Add graph, plot

1 files changed, 16 insertions, 0 deletions

diff --git a/src/cmd/plot/libplot/frame.c b/src/cmd/plot/libplot/frame.c
new file mode 100644
index 00000000..bbc37a17
--- /dev/null
+++ b/src/cmd/plot/libplot/frame.c
@@ -0,0 +1,16 @@
+#include "mplot.h"
+void frame(double xs, double ys, double xf, double yf){
+	register double	osidex, osidey;
+	osidex = e1->sidex;
+	osidey = e1->sidey;
+	e1->left = e0->left + xs * e0->sidex;
+	e1->bottom = e0->bottom + ys * e0->sidey;
+	e1->sidex = (xf-xs)*e0->sidex;
+	e1->sidey = (yf-ys)*e0->sidey;
+	e1->scalex *= (e1->sidex / osidex);
+	e1->scaley *= (e1->sidey / osidey);
+	e1->quantum=e0->quantum/sqrt(e1->scalex*e1->scalex +
+		e1->scaley*e1->scaley);
+	if(e1->quantum < .01)
+		e1->quantum = .01;
+}