Stop the Inf numbers

Hi all,

have this bit of code that reads:

function R = resistors()
	

     r = transpose(100:100:400);%transpose to column vector
     
     
     
     R = 1./((1/r)); % (.) makes the vector even
end

and its results read;

>> resistors

ans =

   Inf   Inf   Inf   400

i want to stop or not have the Inf, but the real numbers, can someone point me in the right direction? need it for an assesment.

Thanks

Jon

[darova]

1/(1/r)

Is the same as just r

>> r = 1:5
r =
     1     2     3     4     5
>> 1./(1./r)
ans =
     1     2     3     4     5

[Jonathan Stanton]

cheers, works lovely!!

[Stephen23]

"1/(1/r) Is the same as just r"

This is totally incorrect.

How is solving systems of linear equations anything like calculating the inverse?

Answer 1

[Stephen23]

You used the wrong operator: mrdivide / solves a system of linear equations.

You need to learn the differrences between matrix operations and array operations, otherwise all of your MATLAB code will produce meaningless rubbish outputs:

https://www.mathworks.com/help/matlab/matlab_prog/array-vs-matrix-operations.html

Use rdivide ./

[John D'Errico]

In my hoped for new post as official WhiteHouse MATLAB counsel, I will recommend that infs and NaNs be forever outlawed. They only confuse people anyway. I might even try to require that pi==3, as this would make many computations much simpler for children in school. By the way, the Earth will soon be mandated to be flat, if I get my way.

My campaign is beginning today. Please get your write-in votes in as soon as possible!

[Stephen23]

https://en.wikipedia.org/wiki/Indiana_Pi_Bill