diff --git a/plot.ts b/plot.ts
index dd4430c..79e5e36 100644
--- a/plot.ts
+++ b/plot.ts
@@ -6,4 +6,10 @@ export const document = new DOMParser().parseFromString(
 
 export const plot = (data) => {
     return Plot.line(data, {x: "x", y: "y"}).plot({y: {grid: true}, document})
+}
+
+export const plotxy = (xmin, xmax, step, y) => {
+  const x = Array.from({length: (xmax - xmin)/step}, (_, i) => (i - xmin) * step)
+  const data = x.map(x => ({x, y: y(x)}))
+  return Plot.line(data, {x: "x", y: "y"}).plot({y: {grid: true}, document})
 }
\ No newline at end of file