You can subset studies by identifier or by position using the `[` operator.

# S4 method for studies,missing,missing,missing
[(x, i, j, ..., drop = FALSE)

# S4 method for studies,numeric,missing,missing
[(x, i, j, ..., drop = FALSE)

# S4 method for studies,character,missing,missing
[(x, i, j, ...,
  drop = FALSE)

Arguments

x

A studies object.

i

Position of the identifier or the name of the identifier itself.

j

Not used.

...

Additional arguments not used here.

drop

Not used.

Value

A studies object.

Examples

# Subset a studies object by identifier studies_ex01['GCST001585']
#> An object of class "studies" #> Slot "studies": #> # A tibble: 1 x 13 #> study_id reported_trait initial_sample_… replication_sam… gxe gxg #> <chr> <chr> <chr> <chr> <lgl> <lgl> #> 1 GCST001… Breast size 16,175 European… NA FALSE FALSE #> # … with 7 more variables: snp_count <int>, qualifier <chr>, imputed <lgl>, #> # pooled <lgl>, study_design_comment <chr>, full_pvalue_set <lgl>, #> # user_requested <lgl> #> #> Slot "genotyping_techs": #> # A tibble: 1 x 2 #> study_id genotyping_technology #> <chr> <chr> #> 1 GCST001585 Genome-wide genotyping array #> #> Slot "platforms": #> # A tibble: 1 x 2 #> study_id manufacturer #> <chr> <chr> #> 1 GCST001585 Illumina #> #> Slot "ancestries": #> # A tibble: 1 x 4 #> study_id ancestry_id type number_of_individuals #> <chr> <int> <chr> <int> #> 1 GCST001585 1 initial 16175 #> #> Slot "ancestral_groups": #> # A tibble: 1 x 3 #> study_id ancestry_id ancestral_group #> <chr> <int> <chr> #> 1 GCST001585 1 European #> #> Slot "countries_of_origin": #> # A tibble: 1 x 5 #> study_id ancestry_id country_name major_area region #> <chr> <int> <chr> <chr> <chr> #> 1 GCST001585 1 NA NA NA #> #> Slot "countries_of_recruitment": #> # A tibble: 1 x 5 #> study_id ancestry_id country_name major_area region #> <chr> <int> <chr> <chr> <chr> #> 1 GCST001585 1 NA NA NA #> #> Slot "publications": #> # A tibble: 1 x 7 #> study_id pubmed_id publication_date publication title author_fullname #> <chr> <int> <date> <chr> <chr> <chr> #> 1 GCST001… 22747683 2012-06-29 BMC Med Ge… Gene… Eriksson N #> # … with 1 more variable: author_orcid <chr> #>
# Or by its position in table studies studies_ex01[1]
#> An object of class "studies" #> Slot "studies": #> # A tibble: 1 x 13 #> study_id reported_trait initial_sample_… replication_sam… gxe gxg #> <chr> <chr> <chr> <chr> <lgl> <lgl> #> 1 GCST001… Breast size 16,175 European… NA FALSE FALSE #> # … with 7 more variables: snp_count <int>, qualifier <chr>, imputed <lgl>, #> # pooled <lgl>, study_design_comment <chr>, full_pvalue_set <lgl>, #> # user_requested <lgl> #> #> Slot "genotyping_techs": #> # A tibble: 1 x 2 #> study_id genotyping_technology #> <chr> <chr> #> 1 GCST001585 Genome-wide genotyping array #> #> Slot "platforms": #> # A tibble: 1 x 2 #> study_id manufacturer #> <chr> <chr> #> 1 GCST001585 Illumina #> #> Slot "ancestries": #> # A tibble: 1 x 4 #> study_id ancestry_id type number_of_individuals #> <chr> <int> <chr> <int> #> 1 GCST001585 1 initial 16175 #> #> Slot "ancestral_groups": #> # A tibble: 1 x 3 #> study_id ancestry_id ancestral_group #> <chr> <int> <chr> #> 1 GCST001585 1 European #> #> Slot "countries_of_origin": #> # A tibble: 1 x 5 #> study_id ancestry_id country_name major_area region #> <chr> <int> <chr> <chr> <chr> #> 1 GCST001585 1 NA NA NA #> #> Slot "countries_of_recruitment": #> # A tibble: 1 x 5 #> study_id ancestry_id country_name major_area region #> <chr> <int> <chr> <chr> <chr> #> 1 GCST001585 1 NA NA NA #> #> Slot "publications": #> # A tibble: 1 x 7 #> study_id pubmed_id publication_date publication title author_fullname #> <chr> <int> <date> <chr> <chr> <chr> #> 1 GCST001… 22747683 2012-06-29 BMC Med Ge… Gene… Eriksson N #> # … with 1 more variable: author_orcid <chr> #>
# Keep all studies except the first studies_ex01[-1]
#> An object of class "studies" #> Slot "studies": #> # A tibble: 1 x 13 #> study_id reported_trait initial_sample_… replication_sam… gxe gxg #> <chr> <chr> <chr> <chr> <lgl> <lgl> #> 1 GCST003… Breast size 33,790 European… NA FALSE FALSE #> # … with 7 more variables: snp_count <int>, qualifier <chr>, imputed <lgl>, #> # pooled <lgl>, study_design_comment <chr>, full_pvalue_set <lgl>, #> # user_requested <lgl> #> #> Slot "genotyping_techs": #> # A tibble: 1 x 2 #> study_id genotyping_technology #> <chr> <chr> #> 1 GCST003985 Genome-wide genotyping array #> #> Slot "platforms": #> # A tibble: 1 x 2 #> study_id manufacturer #> <chr> <chr> #> 1 GCST003985 Illumina #> #> Slot "ancestries": #> # A tibble: 1 x 4 #> study_id ancestry_id type number_of_individuals #> <chr> <int> <chr> <int> #> 1 GCST003985 1 initial 33790 #> #> Slot "ancestral_groups": #> # A tibble: 1 x 3 #> study_id ancestry_id ancestral_group #> <chr> <int> <chr> #> 1 GCST003985 1 European #> #> Slot "countries_of_origin": #> # A tibble: 1 x 5 #> study_id ancestry_id country_name major_area region #> <chr> <int> <chr> <chr> <chr> #> 1 GCST003985 1 NA NA NA #> #> Slot "countries_of_recruitment": #> # A tibble: 1 x 5 #> study_id ancestry_id country_name major_area region #> <chr> <int> <chr> <chr> <chr> #> 1 GCST003985 1 NA NA NA #> #> Slot "publications": #> # A tibble: 1 x 7 #> study_id pubmed_id publication_date publication title author_fullname #> <chr> <int> <date> <chr> <chr> <chr> #> 1 GCST003… 27182965 2016-05-15 Nat Genet Dete… Pickrell JK #> # … with 1 more variable: author_orcid <chr> #>