DOC-4241 added t-digest examples (#3123)

Author: andy-stark-redis

doctests/tdigest_tutorial_test.go

@@ -0,0 +1,251 @@
+// EXAMPLE: tdigest_tutorial
+// HIDE_START
+package example_commands_test
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/redis/go-redis/v9"
+)
+
+// HIDE_END
+
+func ExampleClient_tdigstart() {
+	ctx := context.Background()
+
+	rdb := redis.NewClient(&redis.Options{
+		Addr:     "localhost:6379",
+		Password: "", // no password docs
+		DB:       0,  // use default DB
+	})
+
+	// REMOVE_START
+	rdb.Del(ctx, "racer_ages", "bikes:sales")
+	// REMOVE_END
+
+	// STEP_START tdig_start
+	res1, err := rdb.TDigestCreate(ctx, "bikes:sales").Result()
+
+	if err != nil {
+		panic(err)
+	}
+
+	fmt.Println(res1) // >>> OK
+
+	res2, err := rdb.TDigestAdd(ctx, "bikes:sales", 21).Result()
+
+	if err != nil {
+		panic(err)
+	}
+
+	fmt.Println(res2) // >>> OK
+
+	res3, err := rdb.TDigestAdd(ctx, "bikes:sales",
+		150, 95, 75, 34,
+	).Result()
+
+	if err != nil {
+		panic(err)
+	}
+
+	fmt.Println(res3) // >>> OK
+
+	// STEP_END
+
+	// Output:
+	// OK
+	// OK
+	// OK
+}
+
+func ExampleClient_tdigcdf() {
+	ctx := context.Background()
+
+	rdb := redis.NewClient(&redis.Options{
+		Addr:     "localhost:6379",
+		Password: "", // no password docs
+		DB:       0,  // use default DB
+	})
+
+	// REMOVE_START
+	rdb.Del(ctx, "racer_ages", "bikes:sales")
+	// REMOVE_END
+
+	// STEP_START tdig_cdf
+	res4, err := rdb.TDigestCreate(ctx, "racer_ages").Result()
+
+	if err != nil {
+		panic(err)
+	}
+
+	fmt.Println(res4) // >>> OK
+
+	res5, err := rdb.TDigestAdd(ctx, "racer_ages",
+		45.88, 44.2, 58.03, 19.76, 39.84, 69.28,
+		50.97, 25.41, 19.27, 85.71, 42.63,
+	).Result()
+
+	if err != nil {
+		panic(err)
+	}
+
+	fmt.Println(res5) // >>> OK
+
+	res6, err := rdb.TDigestRank(ctx, "racer_ages", 50).Result()
+
+	if err != nil {
+		panic(err)
+	}
+
+	fmt.Println(res6) // >>> [7]
+
+	res7, err := rdb.TDigestRank(ctx, "racer_ages", 50, 40).Result()
+
+	if err != nil {
+		panic(err)
+	}
+
+	fmt.Println(res7) // >>> [7 4]
+	// STEP_END
+
+	// Output:
+	// OK
+	// OK
+	// [7]
+	// [7 4]
+}
+
+func ExampleClient_tdigquant() {
+	ctx := context.Background()
+
+	rdb := redis.NewClient(&redis.Options{
+		Addr:     "localhost:6379",
+		Password: "", // no password docs
+		DB:       0,  // use default DB
+	})
+
+	// REMOVE_START
+	rdb.Del(ctx, "racer_ages")
+	// REMOVE_END
+
+	_, err := rdb.TDigestCreate(ctx, "racer_ages").Result()
+
+	if err != nil {
+		panic(err)
+	}
+
+	_, err = rdb.TDigestAdd(ctx, "racer_ages",
+		45.88, 44.2, 58.03, 19.76, 39.84, 69.28,
+		50.97, 25.41, 19.27, 85.71, 42.63,
+	).Result()
+
+	if err != nil {
+		panic(err)
+	}
+
+	// STEP_START tdig_quant
+	res8, err := rdb.TDigestQuantile(ctx, "racer_ages", 0.5).Result()
+
+	if err != nil {
+		panic(err)
+	}
+
+	fmt.Println(res8) // >>> [44.2]
+
+	res9, err := rdb.TDigestByRank(ctx, "racer_ages", 4).Result()
+
+	if err != nil {
+		panic(err)
+	}
+
+	fmt.Println(res9) // >>> [42.63]
+	// STEP_END
+
+	// Output:
+	// [44.2]
+	// [42.63]
+}
+
+func ExampleClient_tdigmin() {
+	ctx := context.Background()
+
+	rdb := redis.NewClient(&redis.Options{
+		Addr:     "localhost:6379",
+		Password: "", // no password docs
+		DB:       0,  // use default DB
+	})
+
+	// REMOVE_START
+	rdb.Del(ctx, "racer_ages")
+	// REMOVE_END
+
+	_, err := rdb.TDigestCreate(ctx, "racer_ages").Result()
+
+	if err != nil {
+		panic(err)
+	}
+
+	_, err = rdb.TDigestAdd(ctx, "racer_ages",
+		45.88, 44.2, 58.03, 19.76, 39.84, 69.28,
+		50.97, 25.41, 19.27, 85.71, 42.63,
+	).Result()
+
+	if err != nil {
+		panic(err)
+	}
+
+	// STEP_START tdig_min
+	res10, err := rdb.TDigestMin(ctx, "racer_ages").Result()
+
+	if err != nil {
+		panic(err)
+	}
+
+	fmt.Println(res10) // >>> 19.27
+
+	res11, err := rdb.TDigestMax(ctx, "racer_ages").Result()
+
+	if err != nil {
+		panic(err)
+	}
+
+	fmt.Println(res11) // >>> 85.71
+	// STEP_END
+
+	// Output:
+	// 19.27
+	// 85.71
+}
+
+func ExampleClient_tdigreset() {
+	ctx := context.Background()
+
+	rdb := redis.NewClient(&redis.Options{
+		Addr:     "localhost:6379",
+		Password: "", // no password docs
+		DB:       0,  // use default DB
+	})
+
+	// REMOVE_START
+	rdb.Del(ctx, "racer_ages")
+	// REMOVE_END
+	_, err := rdb.TDigestCreate(ctx, "racer_ages").Result()
+
+	if err != nil {
+		panic(err)
+	}
+
+	// STEP_START tdig_reset
+	res12, err := rdb.TDigestReset(ctx, "racer_ages").Result()
+
+	if err != nil {
+		panic(err)
+	}
+
+	fmt.Println(res12) // >>> OK
+	// STEP_END
+
+	// Output:
+	// OK
+}