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Read Event Files from a BIDS Project

Source: R/all_generic.R
read_events.Rd

This generic function reads and nests event files from a BIDS project. Event files contain timing information about task events, conditions, and responses during functional MRI scans. The function can filter events by subject and task, and returns a nested tibble for easy data manipulation.

Usage

read_events(x, ...)

Arguments

x

The object to read events from (typically a bids_project).

...

Additional arguments passed to methods.

Value

A nested tibble with columns:

  • .task: Task name

  • .run: Run number

  • .subid: Subject ID

  • data: Nested column containing the event data If no matching data is found, returns an empty tibble with appropriate columns.

Examples

# \donttest{
# Create a BIDS project
tryCatch({
  ds001_path <- get_example_bids_dataset("ds001")
  proj <- bids_project(ds001_path)
  
  # Read all event files
  all_events <- read_events(proj)
  
  # Read events for specific subjects
  sub_events <- read_events(proj, subid="0[123]")
  
  # Read events for a specific task
  task_events <- read_events(proj, task="balloonanalogrisktask")
  
  # Combine multiple filters
  filtered_events <- read_events(proj,
                                subid="01",
                                task="balloonanalogrisktask")
  
  # Access nested data
  if (nrow(filtered_events) > 0) {
    first_run <- filtered_events$data[[1]]
    print(head(first_run))
  }
  
  # Clean up
  unlink(ds001_path, recursive=TRUE)
}, error = function(e) {
  message("Example requires internet connection: ", e$message)
})
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#> Rows: 185 Columns: 1
#> ── Column specification ────────────────────────────────────────────────────────
#> Delimiter: " "
#> chr (1): onset	duration	trial_type	cash_demean	control_pumps_demean	explode_...
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#> Rows: 184 Columns: 1
#> ── Column specification ────────────────────────────────────────────────────────
#> Delimiter: " "
#> chr (1): onset	duration	trial_type	cash_demean	control_pumps_demean	explode_...
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#> Rows: 186 Columns: 1
#> ── Column specification ────────────────────────────────────────────────────────
#> Delimiter: " "
#> chr (1): onset	duration	trial_type	cash_demean	control_pumps_demean	explode_...
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#> Rows: 150 Columns: 1
#> ── Column specification ────────────────────────────────────────────────────────
#> Delimiter: " "
#> chr (1): onset	duration	trial_type	cash_demean	control_pumps_demean	explode_...
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#> Rows: 169 Columns: 1
#> ── Column specification ────────────────────────────────────────────────────────
#> Delimiter: " "
#> chr (1): onset	duration	trial_type	cash_demean	control_pumps_demean	explode_...
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#> Rows: 175 Columns: 1
#> ── Column specification ────────────────────────────────────────────────────────
#> Delimiter: " "
#> chr (1): onset	duration	trial_type	cash_demean	control_pumps_demean	explode_...
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#> Rows: 166 Columns: 1
#> ── Column specification ────────────────────────────────────────────────────────
#> Delimiter: " "
#> chr (1): onset	duration	trial_type	cash_demean	control_pumps_demean	explode_...
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#> Rows: 175 Columns: 1
#> ── Column specification ────────────────────────────────────────────────────────
#> Delimiter: " "
#> chr (1): onset	duration	trial_type	cash_demean	control_pumps_demean	explode_...
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#> ℹ Specify the column types or set `show_col_types = FALSE` to quiet this message.
#> Rows: 169 Columns: 1
#> ── Column specification ────────────────────────────────────────────────────────
#> Delimiter: " "
#> chr (1): onset	duration	trial_type	cash_demean	control_pumps_demean	explode_...
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#> ℹ Use `spec()` to retrieve the full column specification for this data.
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#> Rows: 135 Columns: 1
#> ── Column specification ────────────────────────────────────────────────────────
#> Delimiter: " "
#> chr (1): onset	duration	trial_type	cash_demean	control_pumps_demean	explode_...
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#> ℹ Use `spec()` to retrieve the full column specification for this data.
#> ℹ Specify the column types or set `show_col_types = FALSE` to quiet this message.
#> Rows: 138 Columns: 1
#> ── Column specification ────────────────────────────────────────────────────────
#> Delimiter: " "
#> chr (1): onset	duration	trial_type	cash_demean	control_pumps_demean	explode_...
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#> ℹ Use `spec()` to retrieve the full column specification for this data.
#> ℹ Specify the column types or set `show_col_types = FALSE` to quiet this message.
#> Rows: 146 Columns: 1
#> ── Column specification ────────────────────────────────────────────────────────
#> Delimiter: " "
#> chr (1): onset	duration	trial_type	cash_demean	control_pumps_demean	explode_...
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#> ℹ Use `spec()` to retrieve the full column specification for this data.
#> ℹ Specify the column types or set `show_col_types = FALSE` to quiet this message.
#> Rows: 177 Columns: 1
#> ── Column specification ────────────────────────────────────────────────────────
#> Delimiter: " "
#> chr (1): onset	duration	trial_type	cash_demean	control_pumps_demean	explode_...
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#> ℹ Use `spec()` to retrieve the full column specification for this data.
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#> Rows: 187 Columns: 1
#> ── Column specification ────────────────────────────────────────────────────────
#> Delimiter: " "
#> chr (1): onset	duration	trial_type	cash_demean	control_pumps_demean	explode_...
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#> ℹ Use `spec()` to retrieve the full column specification for this data.
#> ℹ Specify the column types or set `show_col_types = FALSE` to quiet this message.
#> Rows: 172 Columns: 1
#> ── Column specification ────────────────────────────────────────────────────────
#> Delimiter: " "
#> chr (1): onset	duration	trial_type	cash_demean	control_pumps_demean	explode_...
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#> ℹ Use `spec()` to retrieve the full column specification for this data.
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#> Rows: 170 Columns: 1
#> ── Column specification ────────────────────────────────────────────────────────
#> Delimiter: " "
#> chr (1): onset	duration	trial_type	cash_demean	control_pumps_demean	explode_...
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#> ℹ Use `spec()` to retrieve the full column specification for this data.
#> ℹ Specify the column types or set `show_col_types = FALSE` to quiet this message.
#> Rows: 162 Columns: 1
#> ── Column specification ────────────────────────────────────────────────────────
#> Delimiter: " "
#> chr (1): onset	duration	trial_type	cash_demean	control_pumps_demean	explode_...
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#> ℹ Use `spec()` to retrieve the full column specification for this data.
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#> Rows: 160 Columns: 1
#> ── Column specification ────────────────────────────────────────────────────────
#> Delimiter: " "
#> chr (1): onset	duration	trial_type	cash_demean	control_pumps_demean	explode_...
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#> Rows: 163 Columns: 1
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#> Delimiter: " "
#> chr (1): onset	duration	trial_type	cash_demean	control_pumps_demean	explode_...
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#> ℹ Use `spec()` to retrieve the full column specification for this data.
#> ℹ Specify the column types or set `show_col_types = FALSE` to quiet this message.
#> Rows: 166 Columns: 1
#> ── Column specification ────────────────────────────────────────────────────────
#> Delimiter: " "
#> chr (1): onset	duration	trial_type	cash_demean	control_pumps_demean	explode_...
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#> ℹ Use `spec()` to retrieve the full column specification for this data.
#> ℹ Specify the column types or set `show_col_types = FALSE` to quiet this message.
#> Rows: 165 Columns: 1
#> ── Column specification ────────────────────────────────────────────────────────
#> Delimiter: " "
#> chr (1): onset	duration	trial_type	cash_demean	control_pumps_demean	explode_...
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#> ℹ Use `spec()` to retrieve the full column specification for this data.
#> ℹ Specify the column types or set `show_col_types = FALSE` to quiet this message.
#> Rows: 172 Columns: 1
#> ── Column specification ────────────────────────────────────────────────────────
#> Delimiter: " "
#> chr (1): onset	duration	trial_type	cash_demean	control_pumps_demean	explode_...
#> 
#> ℹ Use `spec()` to retrieve the full column specification for this data.
#> ℹ Specify the column types or set `show_col_types = FALSE` to quiet this message.
#> Rows: 167 Columns: 1
#> ── Column specification ────────────────────────────────────────────────────────
#> Delimiter: " "
#> chr (1): onset	duration	trial_type	cash_demean	control_pumps_demean	explode_...
#> 
#> ℹ Use `spec()` to retrieve the full column specification for this data.
#> ℹ Specify the column types or set `show_col_types = FALSE` to quiet this message.
#> Rows: 158 Columns: 1
#> ── Column specification ────────────────────────────────────────────────────────
#> Delimiter: " "
#> chr (1): onset	duration	trial_type	cash_demean	control_pumps_demean	explode_...
#> 
#> ℹ Use `spec()` to retrieve the full column specification for this data.
#> ℹ Specify the column types or set `show_col_types = FALSE` to quiet this message.
#> Rows: 175 Columns: 1
#> ── Column specification ────────────────────────────────────────────────────────
#> Delimiter: " "
#> chr (1): onset	duration	trial_type	cash_demean	control_pumps_demean	explode_...
#> 
#> ℹ Use `spec()` to retrieve the full column specification for this data.
#> ℹ Specify the column types or set `show_col_types = FALSE` to quiet this message.
#> Rows: 173 Columns: 1
#> ── Column specification ────────────────────────────────────────────────────────
#> Delimiter: " "
#> chr (1): onset	duration	trial_type	cash_demean	control_pumps_demean	explode_...
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#> ℹ Use `spec()` to retrieve the full column specification for this data.
#> ℹ Specify the column types or set `show_col_types = FALSE` to quiet this message.
#> Rows: 173 Columns: 1
#> ── Column specification ────────────────────────────────────────────────────────
#> Delimiter: " "
#> chr (1): onset	duration	trial_type	cash_demean	control_pumps_demean	explode_...
#> 
#> ℹ Use `spec()` to retrieve the full column specification for this data.
#> ℹ Specify the column types or set `show_col_types = FALSE` to quiet this message.
#> Rows: 150 Columns: 1
#> ── Column specification ────────────────────────────────────────────────────────
#> Delimiter: " "
#> chr (1): onset	duration	trial_type	cash_demean	control_pumps_demean	explode_...
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#> ℹ Use `spec()` to retrieve the full column specification for this data.
#> ℹ Specify the column types or set `show_col_types = FALSE` to quiet this message.
#> Rows: 153 Columns: 1
#> ── Column specification ────────────────────────────────────────────────────────
#> Delimiter: " "
#> chr (1): onset	duration	trial_type	cash_demean	control_pumps_demean	explode_...
#> 
#> ℹ Use `spec()` to retrieve the full column specification for this data.
#> ℹ Specify the column types or set `show_col_types = FALSE` to quiet this message.
#> Rows: 168 Columns: 1
#> ── Column specification ────────────────────────────────────────────────────────
#> Delimiter: " "
#> chr (1): onset	duration	trial_type	cash_demean	control_pumps_demean	explode_...
#> 
#> ℹ Use `spec()` to retrieve the full column specification for this data.
#> ℹ Specify the column types or set `show_col_types = FALSE` to quiet this message.
#> Rows: 149 Columns: 1
#> ── Column specification ────────────────────────────────────────────────────────
#> Delimiter: " "
#> chr (1): onset	duration	trial_type	cash_demean	control_pumps_demean	explode_...
#> 
#> ℹ Use `spec()` to retrieve the full column specification for this data.
#> ℹ Specify the column types or set `show_col_types = FALSE` to quiet this message.
#> Rows: 156 Columns: 1
#> ── Column specification ────────────────────────────────────────────────────────
#> Delimiter: " "
#> chr (1): onset	duration	trial_type	cash_demean	control_pumps_demean	explode_...
#> 
#> ℹ Use `spec()` to retrieve the full column specification for this data.
#> ℹ Specify the column types or set `show_col_types = FALSE` to quiet this message.
#> Rows: 148 Columns: 1
#> ── Column specification ────────────────────────────────────────────────────────
#> Delimiter: " "
#> chr (1): onset	duration	trial_type	cash_demean	control_pumps_demean	explode_...
#> 
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#> ℹ Specify the column types or set `show_col_types = FALSE` to quiet this message.
#> Rows: 151 Columns: 1
#> ── Column specification ────────────────────────────────────────────────────────
#> Delimiter: " "
#> chr (1): onset	duration	trial_type	cash_demean	control_pumps_demean	explode_...
#> 
#> ℹ Use `spec()` to retrieve the full column specification for this data.
#> ℹ Specify the column types or set `show_col_types = FALSE` to quiet this message.
#> Rows: 172 Columns: 1
#> ── Column specification ────────────────────────────────────────────────────────
#> Delimiter: " "
#> chr (1): onset	duration	trial_type	cash_demean	control_pumps_demean	explode_...
#> 
#> ℹ Use `spec()` to retrieve the full column specification for this data.
#> ℹ Specify the column types or set `show_col_types = FALSE` to quiet this message.
#> Rows: 162 Columns: 1
#> ── Column specification ────────────────────────────────────────────────────────
#> Delimiter: " "
#> chr (1): onset	duration	trial_type	cash_demean	control_pumps_demean	explode_...
#> 
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#> ℹ Specify the column types or set `show_col_types = FALSE` to quiet this message.
#> Rows: 168 Columns: 1
#> ── Column specification ────────────────────────────────────────────────────────
#> Delimiter: " "
#> chr (1): onset	duration	trial_type	cash_demean	control_pumps_demean	explode_...
#> 
#> ℹ Use `spec()` to retrieve the full column specification for this data.
#> ℹ Specify the column types or set `show_col_types = FALSE` to quiet this message.
#> Rows: 173 Columns: 1
#> ── Column specification ────────────────────────────────────────────────────────
#> Delimiter: " "
#> chr (1): onset	duration	trial_type	cash_demean	control_pumps_demean	explode_...
#> 
#> ℹ Use `spec()` to retrieve the full column specification for this data.
#> ℹ Specify the column types or set `show_col_types = FALSE` to quiet this message.
#> Rows: 162 Columns: 1
#> ── Column specification ────────────────────────────────────────────────────────
#> Delimiter: " "
#> chr (1): onset	duration	trial_type	cash_demean	control_pumps_demean	explode_...
#> 
#> ℹ Use `spec()` to retrieve the full column specification for this data.
#> ℹ Specify the column types or set `show_col_types = FALSE` to quiet this message.
#> Rows: 149 Columns: 1
#> ── Column specification ────────────────────────────────────────────────────────
#> Delimiter: " "
#> chr (1): onset	duration	trial_type	cash_demean	control_pumps_demean	explode_...
#> 
#> ℹ Use `spec()` to retrieve the full column specification for this data.
#> ℹ Specify the column types or set `show_col_types = FALSE` to quiet this message.
#> Rows: 127 Columns: 1
#> ── Column specification ────────────────────────────────────────────────────────
#> Delimiter: " "
#> chr (1): onset	duration	trial_type	cash_demean	control_pumps_demean	explode_...
#> 
#> ℹ Use `spec()` to retrieve the full column specification for this data.
#> ℹ Specify the column types or set `show_col_types = FALSE` to quiet this message.
#> Rows: 135 Columns: 1
#> ── Column specification ────────────────────────────────────────────────────────
#> Delimiter: " "
#> chr (1): onset	duration	trial_type	cash_demean	control_pumps_demean	explode_...
#> 
#> ℹ Use `spec()` to retrieve the full column specification for this data.
#> ℹ Specify the column types or set `show_col_types = FALSE` to quiet this message.
#> Rows: 121 Columns: 1
#> ── Column specification ────────────────────────────────────────────────────────
#> Delimiter: " "
#> chr (1): onset	duration	trial_type	cash_demean	control_pumps_demean	explode_...
#> 
#> ℹ Use `spec()` to retrieve the full column specification for this data.
#> ℹ Specify the column types or set `show_col_types = FALSE` to quiet this message.
#> Rows: 141 Columns: 1
#> ── Column specification ────────────────────────────────────────────────────────
#> Delimiter: " "
#> chr (1): onset	duration	trial_type	cash_demean	control_pumps_demean	explode_...
#> 
#> ℹ Use `spec()` to retrieve the full column specification for this data.
#> ℹ Specify the column types or set `show_col_types = FALSE` to quiet this message.
#> Rows: 157 Columns: 1
#> ── Column specification ────────────────────────────────────────────────────────
#> Delimiter: " "
#> chr (1): onset	duration	trial_type	cash_demean	control_pumps_demean	explode_...
#> 
#> ℹ Use `spec()` to retrieve the full column specification for this data.
#> ℹ Specify the column types or set `show_col_types = FALSE` to quiet this message.
#> Rows: 158 Columns: 1
#> ── Column specification ────────────────────────────────────────────────────────
#> Delimiter: " "
#> chr (1): onset	duration	trial_type	cash_demean	control_pumps_demean	explode_...
#> 
#> ℹ Use `spec()` to retrieve the full column specification for this data.
#> ℹ Specify the column types or set `show_col_types = FALSE` to quiet this message.
#> Rows: 156 Columns: 1
#> ── Column specification ────────────────────────────────────────────────────────
#> Delimiter: " "
#> chr (1): onset	duration	trial_type	cash_demean	control_pumps_demean	explode_...
#> 
#> ℹ Use `spec()` to retrieve the full column specification for this data.
#> ℹ Specify the column types or set `show_col_types = FALSE` to quiet this message.
#> Rows: 149 Columns: 1
#> ── Column specification ────────────────────────────────────────────────────────
#> Delimiter: " "
#> chr (1): onset	duration	trial_type	cash_demean	control_pumps_demean	explode_...
#> 
#> ℹ Use `spec()` to retrieve the full column specification for this data.
#> ℹ Specify the column types or set `show_col_types = FALSE` to quiet this message.
#> # A tibble: 6 × 2
#>   onset\tduration\ttrial_type\tcash_demean\tcontrol_pumps_demean\texplod…¹ .file
#>   <chr>                                                                    <chr>
#> 1 "0.061\t0.772\tpumps_demean\tn/a\tn/a\tn/a\t-2.000\t2.420"               /tmp…
#> 2 "4.958\t0.772\tpumps_demean\tn/a\tn/a\tn/a\t-1.000\t0.578"               /tmp…
#> 3 "7.179\t0.772\tpumps_demean\tn/a\tn/a\tn/a\t0.000\t0.766"                /tmp…
#> 4 "10.416\t0.772\tpumps_demean\tn/a\tn/a\tn/a\t1.000\t0.840"               /tmp…
#> 5 "13.419\t0.772\tpumps_demean\tn/a\tn/a\tn/a\t2.000\t1.462"               /tmp…
#> 6 "16.754\t0.772\texplode_demean\tn/a\tn/a\t1.700\tn/a\tn/a"               /tmp…
#> # ℹ abbreviated name:
#> #   ¹​`onset\tduration\ttrial_type\tcash_demean\tcontrol_pumps_demean\texplode_demean\tpumps_demean\tresponse_time`
# }