Extract a range of frequencies from a vector/array
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I hope you are in good health.
I am trying to select a range of frequencies from the given data set.
new_value_from_fnew = fnew(fnew = 10e+009 | fnew <= 30e+009);
However, I get an error when I try to set the initial and final value saying that 'Unable to use a value of type string as an index.'. I have tried changing the data type as well but didn't work either.
Basically, I want to only select the frequencies from 10GHz to 30GHz and discard the rest of the values so I can display the graph from 10GHz to 30GHz and perform further analysis on the given range only.
Any help will be appreciated.