hello sir... i am trying to extract the chlorophyll data of particular lat and lon from the world chlorophyll data from the netcdf file in R. as i am new to R i am facing the problem related to it when i am trying expand.grid command it is showing me this message.....message is followed.....its my kind request please help me with the same ttt<-expand.grid(lon,lat,time) Error in paste0(nmc[i], "=", if (is.numeric(x)) format(x) else x) : cannot coerce type 'closure' to vector of type 'character'
here is the print of my netcdf file for you kind information.....follow... > print(tt) File E:\chlorophyll data research student..mayur t..KUFOS\1997\ESACCI-OC-L3S-CHLOR_A-MERGED-1M_MONTHLY_4km_ GEO_PML_OCx-199709-fv3.1.nc <http://esacci-oc-l3s-chlor_a-merged-1m_monthly_4km_geo_pml_ocx-199709-fv3.1.nc/> (NC_FORMAT_NETCDF4_CLASSIC): 9 variables (excluding dimension variables): float MERIS_nobs_sum[lon,lat,time] _FillValue: 0 long_name: Count of the number of observations from the MERIS sensor contributing to this bin cell number_of_files_composited: 19 float MODISA_nobs_sum[lon,lat,time] _FillValue: 0 long_name: Count of the number of observations from the MODIS (Aqua) sensor contributing to this bin cell number_of_files_composited: 19 float SeaWiFS_nobs_sum[lon,lat,time] _FillValue: 0 long_name: Count of the number of observations from the SeaWiFS (GAC and LAC) sensor contributing to this bin cell number_of_files_composited: 19 float VIIRS_nobs_sum[lon,lat,time] _FillValue: 0 long_name: Count of the number of observations from the VIIRS sensor contributing to this bin cell number_of_files_composited: 19 float chlor_a[lon,lat,time] _FillValue: 9.96920996838687e+36 long_name: Chlorophyll-a concentration in seawater (not log-transformed), generated by SeaDAS using a blended combination of OCI (OC4v6 + Hu's CI), OC3 and OC5, depending on water class memberships units: milligram m-3 ancillary_variables: chlor_a_log10_rmsd chlor_a_log10_bias grid_mapping: crs standard_name: mass_concentration_of_chlorophyll_a_in_sea_water units_nonstandard: mg m^-3 parameter_vocab_uri: http://vocab.nerc.ac.uk/collection/P04/current/ float chlor_a_log10_bias[lon,lat,time] _FillValue: 9.96920996838687e+36 long_name: Bias of log10-transformed chlorophyll-a concentration in seawater. grid_mapping: crs rel: uncertainty comment: Uncertainty lookups derived from file: /data/datasets/CCI/v3.1-production/stage09b-uncertainty_tables/chlor_a/ cci_chla_bias.dat ref: http://www.esa-oceancolour-cci.org/?q=webfm_send/581 float chlor_a_log10_rmsd[lon,lat,time] _FillValue: 9.96920996838687e+36 long_name: Root-mean-square-difference of log10-transformed chlorophyll-a concentration in seawater. grid_mapping: crs rel: uncertainty comment: Uncertainty lookups derived from file: /data/datasets/CCI/v3.1-production/stage09b-uncertainty_tables/chlor_a/ cci_chla_rmsd.dat ref: http://www.esa-oceancolour-cci.org/?q=webfm_send/581 int crs[time] grid_mapping_name: latitude_longitude float total_nobs_sum[lon,lat,time] _FillValue: 0 long_name: Count of the total number of observations contributing to this bin cell number_of_files_composited: 19 3 dimensions: time Size:1 axis: T standard_name: time units: days since 1970-01-01 00:00:00 lat Size:4320 units: degrees_north long_name: latitude standard_name: latitude valid_min: -89.9791641235352 valid_max: 89.9791641235352 axis: Y lon Size:8640 units: degrees_east long_name: longitude standard_name: longitude valid_min: -179.97917175293 valid_max: 179.97917175293 axis: X 47 global attributes: Metadata_Conventions: Unidata Dataset Discovery v1.0 cdm_data_type: Grid comment: See summary attribute creator_email: [email protected] creator_name: Plymouth Marine Laboratory creator_url: http://esa-oceancolour-cci.org geospatial_lat_max: 90 geospatial_lat_min: -90 geospatial_lat_resolution: .04166666666666666666 geospatial_lat_units: decimal degrees north geospatial_lon_max: 180 geospatial_lon_min: -180 geospatial_lon_resolution: .04166666666666666666 geospatial_lon_units: decimal degrees east geospatial_vertical_max: 0 geospatial_vertical_min: 0 institution: Plymouth Marine Laboratory keywords: satellite,observation,ocean,ocean colour keywords_vocabulary: none license: ESA CCI Data Policy: free and open access. When referencing, please use: Ocean Colour Climate Change Initiative dataset, Version <Version Number>, European Space Agency, available online at http://www.esa-oceancolour-cci.org. We would also appreciate being notified of publications so that we can list them on the project website at http://www.esa-oceancolour-cci.org/?q=publications naming_authority: uk.ac.pml number_of_optical_water_types: 14 platform: Orbview-2,Aqua,Envisat,Suomi-NPP processing_level: Level-3 project: Climate Change Initiative - European Space Agency references: http://www.esa-oceancolour-cci.org/ sensor: SeaWiFS,MODIS,MERIS,VIIRS source: NASA SeaWiFS L2 R2014.0 LAC and GAC, MODIS-Aqua L1A, MERIS L1B 3rd reprocessing inc OCL corrections, NASA VIIRS L2 R2014.0.1 (data identical to R2014.0.2) spatial_resolution: 4km nominal at equator standard_name_vocabulary: NetCDF Climate and Forecast (CF) Metadata Conventions Version 1.6 title: ESA CCI Ocean Colour Product number_of_files_composited: 19 creation_date: Tue Aug 23 09:00:23 2016 date_created: Tue Aug 23 09:00:23 2016 time_coverage_resolution: P1M time_coverage_duration: P1M start_date: 01-SEP-1997 00:00:00.000000 stop_date: 30-SEP-1997 23:59:00.000000 time_coverage_start: 199709010000Z time_coverage_end: 199709302359Z netcdf_file_type: NETCDF4_CLASSIC history: Source data were: ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_GEO_PML_ OCx_QAA-19970904-fv3.1.nc <http://esacci-oc-l3s-oc_products-merged-1d_daily_4km_geo_pml_ocx_qaa-19970904-fv3.1.nc/> , ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_GEO_PML_ OCx_QAA-19970906-fv3.1.nc <http://esacci-oc-l3s-oc_products-merged-1d_daily_4km_geo_pml_ocx_qaa-19970906-fv3.1.nc/> , ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_GEO_PML_ OCx_QAA-19970909-fv3.1.nc <http://esacci-oc-l3s-oc_products-merged-1d_daily_4km_geo_pml_ocx_qaa-19970909-fv3.1.nc/> , ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_GEO_PML_ OCx_QAA-19970910-fv3.1.nc <http://esacci-oc-l3s-oc_products-merged-1d_daily_4km_geo_pml_ocx_qaa-19970910-fv3.1.nc/> , ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_GEO_PML_ OCx_QAA-19970915-fv3.1.nc <http://esacci-oc-l3s-oc_products-merged-1d_daily_4km_geo_pml_ocx_qaa-19970915-fv3.1.nc/> , ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_GEO_PML_ OCx_QAA-19970916-fv3.1.nc <http://esacci-oc-l3s-oc_products-merged-1d_daily_4km_geo_pml_ocx_qaa-19970916-fv3.1.nc/> , ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_GEO_PML_ OCx_QAA-19970918-fv3.1.nc <http://esacci-oc-l3s-oc_products-merged-1d_daily_4km_geo_pml_ocx_qaa-19970918-fv3.1.nc/> , ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_GEO_PML_ OCx_QAA-19970919-fv3.1.nc <http://esacci-oc-l3s-oc_products-merged-1d_daily_4km_geo_pml_ocx_qaa-19970919-fv3.1.nc/> , ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_GEO_PML_ OCx_QAA-19970920-fv3.1.nc <http://esacci-oc-l3s-oc_products-merged-1d_daily_4km_geo_pml_ocx_qaa-19970920-fv3.1.nc/> , ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_GEO_PML_ OCx_QAA-19970921-fv3.1.nc <http://esacci-oc-l3s-oc_products-merged-1d_daily_4km_geo_pml_ocx_qaa-19970921-fv3.1.nc/> , ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_GEO_PML_ OCx_QAA-19970922-fv3.1.nc <http://esacci-oc-l3s-oc_products-merged-1d_daily_4km_geo_pml_ocx_qaa-19970922-fv3.1.nc/> , ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_GEO_PML_ OCx_QAA-19970923-fv3.1.nc <http://esacci-oc-l3s-oc_products-merged-1d_daily_4km_geo_pml_ocx_qaa-19970923-fv3.1.nc/> , ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_GEO_PML_ OCx_QAA-19970924-fv3.1.nc <http://esacci-oc-l3s-oc_products-merged-1d_daily_4km_geo_pml_ocx_qaa-19970924-fv3.1.nc/> , ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_GEO_PML_ OCx_QAA-19970925-fv3.1.nc <http://esacci-oc-l3s-oc_products-merged-1d_daily_4km_geo_pml_ocx_qaa-19970925-fv3.1.nc/> , ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_GEO_PML_ OCx_QAA-19970926-fv3.1.nc <http://esacci-oc-l3s-oc_products-merged-1d_daily_4km_geo_pml_ocx_qaa-19970926-fv3.1.nc/> , ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_GEO_PML_ OCx_QAA-19970927-fv3.1.nc <http://esacci-oc-l3s-oc_products-merged-1d_daily_4km_geo_pml_ocx_qaa-19970927-fv3.1.nc/> , ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_GEO_PML_ OCx_QAA-19970928-fv3.1.nc <http://esacci-oc-l3s-oc_products-merged-1d_daily_4km_geo_pml_ocx_qaa-19970928-fv3.1.nc/> , ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_GEO_PML_ OCx_QAA-19970929-fv3.1.nc <http://esacci-oc-l3s-oc_products-merged-1d_daily_4km_geo_pml_ocx_qaa-19970929-fv3.1.nc/> , ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_GEO_PML_ OCx_QAA-19970930-fv3.1.nc <http://esacci-oc-l3s-oc_products-merged-1d_daily_4km_geo_pml_ocx_qaa-19970930-fv3.1.nc/> ; netcdf_compositor_cci composites Rrs_412, Rrs_443, Rrs_490, Rrs_510, Rrs_555, Rrs_670, water_class1, water_class2, water_class3, water_class4, water_class5, water_class6, water_class7, water_class8, water_class9, water_class10, water_class11, water_class12, water_class13, water_class14, atot_412, atot_443, atot_490, atot_510, atot_555, atot_670, aph_412, aph_443, aph_490, aph_510, aph_555, aph_670, adg_412, adg_443, adg_490, adg_510, adg_555, adg_670, bbp_412, bbp_443, bbp_490, bbp_510, bbp_555, bbp_670, chlor_a, kd_490, chlor_a_log10_bias, Rrs_412_bias, Rrs_443_bias, Rrs_490_bias, Rrs_510_bias, Rrs_555_bias, Rrs_670_bias, aph_412_bias, aph_443_bias, aph_490_bias, aph_510_bias, aph_555_bias, aph_670_bias, adg_412_bias, adg_443_bias, adg_490_bias, adg_510_bias, adg_555_bias, adg_670_bias, kd_490_bias with --mean, chlor_a_log10_rmsd, Rrs_412_rmsd, Rrs_443_rmsd, Rrs_490_rmsd, Rrs_510_rmsd, Rrs_555_rmsd, Rrs_670_rmsd, aph_412_rmsd, aph_443_rmsd, aph_490_rmsd, aph_510_rmsd, aph_555_rmsd, aph_670_rmsd, adg_412_rmsd, adg_443_rmsd, adg_490_rmsd, adg_510_rmsd, adg_555_rmsd, adg_670_rmsd, kd_490_rmsd with --root-mean-square, and SeaWiFS_nobs, MODISA_nobs, MERIS_nobs, VIIRS_nobs, total_nobs - with --total 1471940520 Subsetted from standardised_geo/ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1M_ MONTHLY_4km_GEO_PML_OCx_QAA-199709-fv3.1.nc <http://esacci-oc-l3s-oc_products-merged-1m_monthly_4km_geo_pml_ocx_qaa-199709-fv3.1.nc/> to only include variables MERIS_nobs_sum,MODISA_nobs_sum,SeaWiFS_nobs_sum,VIIRS_ nobs_sum,chlor_a,chlor_a_log10_bias,chlor_a_log10_rmsd, crs,lat,lon,time,total_nobs_sum Conventions: CF-1.6 product_version: 3.1 summary: Data products generated by the Ocean Colour component of the European Space Agency Climate Change Initiative project. These files are daily composites of merged sensor (MERIS, MODIS Aqua, SeaWiFS LAC & GAC, VIIRS) products. MODIS Aqua and MERIS were band-shifted and bias-corrected to SeaWiFS bands and values using a temporally and spatially varying scheme based on the overlap years of 2003-2007. VIIRS was band-shifted and bias-corrected in a second stage against the MODIS Rrs that had already been corrected to SeaWiFS levels, for the overlap period 2012-2013. VIIRS and SeaWiFS Rrs were derived from standard NASA L2 products; MERIS and MODIS from a combination of NASA's l2gen (for basic sensor geometry corrections, etc) and HYGEOS Polymer v3.5 (for atmospheric correction). The Rrs were binned to a sinusoidal 4km level-3 grid, and later to 4km geographic projection, by Brockmann Consult's BEAM. Derived products were generally computed with the standard SeaDAS algorithms. QAA IOPs were derived using the standard SeaDAS algorithm but with a modified backscattering table to match that used in the bandshifting. The final chlorophyll is a combination of OC4, Hu's CI and OC5, depending on the water class memberships. Uncertainty estimates were added using the fuzzy water classifier and uncertainty estimation algorithm of Tim Moore as documented in Jackson et al (2017). tracking_id: 659b397a-953c-4814-a3e2-460d6218fcfa id: ESACCI-OC-L3S-CHLOR_A-MERGED-1M_MONTHLY_4km_GEO_PML_OCx-199709-fv3.1.nc <http://esacci-oc-l3s-chlor_a-merged-1m_monthly_4km_geo_pml_ocx-199709-fv3.1.nc/> [[alternative HTML version deleted]] ______________________________________________ [email protected] 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.
