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...t;) # Convert to a data frame grib_df <- as.data.frame(grib_data) # Write the data frame to a CSV file write.csv(grib_df, file = "output.csv") I would be more than happy if anyone could help me. Sincerely -- Best Regards Javad Bayat M.Sc. Environment Engineering Alternative Mail: bayat194 at yahoo.com

Dear Bert and Sara; I have searched on the internet and found some way to do this like python. But python is so complicated to me as it needs many steps to be done for reading and converting it. I will try terra package to convert it. On Tue, 25 Jun 2024, 15:15 javad bayat, <j.bayat194 at gmail.com> wrote: > Richard, > Many thanks for your email. > I had attached the grib file to the original email to R help team but it > seems you did not receive it. > Unfortunately, I do not know how to reduce the volume or extract some of > the grib file data to send it f...

...myself. Does the licence for the data even allow you to send some of > it in a message? Which parameters are you extracting? When you say > "it didn't work", what actually happened? Which step went wrong and how? > > > On Tue, 25 Jun 2024 at 20:33, javad bayat <j.bayat194 at gmail.com> wrote: > > > > Dear all; > > I have downloaded meteorology data from " > > > https://cds.climate.copernicus.eu/cdsapp#!/dataset/reanalysis-era5-single-levels?tab=form > " > > as .grib format. It has hourly data of a complete year (every...

...t, but if the lake is cylindrical == constant cross sectional area at all depths, then height doubles when the volume does and vice versa. Otherwise you have to know how area varies with height or use more sensible approximations thereto. Cheers, Bert On Tue, Dec 5, 2023, 20:13 javad bayat <j.bayat194 at gmail.com> wrote: > Dear all; > I am trying to calculate the volume of a polygon shapefile according to a > DEM raster. I have provided some codes at the end of this email.I dont know > if the codes are correct or not. Following this, I have another question > too. > I wan...

...r <- crop(r, p) r <- mask(r, p) x <- exact_extract(r, p, coverage_area = TRUE) x1 = as.data.frame(x[1]) head(x1) x1 = na.omit(x1) x1$Height = max(x1[,1]) - x1[,1] x1$Vol = x1[,2] * x1[,3] sum(x1$Vol) " -- Best Regards Javad Bayat M.Sc. Environment Engineering Alternative Mail: bayat194 at yahoo.com [[alternative HTML version deleted]]

Hi Javad: I know a lot about reading GRIB files, I work with them all the time. But if you don?t make the file available, or point me to where I can download it, there is not much I can do. Thanks, -Roy > On Sep 25, 2024, at 9:41?PM, javad bayat <j.bayat194 at gmail.com> wrote: > > Dear all; > Many thanks for your responses. Actually it is not completely a GIS file, it is a data file which stores meteorological data of a specific region. But the site allows downloading with grib format and as I searched to read this type of file in R, I f...

...r-sig-geo if you don't get a satisfactory > >> response here. I assume there's a lot of expertise there on handling > >> raster-type data. > >> > >> Cheers, > >> Bert > >> > >> On Mon, Sep 23, 2024 at 11:31?PM javad bayat <j.bayat194 at gmail.com> > wrote: > >>> > >>> Dear R users; > >>> I have downloaded a grib file format (Met.grib) and I want to export > its > >>> data to excel file. Also I want to do some mathematic on some columns. > >> But > >>>...

...art of the R "way". Or there's gribr https://rdrr.io/github/nawendt/gribr/man/gribr.html which wraps ecCodes in R. I still don't understand what "doesn't work" means. Which step goes wrong and how does it misbehave? On Wed, 26 Jun 2024 at 06:02, javad bayat <j.bayat194 at gmail.com> wrote: > > Richard, > Many thanks for your email. > I had attached the grib file to the original email to R help team but it seems you did not receive it. > Unfortunately, I do not know how to reduce the volume or extract some of the grib file data to send it for you...

...oned, this is a great topic for R-sig-geo, where you'd probably get specialist answers like the lake morphology package https://cran.r-project.org/web/packages/lakemorpho/index.html which is explicitly designed for this kind of question. Sarah On Tue, Dec 5, 2023 at 11:13?PM javad bayat <j.bayat194 at gmail.com> wrote: > > Dear all; > I am trying to calculate the volume of a polygon shapefile according to a > DEM raster. I have provided some codes at the end of this email.I dont know > if the codes are correct or not. Following this, I have another question > too. > I...

Attachments CAN NOT be sent to group On Thu, 26 Sep 2024, 21:22 javad bayat, <j.bayat194 at gmail.com> wrote: > Dear Roy, > Sorry for my mistake, I thought I have uploaded the grib file. > I really apologise for that. I will send it on Saturday. > Thank you very much. > > On Thu, 26 Sept 2024, 17:40 Roy Mendelssohn - NOAA Federal, < > roy.mendelssohn at no...

...Javad: > > I know a lot about reading GRIB files, I work with them all the time. > But if you don?t make the file available, or point me to where I can > download it, there is not much I can do. > > Thanks, > > -Roy > > On Sep 25, 2024, at 9:41?PM, javad bayat <j.bayat194 at gmail.com> wrote: > > Dear all; > Many thanks for your responses. Actually it is not completely a GIS file, > it is a data file which stores meteorological data of a specific region. > But the site allows downloading with grib format and as I searched to read > this type of...

...there's gribr https://rdrr.io/github/nawendt/gribr/man/gribr.html > which wraps ecCodes in R. > > I still don't understand what "doesn't work" means. Which step goes > wrong and how does it misbehave? > > > On Wed, 26 Jun 2024 at 06:02, javad bayat <j.bayat194 at gmail.com> wrote: > > > > Richard, > > Many thanks for your email. > > I had attached the grib file to the original email to R help team but it seems you did not receive it. > > Unfortunately, I do not know how to reduce the volume or extract some of the grib fil...

Dear R users I am trying to find a formula to calculate the angle of a polyline. Is there a way to do this? Many thanks. -- Best Regards Javad Bayat M.Sc. Environment Engineering Alternative Mail: bayat194 at yahoo.com [[alternative HTML version deleted]]

Homework? -- Sent from my Android device with K-9 Mail. Please excuse my brevity. On April 7, 2024 8:27:18 AM EDT, javad bayat <j.bayat194 at gmail.com> wrote: >Dear all; >I have a question about the water level of a reservoir, when the volume >changed or doubled. >There is a DEM file with the highest elevation 1267 m. The lowest elevation >is 1230 m. The current volume of the reservoir is 7,000,000 m3 at 1240 m. &gt...

...the reservoir shape. E.g. in a cylindrical > reservoir halving the water level also halves the volume, but in a conical > reservoir, halving the level leaves only 1/8 of the volume. > > > > -pd > > > > > > > >> On 8 Apr 2024, at 05:55 , javad bayat <j.bayat194 at gmail.com> wrote: > >> > >> Dear all; > >> Many thanks for your replies. This was not homework. I apologize. > >> Let me explain more. > >> There is a dam constructed in a valley with the highest elevation of > 1255 > >> m. The area of...

...nd Wind_Speed that the data extracted from the plot by analyzing it. Is there any library to do this? or any function to write for this purpose? I would be more than happy if you please help me to do this. Sincerely -- Best Regards Javad Bayat M.Sc. Environment Engineering Alternative Mail: bayat194 at yahoo.com [[alternative HTML version deleted]]

You might try posting on r-sig-geo if you don't get a satisfactory response here. I assume there's a lot of expertise there on handling raster-type data. Cheers, Bert On Mon, Sep 23, 2024 at 11:31?PM javad bayat <j.bayat194 at gmail.com> wrote: > > Dear R users; > I have downloaded a grib file format (Met.grib) and I want to export its > data to excel file. Also I want to do some mathematic on some columns. But > I got error. I would be more than happy if anyone can help me to do this. I > have pr...

...>> You might try posting on r-sig-geo if you don't get a satisfactory >> response here. I assume there's a lot of expertise there on handling >> raster-type data. >> >> Cheers, >> Bert >> >> On Mon, Sep 23, 2024 at 11:31?PM javad bayat <j.bayat194 at gmail.com> wrote: >>> >>> Dear R users; >>> I have downloaded a grib file format (Met.grib) and I want to export its >>> data to excel file. Also I want to do some mathematic on some columns. >> But >>> I got error. I would be more than happ...

A polyline by definition has many angles, so your question is ill-formed. And this is a question about math, not R, so is off topic here. I suggest reading Wikipedia. -- Sent from my phone. Please excuse my brevity. On January 29, 2018 11:10:02 PM PST, javad bayat <j.bayat194 at gmail.com> wrote: >Dear R users >I am trying to find a formula to calculate the angle of a polyline. Is >there a way to do this? >Many thanks.

...polyline by definition has many angles, so your question is ill-formed. > And this is a question about math, not R, so is off topic here. I suggest > reading Wikipedia. > -- > Sent from my phone. Please excuse my brevity. > > On January 29, 2018 11:10:02 PM PST, javad bayat <j.bayat194 at gmail.com> > wrote: > >Dear R users > >I am trying to find a formula to calculate the angle of a polyline. Is > >there a way to do this? > >Many thanks. > > ______________________________________________ > R-help at r-project.org mailing list -- To UNSUBSCR...