Calculate error of a run, SNICSer style
Arguments
- run_val
The ratio of the run to normalize
- run_err
The error of the run to normalize
- std_vals
A vector of standard ratios to normalize with
- std_errs
A vector of errors of the standard runs
- std_rat
The standard ratio(s). May be one value for all stds used or a vector of values for each standard in std_vals, defaults to OX-I