Problem 944. Create incremental spiral WITHOUT USING EVAL or FEVAL

J-G van der Toorn

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Constructions that use feval or eval are used to cheat with cody. This test-suite tries to avoid that trick.
The goal of this challenge is to create a numeric pyramid with size n*n, starting with 1 in the upper left corner, and cycling clockwise until the center, by every step incrementing with one. It is not allowed to use eval or feval statements to get a lower node-count. Neither are regexp, regexprep, regexpi, eval, evalc, evalin, nor inline allowed.
For example:
n = 3;
ans =
     1     2     3
     8     9     4
     7     6     5
n = 6;
ans =
     1     2     3     4     5     6
    20    21    22    23    24     7
    19    32    33    34    25     8
    18    31    36    35    26     9
    17    30    29    28    27    10
    16    15    14    13    12    11

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111 Solutions

43 Solvers

Last Solution submitted on Dec 02, 2025

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Andrew Newell on 25 Apr 2014

I can't get it to read my solution (which passes the test when I try it on my own computer).

Jan Orwat on 18 Sep 2014

Same problem.

rifat on 19 Sep 2014

I also had the same problem

Dyuman Joshi on 1 Sep 2021

The test suite has been updated to check for restricted functions with new test cases being added as well.

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