how to code variable to code

like in box name have s1 s2 s3 s4 s5 s6 .. sn

s1 = 1

s2 = 2

s3 = 3

sn = n

**************************

for i=1:n

s<i> do something

end

************

behind s<> how to code variable to code

Answer 1

[madhan ravi]

Completely terrible idea see https://in.mathworks.com/matlabcentral/answers/304528-tutorial-why-variables-should-not-be-named-dynamically-eval

[Anantachai Chotkamsri]

sry i can't find my answer T^T

[Walter Roberson]

The answer is "Don't DO That!"

There are ways to do it, but there are very very few good reasons to do it considering the alternatives.

[Anantachai Chotkamsri]

pls. can u teach me? cos my algorithm need to use this function

[Rik]

Explain what you want to do. Then we can help you solve your actual problem.

[Anantachai Chotkamsri]

i want to know how to use for loop for varible

example >> i create

-------------------------------------

for i=1:1000

eval(sprintf('s%d = i+1', i));

end

------------------------------------------

i will got s1 ,s2 ,s3 , ...sn on work space.

but it too many n i can't typing. i want to use for loop to help but i dont know about code.

-----------------------------------------------------------------------

for i=1:n

s( in this blacket how to tell matlab when i use for loop )

i know i can typing

s1 = do something

s2 = do something

s3 = do something

but i have a lot of n. i want for loop to do this for me.

like

s(i) = do something <<< for easy than typing

end

-----------------------------------------------------------------------

thank you.

[Dennis]

I think you already identified the problem, do not create variables s1,s2,s3 i n the first place.

s=ones(1000,1);
for i=1:1000
s(i)=i+1;
end

[Stephen23]

@Anantachai Chotkamsri: what is stopping you from just using indexing?

Indexing is simple, neat, and very effiicient (unlike what you are trying to do).

Indexing is also explained in the introductory tutorials:

https://www.mathworks.com/help/matlab/getting-started-with-matlab.html

and also explained in the link that madhan ravi gave you.

[Anantachai Chotkamsri]

thank you so much for help everyone. <3