Single Precision (4 byte) floats with readBin
--- Sundar Dorai-Raj <sundar.dorai-raj at pdf.com> wrote:
Peter Lauren said the following on 9/27/2006 3:11 PM:
I would like to use readBin to read a binary data file. Most of the data is 4-byte floating point
but,
for some reason, only double precision appears to
be
offered. I tried fVariable=readBin(iFile,what=single()); and got 35.87879 which looks believable except
that
the correct value is 3.030303. I then tried fVariable=readBin(iFile,what=single(),4); and got [1] 3.831111e+10 6.657199e+10 -5.592394e+29 -5.592397e+29 For the second call, there were two more single precision floats of value 3.030303 followed by two more with values 40.46 and 0.00 respectively. Is there any way around this problem other than to make the input data double (which I definitely do
not
want to do)? Many thanks in advance, Peter.
______________________________________________ R-help at stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. Hi, Peter, I believe you can use readBin(file, double(), size = 4)
It worked! Thanks very much. Peter.