For domain errors, Look at the Dissect tool.
Henry Rich
On 1/6/2021 3:40 AM, Justin Paston-Cooper wrote:
I should add how it works:
On the right, 10^(The position of '.' in the number minus 1)
On the left, remove '.' and parse as number
In the middle, apply x: to both sides and divide.
Also, how can I go about actually debugging domain errors? Both sides
seem to be zero-dimensional.
On Wed, 6 Jan 2021 at 10:20, Justin Paston-Cooper
<paston.coo...@gmail.com> wrote:
Thanks for the suggestion. I've combined Don's idea of using x: and
your idea of removing the point and parsing that to handle all numbers
of digits after the decimal point:
stringToRational =: ((_&".)@(-.&'.') %&:x: 10&^@(<:@# - (i.&'.'))
stringToRational '666.66' should give 333r50.
Sadly this is giving a domain error, even though both sides of the
fork work alone. Could anyone suggest how to fix this?
On Tue, 5 Jan 2021 at 19:14, Jimmy Gauvin <jimmy.gau...@gmail.com> wrote:
IF your strings always have two numbers after the decimal point you could
remove the point before converting to numeric.
NB.Remove decimal point
'.' -.~ each '123.45' ; '1456.12'
┌─────┬──────┐
│12345│145612│
└─────┴──────┘
NB. Convert to numeric
_ ". > '.' -.~ each '123.45' ; '456.12'
12345 45612
NB. type 4 is integer
3!:0 ] _ ". > '.' -.~ each '123.45' ; '456.12'
4
On Tue, Jan 5, 2021 at 10:43 AM Justin Paston-Cooper <
paston.coo...@gmail.com> wrote:
Hello,
I am reading in tab-separated files with readdsv from 'tables/dsv'.
Some columns consist of exact decimal numbers like 6.66. These generally
involve amounts of a decimal currency. These are read in by readdsv as
boxed strings. makenum from 'tables/csv' converts these strings to
floats. I would like these strings to be converted exactly to
rationals. How can I go about this in the easiest and most efficient
way? I could not find information on parsing data types from strings.
Thanks in advance,
Justin
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