help please why ??
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ahmad qadan
el 28 de Feb. de 2018
Comentada: ahmad qadan
el 28 de Feb. de 2018
A = [ 1 3 2 6 ; 5 7 7 0 ; -2 6 -2 1 ] ;
j = sum(A(1))
j= 1 why ???
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Jim Riggs
el 28 de Feb. de 2018
the statement
sum(A(1))
is summing only the first element in A, which is 1.
If you want to sum the first row, it should be
sum(A(1,:))
and if you want to sum the first column, it is
sum (A(:,1))
3 comentarios
Jim Riggs
el 28 de Feb. de 2018
The matrix A is:
1 3 2 6
5 7 7 0
-2 6 -2 1
The first element in A is A(1) which is 1. So the statement
sum(A(1))
is the same as
sum(1)
and has a value of 1.
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elham kreem
el 28 de Feb. de 2018
WHAT are you want? IF YOU want to sum all the values then use Sum (A) BUt you sum the first element only. IF you help this answer then except to it.
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