Making an array using loop

A=[2;3;4;5;12;13;14;15;16;17;24;25;26;27;28;29;36;37;38;39;40;41;48;49;50;51;52;53;60;61;62;63;64;65;72;73;74;75;76;77;84;85;86;87;88;89;96;97;98;99;100;101;108;109;110;111;112;113;120;121];

How to make an array like A using loop. Thank you.

[Cris LaPierre]

is there a pattern to the numbers? If not, a for loop isn't going to help you much.

[SWARNENDU PAL]

that is the array. There is a pattern,plz notice carefully. If you provide me any other option that will be also helpful.Thank you.

[Rik]

Help us help you: explain the pattern and we might be able to help you write the code to create it.

The pattern is not obvious to me (nor, apperently, to Cris). It is also missing from the OEIS, which is generally an indication that the sequence is fairly obscure.

Answer 1

[Paul Hoffrichter]

Change ORIGINAL_POST to false to get slightly different result.

clearvars; clc; % remove previous debug runs

lenA = 60; % assumes you know the length of A
A = zeros(lenA,1); % pre-allocate A

maxSeqLen = 6;
ORIGINAL_POST = true;
if ORIGINAL_POST
   start = 2;
   seqLength = 4;
else
%    rng(123);
   start = randi(maxSeqLen,1);
   seqLength = randi(maxSeqLen);
end
nominalSequence = 1:maxSeqLen;
skip = 7;

% Initialize
A(1:seqLength) = start:(start + seqLength - 1);
startLoc = seqLength + 1;

k = seqLength + 1;
while startLoc + maxSeqLen - 1 <= lenA
   start = A(startLoc - 1) + skip;
   A(startLoc:startLoc + maxSeqLen - 1) = start: start + maxSeqLen - 1;
   start = start + maxSeqLen - 1 + skip;
   startLoc = startLoc + maxSeqLen;
end

if startLoc <= lenA
   maxSeqLen = lenA - startLoc + 1;
   A(startLoc:startLoc + maxSeqLen - 1) = start: start + maxSeqLen - 1;
   % if you cannot pre-allocate A, and have to enter values one at a time,
   % then you can add elements like this: A = [A; new-value];
end

[Rik]

You don't print anything to the command window, so what is the clc doing? And why are you suggesting clear all? mlint is clearly warning you not to use this.

[Paul Hoffrichter]

clc - used to remove previous debug runs where printing was done.

clear all - good point. Edited to say clearvars.