ref: b479ec0292521b730c716bd7d07b16514178932a
dir: /fplot-abs/
diff -r 82ca4d784349 sys/src/cmd/fplot.c
--- a/sys/src/cmd/fplot.c Sun Jul 01 23:35:23 2018 -0400
+++ b/sys/src/cmd/fplot.c Thu Jul 05 04:41:48 2018 +0200
@@ -61,6 +61,7 @@
void oexp(void) { *sp = exp(*sp); }
void olog(void) { *sp = log10(*sp); }
void oln(void) { *sp = log(*sp); }
+void oabs(void) { *sp = fabs(*sp); }
struct Operator {
char *s;
@@ -85,6 +86,7 @@
"exp", OUNARY, 0, 300, oexp,
"log", OUNARY, 0, 300, olog,
"ln", OUNARY, 0, 300, oln,
+ "abs", OUNARY, 0, 300, oabs,
};
struct Constant {