3  3  3
 8  8  8  8  8  8  8  8  2  2  3  3  3
 8  8  8  8  8  8  8  8  2  2  3  3  3
13 13 13 13 13 13 13 13 13 13 13 13 13
13 13 13 13 13 13 13 13 13 13 13 13 13
13 13 13 13 13 13 13 13 13 13 13 13 13
13 13 13 13 13 13 13 13 13 13 13 13 13
13 13 13 13 13 13 13 13 13 13 13 13 13
13 13 13 13 13 13 13 13 13 13 13 13 13
13 13 13 13 13 13 13 13 13 13 13 13 13
13 13 13 13 13 13 13 13 13 13 13 13 13
13 13 13 13 13 13 13 13 13 13 13 13 13
13 13 13 13 13 13 13 13 13 13 13 13 13
13 13 13 13 13 13 13 13 13 13 13 13 13
13 13 13 13 13 13 13 13 13 13 13 13 13
13 13 13 13 13 13 13 13 13 13 13 13 13

May still be some good opportunities for golfing.

The program basically consists of two parts- generating the concatenated matrix and formatting it for output. The former is fairly simple:

  {(x-1){+|x,\:t#t:#x}/,,1}5
(3 3 3 2 2
 3 3 3 2 2
 3 3 3 1 1
 5 5 5 5 5
 5 5 5 5 5
 5 5 5 5 5
 5 5 5 5 5
 5 5 5 5 5)

Beginning with a 1x1 matrix containing 1, build a T-length vector of T where T is the length of the starting matrix on the first dimension (t#t:#x) and attach that to each row of the original matrix (x,\:). Reversing and transposing the result (+|) rotates it 90 degrees. We do this N-1 times.

Formatting is pretty clunky, because K's natural approach to printing a matrix won't align number columns the way we need:

{`0:1_',/'(1+#$|//x)$x}

The basic idea is to take the maximum element of the matrix (|//x), convert it to a string (unary $), take its length plus one (1+#) and then format the elements of the matrix to right aligned strings of that size. Then to tidy up, join those strings (,/') and drop the resulting leading space (1_').

Answer 11

CJam, 48 bytes

1saali({z{W%}%_0=,__sa*a*+}*_W=W=,):U;{USe[}f%N*

Try it online

The core part of generating the pattern seems reasonably straightforward. Rotate the rectangle created so far, and add a square of values at the bottom.

The code for padding the result looks awful, though. I tried a bunch of combinations of f and : operators to apply the padding to the nested list, but nothing worked. If anybody has better suggestions, they are most welcome.

1s    First value. Using string for values so that we can pad them in the end.
aa    Wrap it twice. Data on stack will be a list of lists (list of lines).
li    Get input.
(     Decrement, since we seeded the list at n=1.
{     Loop over n.
  z     Transpose...
  {W%}% ... and reverse all lines, resulting in a 90 degree rotation.
  _0=,  Get length of line, which is the size of square we need to add.
  __    Create two copies of size.
  sa    Convert one size to string, and wrap it in array.
  *     Replicate it size times. This is one line.
  a     Wrap the line...
  *     ... and replicate it size times. The square of new values is done.
  +     Add the list of lines to the previous list of lines.
}*    End of loop over n.
_W=W= Get last value produced.
,)    Take its length, and increment it. This is the output field width.
:U;   Store the field width in variable, and pop it. This is ugly.
{     Start of block applied to all values.
  U     Field width stored in variable.
  S     Space.
  e[    Pad left.
}f%   End of block applied to all values.
N*    Join lines with newline.

Answer 12

Pyth, 29 bytes

Vu+C_GmmlGGGQ\]Yjdm.\[l`lN`d\ N

Demonstration.

If padding was free/implicit, like in APL, or matrix output was allowed, this would be 14 bytes:

u+C_GmmlGGGQ]Y

Answer 13

Ruby, 129 bytes

I edited the other ruby answer a bunch, but my most recent change is not being accepted or something, so here it is:

s,r=0,[[1]]
gets.to_i.times{s+=r[0][0]
r=(r+[[s]*s]*s).transpose.reverse}
r.map{|w|puts w.map{|c|"%#{r[0][s].to_s.size}s"%c}*' '}

Answer 14

ES6, 248 bytes

n=>(f=(n,o=n)=>Array(n).fill(o),g=n=>n<3?[f(n,1)]:(a=g(n-2)).reverse().concat(f(l=a[0].length,f(l))).map((e,i,a)=>f(a.length).concat(e.reverse())),a=g(n),s=' '.repeat(l=` ${a[0][0]}`.length),a.map(a=>a.map((e,i)=>(s+e).slice(!i-1)).join``).join`\n`)

Where \n represents a literal newline character.

Annoyingly the formatting takes up a large chunk of the code.

f is a helper function that makes a filled array. It's used mostly to create the filled squares but also handily doubles up to produce the base cases for the recursion.

g is the main gruntwork. It recursively generates the last but one solution, rotates it 180 degrees, then appends the next two squares.