From d125664e5768748217052e92741fafca494d8e62 Mon Sep 17 00:00:00 2001
From: Ozzie Gooen <ozzieagooen@gmail.com>
Date: Mon, 6 Jun 2022 12:25:09 -0700
Subject: [PATCH] Added stdev to table of stats, when needed

---
 packages/components/src/components/DistributionChart.tsx | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/packages/components/src/components/DistributionChart.tsx b/packages/components/src/components/DistributionChart.tsx
index 18dd2a3e..276e73d5 100644
--- a/packages/components/src/components/DistributionChart.tsx
+++ b/packages/components/src/components/DistributionChart.tsx
@@ -153,6 +153,7 @@ type SummaryTableProps = {
 
 const SummaryTable: React.FC<SummaryTableProps> = ({ distribution }) => {
   const mean = distribution.mean();
+  const stdev = distribution.stdev();
   const p5 = distribution.inv(0.05);
   const p10 = distribution.inv(0.1);
   const p25 = distribution.inv(0.25);
@@ -161,6 +162,9 @@ const SummaryTable: React.FC<SummaryTableProps> = ({ distribution }) => {
   const p90 = distribution.inv(0.9);
   const p95 = distribution.inv(0.95);
 
+  const hasResult = (x: result<number, distributionError>): boolean =>
+    x.tag === "Ok";
+
   const unwrapResult = (
     x: result<number, distributionError>
   ): React.ReactNode => {
@@ -180,6 +184,7 @@ const SummaryTable: React.FC<SummaryTableProps> = ({ distribution }) => {
       <thead className="bg-slate-50">
         <tr>
           <TableHeadCell>{"Mean"}</TableHeadCell>
+          {hasResult(stdev) && <TableHeadCell>{"Stdev"}</TableHeadCell>}
           <TableHeadCell>{"5%"}</TableHeadCell>
           <TableHeadCell>{"10%"}</TableHeadCell>
           <TableHeadCell>{"25%"}</TableHeadCell>
@@ -192,6 +197,7 @@ const SummaryTable: React.FC<SummaryTableProps> = ({ distribution }) => {
       <tbody>
         <tr>
           <Cell>{unwrapResult(mean)}</Cell>
+          {hasResult(stdev) && <Cell>{unwrapResult(stdev)}</Cell>}
           <Cell>{unwrapResult(p5)}</Cell>
           <Cell>{unwrapResult(p10)}</Cell>
           <Cell>{unwrapResult(p25)}</Cell>