Added: Difficulty zoom

rslib/src/stats/graphs/eases.rs

@@ -17,7 +17,7 @@ impl GraphsContext {
             if let Some(state) = card.memory_state {
                 *difficulty
                     .eases
-                    .entry(percent_to_bin(state.difficulty() * 100.0))
+                    .entry(percent_to_bin(state.difficulty() * 100.0, 1))
                     .or_insert_with(Default::default) += 1;
                 difficulty_values.push(state.difficulty());
             } else if matches!(card.ctype, CardType::Review | CardType::Relearn) {
@@ -51,11 +51,11 @@ fn median(data: &mut [f32]) -> f32 {
 }
 
 /// Bins the number into a bin of 0, 5, .. 95
-pub(super) fn percent_to_bin(x: f32) -> u32 {
+pub(super) fn percent_to_bin(x: f32, bin_size: u32) -> u32 {
     if x == 100.0 {
-        95
+        100 - bin_size
     } else {
-        ((x / 5.0).floor() * 5.0) as u32
+        ((x / bin_size as f32).floor() * bin_size as f32) as u32
     }
 }
 
@@ -65,11 +65,11 @@ mod tests {
 
     #[test]
     fn bins() {
-        assert_eq!(percent_to_bin(0.0), 0);
-        assert_eq!(percent_to_bin(4.9), 0);
-        assert_eq!(percent_to_bin(5.0), 5);
-        assert_eq!(percent_to_bin(9.9), 5);
-        assert_eq!(percent_to_bin(99.9), 95);
-        assert_eq!(percent_to_bin(100.0), 95);
+        assert_eq!(percent_to_bin(0.0, 5), 0);
+        assert_eq!(percent_to_bin(4.9, 5), 0);
+        assert_eq!(percent_to_bin(5.0, 5), 5);
+        assert_eq!(percent_to_bin(9.9, 5), 5);
+        assert_eq!(percent_to_bin(99.9, 5), 95);
+        assert_eq!(percent_to_bin(100.0, 5), 95);
     }
 }

rslib/src/stats/graphs/retrievability.rs

@@ -39,7 +39,7 @@ impl GraphsContext {
 
                 *retrievability
                     .retrievability
-                    .entry(percent_to_bin(r * 100.0))
+                    .entry(percent_to_bin(r * 100.0, 1))
                     .or_insert_with(Default::default) += 1;
                 retrievability.sum_by_card += r;
                 card_with_retrievability_count += 1;

ts/routes/graphs/DifficultyGraph.svelte

@@ -7,13 +7,14 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
     import * as tr from "@generated/ftl";
     import { createEventDispatcher } from "svelte";
 
-    import { gatherData, prepareData } from "./difficulty";
+    import { DifficultyRange, gatherData, prepareData } from "./difficulty";
     import Graph from "./Graph.svelte";
     import type { GraphPrefs } from "./graph-helpers";
     import type { SearchEventMap, TableDatum } from "./graph-helpers";
     import type { HistogramData } from "./histogram-graph";
     import HistogramGraph from "./HistogramGraph.svelte";
     import TableData from "./TableData.svelte";
+    import InputBox from "./InputBox.svelte";
 
     export let sourceData: GraphsResponse | null = null;
     export let prefs: GraphPrefs;
@@ -22,12 +23,24 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
 
     let histogramData: HistogramData | null = null;
     let tableData: TableDatum[] = [];
+    let range = DifficultyRange.All;
+
+    $: percentile = {
+        [DifficultyRange.Percentile50]: 0.5,
+        [DifficultyRange.Percentile95]: 0.95,
+        [DifficultyRange.All]: 1,
+    }[range];
 
     $: if (sourceData) {
+        const data = gatherData(sourceData);
+
+        console.log(data.eases);
+
         [histogramData, tableData] = prepareData(
-            gatherData(sourceData),
+            data,
             dispatch,
             $prefs.browserLinksSupported,
+            1 - percentile,
         );
     }
 
@@ -37,6 +50,29 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
 
 {#if sourceData?.fsrs}
     <Graph {title} {subtitle}>
+        <InputBox>
+            <label>
+                <input
+                    type="radio"
+                    bind:group={range}
+                    value={DifficultyRange.Percentile50}
+                />
+                50%
+            </label>
+            <label>
+                <input
+                    type="radio"
+                    bind:group={range}
+                    value={DifficultyRange.Percentile95}
+                />
+                95%
+            </label>
+            <label>
+                <input type="radio" bind:group={range} value={DifficultyRange.All} />
+                {tr.statisticsRangeAllTime()}
+            </label>
+        </InputBox>
+
         <HistogramGraph data={histogramData} />
 
         <TableData {tableData} />

ts/routes/graphs/difficulty.ts

@@ -9,12 +9,18 @@ import type { GraphsResponse } from "@generated/anki/stats_pb";
 import * as tr from "@generated/ftl";
 import { localizedNumber } from "@tslib/i18n";
 import type { Bin, ScaleLinear } from "d3";
-import { bin, interpolateRdYlGn, scaleLinear, scaleSequential, sum } from "d3";
+import { bin, interpolateRdYlGn, quantile, scaleLinear, scaleSequential, sum } from "d3";
 
 import type { SearchDispatch, TableDatum } from "./graph-helpers";
 import { getNumericMapBinValue, numericMap } from "./graph-helpers";
 import type { HistogramData } from "./histogram-graph";
 
+export enum DifficultyRange {
+    All = 0,
+    Percentile50 = 1,
+    Percentile95 = 2,
+}
+
 export interface GraphData {
     eases: Map<number, number>;
     average: number;
@@ -61,14 +67,15 @@ export function prepareData(
     data: GraphData,
     dispatch: SearchDispatch,
     browserLinksSupported: boolean,
+    lowerQuantile: number = 0
 ): [HistogramData | null, TableDatum[]] {
     // get min/max
     const allEases = data.eases;
     if (!allEases.size) {
         return [null, []];
     }
-    const xMin = 0;
-    const xMax = 100;
+    const xMin = quantile(Array.from(allEases.keys()), lowerQuantile) ?? 0;
+    const xMax = 100
     const desiredBars = 20;
 
     const [scale, ticks] = getAdjustedScaleAndTicks(xMin, xMax, desiredBars);