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Compute LD for measured SNPs from mixed ethnicity cohorts

Usage

computeLD(
  chr,
  start_bp,
  end_bp,
  pop_wgt_df,
  input_file,
  reference_index_file,
  reference_data_file,
  reference_pop_desc_file,
  af1_cutoff = NULL
)

Arguments

chr

chromosome number

start_bp

start base pair position of prediction window

end_bp

end base pair position of prediction window

pop_wgt_df

R data frame containing population IDs and weights

input_file

file name of GWAS summary statistics data containing rsid, chr, bp, a1, a2, af1, and z

reference_index_file

file name of reference panel index data

reference_data_file

file name of reference panel data

reference_pop_desc_file

file name of reference panel population description data

af1_cutoff

cutoff of reference allele, a1, frequency

Value

R list containing a data frame containing rsid, chr, bp, a1, a2 and af1mix and a correlation matrix