Description
Read and write data frames from and to a fast-storage ('fst') file.Allows for compression and (file level) random access of stored data, even for compressed datasets.Multiple threads are used to obtain high (de-)serialization speeds but all background threads arere-joined before 'write_fst' and 'read_fst' return (reads and writes are stable).When using a 'data.table' object for 'x', the key (if any) is preserved,allowing storage of sorted data.Methods 'read_fst' and 'write_fst' are equivalent to 'read.fst' and 'write.fst' (but theformer syntax is preferred).
Usage
Arguments
x | a data frame to write to disk Sketchup pro 2014 intelk download free. |
path | path to fst file |
compress | value in the range 0 to 100, indicating the amount of compression to use.Lower values mean larger file sizes. The default compression is set to 50. |
uniform_encoding | If 'TRUE', all character vectors will be assumed to have elements with equal encoding.The encoding (latin1, UTF8 or native) of the first non-NA element will used as encoding for the whole column.This will be a correct assumption for most use cases.If 'uniform.encoding' is set to 'FALSE', no such assumption will be made and all elements will be convertedto the same encoding. The latter is a relatively expensive operation and will reduce write performance forcharacter columns. |
columns | Column names to read. The default is to read all columns. |
from | Read data starting from this row number. |
to | Read data up until this row number. The default is to read to the last row of the stored dataset. |
as.data.table | If TRUE, the result will be returned as a data.table object. Any keys set ondataset x before writing will be retained. This allows for storage of sorted datasets. This optionrequires data.table package to be installed. |
old_format | must be FALSE, the old fst file format is deprecated and can only be read andconverted with fst package versions 0.8.0 to 0.8.10. |
Value
- Description: FST file is a PLINK Fixation Index Report. PLINK is a free, open-source whole genome association analysis toolset, designed to perform a range of basic, large-scale analyses in a computationally efficient manner.
- Keep getting message 'iosfs: failed to rename temporary fst file' Support. Everytime i start dolphin, i get this message and i have to press 'ok' about 15 times before i get the option to 'ignore for this session'. Does anyone know what this means and if there's a solution to it?
'read_fst' returns a data frame with the selected columns and rows. 'write_fst'writes 'x' to a 'fst' file and invisibly returns 'x' (so you can use this function in a pipeline).
Examples
Example output
Looking for online definition of FST or what FST stands for? FST is listed in the World's largest and most authoritative dictionary database of abbreviations and acronyms The Free Dictionary. The shell-level FST operations typically read one or more input binary FST files, call internally the corresponding C operation and then write an output binary FST file. If the output file is omitted, standard output is used. If the input file is also omitted (unary case) or is '-', then standard input is used. Specifically, they have the form. Julia bindings for the fst format. Contribute to xiaodaigh/FstFileFormat.jl development by creating an account on GitHub.
Description
Read and write data frames from and to a fast-storage ('fst') file.Allows for compression and (file level) random access of stored data, even for compressed datasets.Multiple threads are used to obtain high (de-)serialization speeds but all background threads arere-joined before 'write_fst' and 'read_fst' return (reads and writes are stable).When using a 'data.table' object for 'x', the key (if any) is preserved,allowing storage of sorted data.Methods 'read_fst' and 'write_fst' are equivalent to 'read.fst' and 'write.fst' (but theformer syntax is preferred).
Usage
Arguments
x | a data frame to write to disk |
path | path to fst file |
compress | value in the range 0 to 100, indicating the amount of compression to use.Lower values mean larger file sizes. The default compression is set to 50. |
uniform_encoding | If 'TRUE', all character vectors will be assumed to have elements with equal encoding.The encoding (latin1, UTF8 or native) of the first non-NA element will used as encoding for the whole column.This will be a correct assumption for most use cases.If 'uniform.encoding' is set to 'FALSE', no such assumption will be made and all elements will be convertedto the same encoding. The latter is a relatively expensive operation and will reduce write performance forcharacter columns. |
columns | Column names to read. The default is to read all columns. |
from | Read data starting from this row number. |
to | Macos 10 14 mojave 2018 requirements. Read data up until this row number. The default is to read to the last row of the stored dataset. |
as.data.table | If TRUE, the result will be returned as a data.table object. Any keys set ondataset x before writing will be retained. This allows for storage of sorted datasets. This optionrequires data.table package to be installed. |
old_format | must be FALSE, the old fst file format is deprecated and can only be read andconverted with fst package versions 0.8.0 to 0.8.10. |
Value
'read_fst' returns a data frame with the selected columns and rows. 'write_fst'writes 'x' to a 'fst' file and invisibly returns 'x' (so you can use this function in a pipeline).