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/*
This reads a file with units defined in a special line that begins
with #!
A delimiter may be passed in as either a string or a regular expression.
By default, this splits on whitespace.
This function returns a two-dimensional array, with each row being
one line from the file, with units multiplied in.
This may be used with a text file like:
https://frinklang.org/unittable.txt
Also note that if your data file contains the units of measure with each
column, like "3 m/s", then this whole file becomes totally irrelevant and
you can parse the fields using Frink's "eval" statement with almost zero
work.
*/
parseFileWithUnits[filename, delimiter = %r/\s+/] :=
{
result = new array
unitArray = undef
LINE:
for line = lines["file:$filename"]
{
Lines beginning with #! contain units
if [units] = line =~ %r/^\s*#!\s*(.*)/
{
unitArray = eval[split[delimiter, units]]
next
}
Other lines beginning with # are comments
if (line =~ %r/^\s*#/)
next
nums = eval[split[delimiter, line]]
if (unitArray != undef)
nums = multiplyVector[unitArray, nums]
result.push[nums];
}
return result
}
// Multiply two vectors and return the result.
multiplyVector[a1, a2] :=
{
u = min[length[a1], length[a2]]
res = new array
for c = 0 to u-1
res@c = a1@c * a2@c
return res
}
Download or view unittable.frink in plain text format
This is a program written in the programming language Frink.
For more information, view the Frink
Documentation or see More Sample Frink Programs.
Alan Eliasen was born 20217 days, 15 hours, 28 minutes ago.