[R] How to calculate the derivatives at each data point?

[konstantinos christodoulou]

Thank you Petr!

On Tue, Jan 31, 2023 at 11:58 AM PIKAL Petr <petr.pikal using precheza.cz> wrote:

> Hi Konstantinos
>
> Not exactly derivative but
> > diff(df[,2])
> [1] -0.01 -0.01 -0.01 -0.01  0.00  0.01 -0.02 -0.03 -0.02
>
> May be enaough for you.
>
> Cheers
> Petr
>
> >
> > -----Original Message-----
> > From: R-help <r-help-bounces using r-project.org> On Behalf Of konstantinos
> > christodoulou
> > Sent: Tuesday, January 31, 2023 10:16 AM
> > To: r-help mailing list <r-help using r-project.org>
> > Subject: [R] How to calculate the derivatives at each data point?
> >
> > Hi everyone,
> >
> > I have a vector with atmospheric measurements (x-axis) that is
> > obtained/calculated at different altitudes (y-axis). The altitude is
> uniformly
> > distributed every 7 meters.
> > For example my dataframe is:
> > df <- dataframe(
> > *altitude* = c(1005, 1012, 1019, 1026, 1033, 1040, 1047, 1054, 1061,
> 1068),
> > *atm_values* = c(1.41, 1.40, 1.39, 1.38, 1.37, 1.37, 1.38, 1.36, 1.33,
> 1.31)
> >                          )
> >
> > How can I find the derivatives of the atmospheric measurements at each
> > altitude?
> >
> > I look forward to hearing from you!
> >
> > Thanks,
> > Kostas
> >
> >       [[alternative HTML version deleted]]
> >
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>

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