CAS: add List ? (ggb5/ggb6)

hawe shared this problem 5 years ago

New

can not add List b (Line12): have to split in 2 lines (13,14) to calculate

12: Transpose(L)*Y - b 
> ?
13:Transpose(L)*Y
>{(4 * y1) - (2 * y2) - (5 * y3), (6 * y2) + (2 * y3), (4 * y3)}
14: $13 - b
>{(4 * y1) - (2 * y2) - (5 * y3) - 3, (6 * y2) + (2 * y3) - 5, (4 * y3) + 7}

hawe

BTW: next app update to ipad?

is there a place to read about the changes in a new version?

The same problem

Comments (2)

hawe ● 5 years ago

I can reduce the problem by using Transpose

using function Transpose in a matrix/list product you can not add a vector

b = {15, 79, 189}

L = {{3, 0, 0}, {-5, 4, 0}, {1, 7, 1}}

OK: (Transpose(L) * {x1,x2,x3})

??: (Transpose(L) * {x1,x2,x3}) - b

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mathmagic ● 5 years ago

I think there is a problem with the format shown for (Transpose(L) * {x1,x2,x3})

it is shown like a simple list not matrix but it must be a matrix

you can try flatten((Transpose(L) * {x1,x2,x3}))-b

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