add timestamp to measurements and delay start (dragoon/komodo!111)

- add a timestamp to all the measurements of the _diversity_ from `inbreeding/mod.rs`
- allow to delay the measurement starts with `--measurement-schedule-start`, to help completing already existing measurements

>  **Important**  
> existing measurement files will have to change shape from
> ```
> table<strategy: string, diversity: list<float>>
> ```
> to
> ```
> table<strategy: string, diversity: table<t: int, diversity: float>>
> ```

examples/inbreeding/mod.rs

@@ -114,7 +114,7 @@ where
     for t in 0..=max_t {
         if measurement_schedule(t) {
             let inbreeding = measure_inbreeding(&shards, k, nb_measurements, &mp, &sty, rng);
-            println!("{}", inbreeding);
+            println!("{}, {}", t, inbreeding);
         }
 
         // decode the data
@@ -164,7 +164,7 @@ where
 
         if measurement_schedule(t) {
             let inbreeding = measure_inbreeding(&shards, k, nb_measurements, &mp, &sty, rng);
-            println!("{}", inbreeding);
+            println!("{}, {}", t, inbreeding);
         }
 
         // recode a new random shard
@@ -220,6 +220,8 @@ struct Cli {
 
     #[arg(long)]
     measurement_schedule: usize,
+    #[arg(long)]
+    measurement_schedule_start: usize,
 }
 
 fn main() {
@@ -241,7 +243,10 @@ fn main() {
         "diversity will be measured every {} steps",
         cli.measurement_schedule
     );
-    let measurement_schedule = |t| t % cli.measurement_schedule == 0;
+    let measurement_schedule = |t| {
+        t >= cli.measurement_schedule_start
+            && (t - cli.measurement_schedule_start) % cli.measurement_schedule == 0
+    };
 
     match cli.test_case {
         TestCase::EndToEnd => {

scripts/inbreeding/plot.nu

@@ -54,7 +54,7 @@ export def main [data: path, --save: path, --options: record<k: int>] {
         }
         | update diversity {|it|
             let l = $it.diversity | length
-            $it.diversity | wrap y | merge (seq 0 $l | wrap x) | insert e 0
+            $it.diversity | insert e 0 | rename --column { t: "x", diversity: "y" }
         }
         | rename --column { diversity: "points" }
         | insert style {|it|

scripts/inbreeding/run.nu

@@ -10,6 +10,7 @@ export def main [
         nb_measurements: int,
         nb_scenarii: int,
         measurement_schedule: int,
+        measurement_schedule_start: int,
         max_t: int,
         strategies: list<string>,
         environment: string,
@@ -22,6 +23,7 @@ export def main [
             -n $options.n
             --nb-measurements $options.nb_measurements
             --measurement-schedule $options.measurement_schedule
+            --measurement-schedule-start $options.measurement_schedule_start
             -t $options.max_t
             --test-case end-to-end
         ] | lines | into float | save --force baseline.nuon
@@ -37,17 +39,25 @@ export def main [
                 -n $options.n
                 --nb-measurements $options.nb_measurements
                 --measurement-schedule $options.measurement_schedule
+                --measurement-schedule-start $options.measurement_schedule_start
                 -t $options.max_t
                 --test-case recoding
                 --strategy $s
                 --environment $options.environment
-            ] | lines | into float
+            ]
+                | lines
+                | parse "{t}, {diversity}"
+                | into float diversity
         }
 
         let diversity = $res
-            | skip 1
-            | reduce --fold $res.0 {|it, acc| $acc | zip $it | each { flatten }}
-            | each { math avg }
+            | flatten
+            | group-by t --to-table
+            | update items { get diversity | math avg }
+            | rename --column { group: "t", items: "diversity" }
+            | into int t # NOTE: $.t needs to be converted to int here because
+                         # `group-by --to-table` converts the grouping key to
+                         # string
 
         {
             strategy: $s,