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a question of assigning the list elements

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dcydhb dcydhb
dcydhb dcydhb 2018-12-20
回答： madhan ravi 2018-12-20
i just want to assign the
m(0)=1;
m(1)=1;
m(2)=1;
and get the sum of them,but when i assign them,the matlab can't get the answer,and why?
syms s1;
syms m(k);
syms z(k);
m(0)=1;
m(1)=1;
m(2)=1;
s1=symsum(m(k),k,0,2)

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回答（2 个）

KSSV
KSSV 2018-12-20
m = [1 1 1] ;
iwant = sum(m) ;
  2 个评论
dcydhb dcydhb
dcydhb dcydhb 2018-12-20
is there a way that we could use the form
m(0)=1;
m(1)=1;
m(2)=1;
oter than assign it in the matrix?
this form is convenient for the postprocess
KSSV
KSSV 2018-12-20
Remember matlab index starts from 1...the index should be always positive.
m(0)=1;
m(1)=1;
m(2)=1;
The above is same as:
m = [1 1 1] ;
The above step is short, effective. You can access the elements using:
m(1)
m(2)
m(3)
MATLAB is very effificent and simple.

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madhan ravi
madhan ravi 2018-12-20
why? the below works because the right side should be a symbolic object to perform the operation you need
syms m(k)
m(k)=k
symsum(m(k),k,0,2)

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