Zeroing the start of my vectors with a for loop

Hello, I have 6 vectors. Gauge1, Gauge2, Gauge3...Gauge6. They do not all start with a 0. So I want to reset each vector with a for loop.

for i=1:6
    Gauge(i)=Gauge(i)-Gauge(i)(1);
end

So it should subtract all numbers in the vector with the first number in the vector...

But I get this from matlab ------ ()-indexing must appear last in an index expression. ------

What should I change. Thank you

Answer 1

[dpb]

"I have 6 vectors. Gauge1, Gauge2, Gauge3..."

Don't name variables this way!!!! See the FAQ for why not: Avoid using the eval function

As you see, you can't address these variables easily as Matlab can't interpret variable names dynamically for ordinary arrays. Instead create a single array gauges of size [N,6]. Then the above operation becomes trivial--

gauges=bsxfun(@minus,gauges,gauges(1,:));

See

doc bsxfun % for details on the singleton expansion to subtract the one row from the rest

Answer 2

[Stephen23]

http://www.mathworks.com/help/matlab/matlab_prog/string-evaluation.html

https://www.mathworks.com/matlabcentral/answers/304528-tutorial-why-variables-should-not-be-named-dynamically-eval