Searching the NCI GDC allows for complex filtering based on logical operations and simple comparisons. This function facilitates writing such filter expressions in R-like syntax with R code evaluation.
make_filter(expr, available_fields)a filter expression
a character vector of the additional names that will be injected into the filter evaluation environment
a list that represents an R version
of the JSON that will ultimately be used in an
NCI GDC search or other query.
If used with available_fields, "bare" fields that are named in the available_fields character vector can be used in the filter expression without quotes.