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POfinding diagonal numbers
 

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  1. POfinding diagonal numbers
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    <p>So I have this array here:</p> <pre><code>t = [[8,2,22,97,38,15,0,40,0,75,4,5,7,78,52,12,50,77,91,8], [49,49,99,40,17,81,18,57,60,87,17,40,98,43,69,48,4,56,62,0], [81,49,31,73,55,79,14,29,93,71,40,67,53,88,30,3,49,13,36,65], [52,70,95,23,4,60,11,42,69,24,68,56,1,32,56,71,37,2,36,91], [22,31,16,71,51,67,63,89,41,92,36,54,22,40,40,28,66,33,13,80], [24,47,32,60,99,3,45,2,44,75,33,53,78,36,84,20,35,17,12,50], [32,98,81,28,64,23,67,10,26,38,40,67,59,54,70,66,18,38,64,70], [67,26,20,68,2,62,12,20,95,63,94,39,63,8,40,91,66,49,94,21], [24,55,58,5,66,73,99,26,97,17,78,78,96,83,14,88,34,89,63,72], [21,36,23,9,75,0,76,44,20,45,35,14,0,61,33,97,34,31,33,95], [78,17,53,28,22,75,31,67,15,94,3,80,4,62,16,14,9,53,56,92], [16,39,5,42,96,35,31,47,55,58,88,24,0,17,54,24,36,29,85,57], [86,56,0,48,35,71,89,7,5,44,44,37,44,60,21,58,51,54,17,58], [19,80,81,68,5,94,47,69,28,73,92,13,86,52,17,77,4,89,55,40], [4,52,8,83,97,35,99,16,7,97,57,32,16,26,26,79,33,27,98,66], [88,36,68,87,57,62,20,72,3,46,33,67,46,55,12,32,63,93,53,69], [4,42,16,73,38,25,39,11,24,94,72,18,8,46,29,32,40,62,76,36], [20,69,36,41,72,30,23,88,34,62,99,69,82,67,59,85,74,4,36,16], [20,73,35,29,78,31,90,1,74,31,49,71,48,86,81,16,23,57,5,54], [1,70,54,71,83,51,54,69,16,92,33,48,61,43,52,1,89,19,67,48]] </code></pre> <p>It's just a 2D list, what I need to do is find the four numbers diagonal to a number in any way.</p> <p>I am getting the number using an xy co-ordinate and then getting the numbers around it, I thought this would be easy. </p> <p>What I try to do is get the number and then find the 3 other numbers, I do this four times, for each direction</p> <p>Here's the code I did to try and get it to work but it doesn't want to come out with correct numbers. </p> <pre><code>def getD(t,x,y): z = [[0,0,0,0],[0,0,0,0],[0,0,0,0],[0,0,0,0]] xm = 1 ym = 1 for a in range(0,4): if a == 0: xm = 1 ym = 1 elif a == 1: xm = 1 ym = -1 elif a == 2: xm = -1 ym = 1 elif a == 3: xm = -1 ym = -1 for b in range(0,4): z[a][b]=t[y+(b*ym)][x+(b+xm)] print z </code></pre> <p><code>ym</code> and <code>xm</code> is the direction that we want to move, so if <code>xm</code> is -1, go left, if 1 then go right, if <code>ym</code> is -1 then go down, else go up.</p> <p>Anyone have any way of doing this?</p> <p>If I do <code>getD(t, 0, 0)</code> then I get back <code>[[2, 99, 73, 4], [2, 54, 29, 72], [8, 49, 49, 95], [8, 1, 73, 36]]</code></p> <p>How would I emit ones that aren't valid? For example for when it is <code>getD(t,0,0)</code> and I only want the diagonal which is down and to the right because the others cant be right?</p> <hr> <p>Heres a formatted version of the array</p> <pre><code>08 02 22 97 38 15 00 40 00 75 04 05 07 78 52 12 50 77 91 08 49 49 99 40 17 81 18 57 60 87 17 40 98 43 69 48 04 56 62 00 81 49 31 73 55 79 14 29 93 71 40 67 53 88 30 03 49 13 36 65 52 70 95 23 04 60 11 42 69 24 68 56 01 32 56 71 37 02 36 91 22 31 16 71 51 67 63 89 41 92 36 54 22 40 40 28 66 33 13 80 24 47 32 60 99 03 45 02 44 75 33 53 78 36 84 20 35 17 12 50 32 98 81 28 64 23 67 10 26 38 40 67 59 54 70 66 18 38 64 70 67 26 20 68 02 62 12 20 95 63 94 39 63 08 40 91 66 49 94 21 24 55 58 05 66 73 99 26 97 17 78 78 96 83 14 88 34 89 63 72 21 36 23 09 75 00 76 44 20 45 35 14 00 61 33 97 34 31 33 95 78 17 53 28 22 75 31 67 15 94 03 80 04 62 16 14 09 53 56 92 16 39 05 42 96 35 31 47 55 58 88 24 00 17 54 24 36 29 85 57 86 56 00 48 35 71 89 07 05 44 44 37 44 60 21 58 51 54 17 58 19 80 81 68 05 94 47 69 28 73 92 13 86 52 17 77 04 89 55 40 04 52 08 83 97 35 99 16 07 97 57 32 16 26 26 79 33 27 98 66 88 36 68 87 57 62 20 72 03 46 33 67 46 55 12 32 63 93 53 69 04 42 16 73 38 25 39 11 24 94 72 18 08 46 29 32 40 62 76 36 20 69 36 41 72 30 23 88 34 62 99 69 82 67 59 85 74 04 36 16 20 73 35 29 78 31 90 01 74 31 49 71 48 86 81 16 23 57 05 54 01 70 54 71 83 51 54 69 16 92 33 48 61 43 52 01 89 19 67 48 </code></pre> <p>Say I wanted all the diagonals at <code>(0,0)</code> [the top corner] using <code>getD(t,0,0)</code></p> <p>Using the code above I would want something back along the lines of:</p> <pre><code>[[0, 0, 0, 0], [8, 49, 31, 23], [0, 0, 0, 0], [0, 0, 0, 0]] </code></pre> <p>or if I wanted to get diagonals at point <code>(19,19)</code> [the last bottom corner] using <code>getD(t, 19, 19)</code></p> <p>Using the code above I would want something back along the lines of:</p> <pre><code>[[0, 0, 0, 0], [0, 0, 0, 0], [0, 0, 0, 0], [48, 5, 4, 40]] </code></pre>
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    1. USiCodez
    1. USFabianCook
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    1. COPlease include an example with the results you expect to see. I'm having issues following what you want to get back.
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      1. USJerseyMike
    2. COInclude a link to the problem you're talking about, or write it down for us.
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      1. USJochen Ritzel
    3. COThere we go. I tried to explain, must not have said it clearly enough sorry.
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      1. USFabianCook
 

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