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 Author Comment/Response GeorgeL 06/03/13 11:45am I run the following bits of code into mathematica and it doesn't behave as I expect it to. The following bit of code starts with a 5x5 table which I call x and creates another, y, which will depend on x. I also create a 16x1 table where each entry is 9000, which I will need later. This bit of code runs exactly as expected. >>> x >>> {{131, 201, 630, 537, 805}, {673, 96, 803, 699, 732}, {234, 342, 746, 497, 524}, {103, 965, 422, 121, 37}, {18, 150, 111, 956, 331}} >>> y = Table[0, {i = 5}, {j = 5}] >>> For[i = 1, i < 6, i++, y[[i, 1]] = Sum[x[[j, 1]], {j, 1, i}] ] >>> For[i = 1, i < 6, i++, y[[1, i]] = Sum[x[[1, j]], {j, 1, i}] ] >>> z = Table[9000, {i = 16}, {j = 1}] The following I do not understand: I run For[w = 2, w < 6, w++, For[i = 2, i < 6, i++, For[j = 1, j < i + 1, j++, {z[[((w - 2)*4) + i - 1]], y[[i, w]]} = {Append[ z[[((w - 2)*4) + i - 1]], (y[[j, w - 1]] + Sum[x[[k, w]], {k, j, i}])], Min[z[[((w - 2)*4) + i - 1]]]}]] The code runs fine but and I get exactly what I want for z. However the Min function appears to take the minimum of the old list and not appended list. I find this strange as the following code, where initially p = {1} and q = 1, >>> For[i = 1, i < 3, i++, {p, q} = {p = Append[p, -i], q = Min[p]}] returns q=-2 which suggests it has taken the minimum after it has appended the lsat element. Any help would be greatly appreciated. Thanks URL: ,

 Subject (listing for 'variables and for loops') Author Date Posted variables and for loops GeorgeL 06/03/13 11:45am Re: variables and for loops Bill Simpson 06/03/13 4:19pm Re: Re: variables and for loops GeorgeL 06/04/13 5:29pm
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