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-boun...@r-project.org> On Behalf Of konstantinos > christodoulou > Sent: Tuesday, January 31, 2023 10:16 AM > To: r-help mailing list <r-help@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]] > > ______________________________________________ > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code.
______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
