Help to transform math formula to matlab

조회 수: 1(최근 30일)
Matthew Lima
Matthew Lima 2021년 11월 14일
댓글: Dave B 2021년 11월 15일
I am trying to transform this formula into matlab, but I can't use a for/while loop. X is an array with dimension n and every position receives this sum.
I tried like this, but I couldn't remove the loop here, can I achieve this without a loop?
I also tried to use arrayfun, but without success because every position of the array was receiving the same value.
  댓글 수: 7
Dave B
Dave B 2021년 11월 14일
편집: Dave B 2021년 11월 15일
Ah I was trying to avoid doing it for you so that you could feel the satisfaction :) Glad it feels simple, hope it stays that way as you delve deeper!
note this is the simplified version of what you wrote:
x = log(1:n) * sum(exp((1:m).^2))

댓글을 달려면 로그인하십시오.


Sulaymon Eshkabilov
Sulaymon Eshkabilov 2021년 11월 15일
Using the vectorization:
format long
XSum1 = sum(log(jj).*exp(jj.^2))
XSum1 =
% Or alternatively
Xs = log(jj).*exp(jj.^2);
XSum2 =
% Sum stepby-step:
ans = 1×5
1.0e+11 * 0 0.000000000378446 0.000000089399921 0.000123277048990 1.158997425794889
  댓글 수: 1
Dave B
Dave B 2021년 11월 15일
Note that i and j are not the same in the question, the correct answer here is:
x = log(1:n) * sum(exp((1:m).^2))
as discussed in the comments above.

댓글을 달려면 로그인하십시오.

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by