module Ms::Calc
Public Instance Methods
ppm_range_at(mz, ppm)
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# File lib/ms/calc.rb, line 18 def ppm_range_at(mz, ppm) mz = mz.to_f tol = ppm_tol_at(mz, ppm) mz-tol...mz+tol end
ppm_span_at(mz, ppm)
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# File lib/ms/calc.rb, line 13 def ppm_span_at(mz, ppm) tol = ppm_tol_at(mz, ppm) [mz-tol, mz+tol] end
ppm_tol_at(mz, ppm)
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ppm calculations… maybe use RUnit
# File lib/ms/calc.rb, line 9 def ppm_tol_at(mz, ppm) 1.0 * mz * ppm / 10**6 end
round(n, precision)
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Rounds n to the specified precision (ie number of decimal places)
# File lib/ms/calc.rb, line 25 def round(n, precision) factor = 10**precision.to_i (n * factor).round.to_f / factor end