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Added 'sgn' function

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bakk 2022-01-20 21:18:32 +01:00 committed by PaddiM8
parent 2bda63b058
commit 11869d1fef
1 changed files with 11 additions and 0 deletions
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11
kalk/src/prelude/mod.rs
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@ -77,6 +77,7 @@ lazy_static! {
m.insert("log", (UnaryFuncInfo(log, Other), "")); m.insert("log", (UnaryFuncInfo(log, Other), ""));
m.insert("Re", (UnaryFuncInfo(re, Other), "")); m.insert("Re", (UnaryFuncInfo(re, Other), ""));
m.insert("round", (UnaryFuncInfo(round, Other), "")); m.insert("round", (UnaryFuncInfo(round, Other), ""));
m.insert("sgn", (UnaryFuncInfo(sgn, Other), ""));
m.insert("sqrt", (UnaryFuncInfo(sqrt, Other), "")); m.insert("sqrt", (UnaryFuncInfo(sqrt, Other), ""));
m.insert("√", (UnaryFuncInfo(sqrt, Other), "")); m.insert("√", (UnaryFuncInfo(sqrt, Other), ""));
m.insert("transpose", (UnaryFuncInfo(transpose, Other), "")); m.insert("transpose", (UnaryFuncInfo(transpose, Other), ""));
@ -783,6 +784,16 @@ pub mod funcs {
) )
} }
pub fn sgn(x: KalkValue) -> KalkValue {
if x.has_imaginary() {
x.clone().div_without_unit(&abs(x))
} else {
let (real, _, unit) = as_number_or_return!(x);
KalkValue::Number(real.signum(), float!(0), unit)
}
}
pub fn sqrt(x: KalkValue) -> KalkValue { pub fn sqrt(x: KalkValue) -> KalkValue {
let (real, imaginary, unit) = as_number_or_return!(x.clone()); let (real, imaginary, unit) = as_number_or_return!(x.clone());
if x.has_imaginary() { if x.has_imaginary() {