readBrukerFlexData: double2singlePrecision – R documentation

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double2singlePrecision

Converts double to single precision.

Description

This function simulates the conversion of floating point numbers from double precision (64bit, R: double(), C: double) to single precision (32bit, R: none, C: float). It follows IEEE 754 standard.

Usage

.double2singlePrecision(x)

Arguments

`x`	`double`, numeric value which should reduce from double precision to single precision.

Details

The same could be done in C by using casts:

double precision32(double value) {
  float x=value;
  return (double)x;
}

Value

double (in single precision).

References

IEEE 754 standard: http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=30711&filter=AND(p_Publication_Number:2355)

Examples

## load library
library("readBrukerFlexData")

## show more details
oldDigits <- options()$digits
options(digits=22)

## a test number
num <- 1/3

num
readBrukerFlexData:::.double2singlePrecision(num)

## reset digits option
options(digits=oldDigits)

readBrukerFlexData

Reads Mass Spectrometry Data in Bruker *flex Format

v1.8.5

GPL (>= 3)

Authors

Sebastian Gibb [aut, cre]

Initial release

2017-04-22