how to sum all elements of one vector?

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fathi
fathi 2017-10-10
编辑： Jan 2017-10-10
hi every one ; how to sum elements of one vector ; Ex: if C =[ 2;3;4;5] .. D = the summation of all elements in C , D = 14. So how can i get D??... by the way how can i divide each element from C over D .. so C will be = [0.1428 ;0.2142; 0.2857; 0.3571] . thanks

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回答（1 个）

KL
KL 2017-10-10
编辑：KL 2017-10-10
D = sum(C);
div = C./D; %./ meaning element-wise division
https://www.mathworks.com/help/matlab/examples/basic-matrix-operations.html
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fathi
fathi 2017-10-10
thanks, mr KL, but the summation of C supposes to be 14 . just one number. if I use D = sum(C); D= 0.6196 0.8000 0.6706 0.5765.
Jan
Jan 2017-10-10
编辑：Jan 2017-10-10
Then you must have redefined the function "sum" by a variable. Try this again:
clear sum
C = [2;3;4;5]
D = sum(C)
E = C ./ D

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