difference between e lines of codes

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kay Dee
kay Dee 2018-10-7
编辑： Stephen23 2018-10-7
Hello i am trying out a code and i would love to ask the difference between these 2 lines of code H=(g/(1+g))./(1+t*s/(1+g));(where there is a ./) and H=(g/(1+g))/(1+t*s/(1+g));(where there is no ./ sign ) P.s. the second one shows me an error also where should i use that ./ sign and where i shouldnt use it ? thanks very much

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Stephen23
Stephen23 2018-10-7
编辑：Stephen23 2018-10-7
"...should i use that ./ sign and where i shouldnt use it?"
You pick the operation based on what operator you need to use. If you need to perform element-wise division, then use ./, but if you need to perform least squares of a system of equations, use /.
Knowing the difference between matrix operations and element-wise operations is critical for being able to use MATLAB properly: not just division, but multiplication, transpose, and power too. You need to read the MATLAB documentation:
https://www.mathworks.com/help/matlab/matlab_prog/array-vs-matrix-operations.html
In a nutshell, the commands with the period . perform array operations (i.e. element-wise), whereas those without perform matrix operations (i.e. linear algebra). Read the help for each specific operation to know what it does.

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