how to sum all elements of one vector?

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

Answer 1

[KL]

D = sum(C); 
div = C./D; %./ meaning element-wise division

https://www.mathworks.com/help/matlab/examples/basic-matrix-operations.html

[Jan]

@fathi: When you want to create a "sum", it is a good point to start from to search in the documentation:

docsearch sum

[fathi]

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]

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