I have just started attempting programming in Python and am using Spyder with Python 3.5.2 on a Linux platform. (I first started programing in Fortran II using punched paper tape. Yes, am a rather elderly . . .).

I have bumbled through, what I foolishly thought was a simple problem, a short program to change frequency to wavelength for a plot of ultraviolet spectra. I have attached a pdf of the program.

During my attempt at programming I have printed results at various stages. Printing wavelength = [row[0] for row in data] gives me 25000 as the first frequency in the wavelength list (the corresponding wavelength is 400).

To change the frequency to wave length I did the following:


p=1/1e7
wave_length = p*np.array(frequency)

(The relationship between wavelength and frequency is: wavelength = 1.0e7/frequency, where 1e7 is the speed of light)


Apparently whhat I have managed to do is divide each element of the frequency 
list by 1/1e7.

What I want to do is divide 1e7 by each element of the freqquency list.

How di I do this?

Please keep in mind that many, many hyears ago I learned the ole arithmetic and 
an not trying to start a flame war.

Thanks in advance for the assistance tha I am sure will be most helpful.

--
Stephen P. Molnar, Ph.D.        Life is a fuzzy set
www.Molecular-Modeling.net      Stochastic and multivariate
(614)312-7528 (c)
Skype:  smolnar1

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