For loop help!
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I need helpt with a for loop to pick numbers from a vector and put them in an existing non square in the order shown in the figure below (hop it makes sense). It starts at the dot and then follow the arrow. the resulting matrix should be as the one in the blackbackgrownd figure.
Sorry if this has been asked before <3 .
Thank you.
6 个评论
James Tursa
2020-11-18
Is this just for the specific problem you show (in which case you can simply use explicit indexing since the problem is small enough)? Or is there really a bigger problem you are trying to solve?
BiaoZhun
2020-11-18
James Tursa
2020-11-18
Well, you don't necessarily need a for-loop. We just need to know the explicit indexing rule for your large vector.
BiaoZhun
2020-11-18
James Tursa
2020-11-18
Start with 3 and increment by 3's, then start with 2 and increment by 3's, then start with 1 and increment by 3's?
BiaoZhun
2020-11-18
回答（1 个）
"... so becase of the amount of data i need a for loop"
I doubt that using a loop would be a good approach.
V = 1:12;
R = 3;
M = flipud(reshape(V,R,[]))
Your larger vector:
V = rand(118668,1);
R = 9889;
M = flipud(reshape(V,R,[]));
size(M)
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