Re: [R] Seeking Assistance: Plotting Sea Current Vectors in R

On Tue, Jul 25, 2023 at 9:30 PM konstantinos christodoulou > wrote: > > > > Dear Rcommunity, > > > > I hope this email finds you well. I am writing to seek your assistance > with > > a data visualization problem I am facing while working with R. > >

[R] Seeking Assistance: Plotting Sea Current Vectors in R

Dear Rcommunity, I hope this email finds you well. I am writing to seek your assistance with a data visualization problem I am facing while working with R. Problem Description: I have a dataframe named "df" containing the following columns: "longitude", "latitude", "sea_currents_mag", and "sea_c

Re: [R] Filtering DataFrame by Hours using dateRangeInput in Shiny

you should post questions about it rather than here I think. > > -- Bert > > On Wed, May 24, 2023 at 3:11 AM konstantinos christodoulou < > konstantinos.christodoul...@gmail.com> wrote: > >> Thank you Ivan for sharing this information! I will check it out. >> >>

Re: [R] Filtering DataFrame by Hours using dateRangeInput in Shiny

Thank you Ivan for sharing this information! I will check it out. BR, Kostas On Wed, May 24, 2023 at 12:46 PM Ivan Krylov wrote: > В Wed, 24 May 2023 10:47:54 +0300 > konstantinos christodoulou > пишет: > > > Dear R Support Team, > > If you need paid support for S

[R] Filtering DataFrame by Hours using dateRangeInput in Shiny

Dear R Support Team, I have a dataframe in R with a column named 'start_time,' which is classified as POSIXct. My objective is to use the dateRangeInput() widget in Shiny to filter the dataset based on the 'start_time' column, specifically by selecting hours on a particular day. My dataframe is g

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

> -Original Message- > > From: R-help On Behalf Of konstantinos > > christodoulou > > Sent: Tuesday, January 31, 2023 10:16 AM > > To: r-help mailing list > > Subject: [R] How to calculate the derivatives at each data point? > > > > Hi eve

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

at 12:18 PM Ivan Krylov wrote: > В Tue, 31 Jan 2023 11:16:21 +0200 > konstantinos christodoulou > пишет: > > > How can I find the derivatives of the atmospheric measurements at each > > altitude? > > Welcome to the world of finite difference methods! If you can find

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

Australia > Tel: (+61) 0403 138 955 > Email: a...@unimelb.edu.au > Website: https://researchers.ms.unimelb.edu.au/~apro@unimelb/ > > I acknowledge the Traditional Owners of the land I inhabit, and pay my > respects to their Elders. > On 31 Jan 2023 at 8:17 PM +1100, konstantinos

[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,

Re: [R] replace NA into - for specific column

Hi Kai, You can also try this: proband_crc2 %>% mutate(MMR = replace(MMR, MMR =="NA", "-")) Thanks, Kostas On Wed, Jun 2, 2021 at 11:59 AM Jim Lemon wrote: > Hi Kai, > Maybe this will help: > > proband_crc2<-data.frame(MMR=rep(c(NA,"+"),3)) > proband_crc2 > proband_crc2$MMR[is.na(proband_cr