tests/docs: update tests and vignette wrt updated user message

Author: Florence Bockting

tests/testthat/_snaps/loo_subsampling_cases.md

@@ -4,8 +4,8 @@
       print(looss_1)
     Output
       
-      Computed from 4000 by 100 subsampled log-likelihood
-      values from 3020 total observations.
+      Subsampling loo uses 1) faster, more biased computation with 3020 log-lik.
+      terms, and 2) slower, more accurate computation with 100 subsampled terms.
       
                Estimate   SE subsampling SE
       elpd_loo  -1968.5 15.6            0.3
@@ -24,8 +24,8 @@
       print(looss_1b)
     Output
       
-      Computed from 4000 by 200 subsampled log-likelihood
-      values from 3020 total observations.
+      Subsampling loo uses 1) faster, more biased computation with 3020 log-lik.
+      terms, and 2) slower, more accurate computation with 200 subsampled terms.
       
                Estimate   SE subsampling SE
       elpd_loo  -1968.3 15.6            0.2
@@ -44,7 +44,7 @@
       print(aploo_1)
     Output
       
-      Computed from 2000 by 3020 log-likelihood matrix.
+      Computed from 2000 posterior draws and 3020 log-likelihood terms.
       
                Estimate   SE
       elpd_loo  -1968.4 15.6
@@ -64,8 +64,8 @@
       print(looapss_1)
     Output
       
-      Computed from 2000 by 100 subsampled log-likelihood
-      values from 3020 total observations.
+      Subsampling loo uses 1) faster, more biased computation with 3020 log-lik.
+      terms, and 2) slower, more accurate computation with 100 subsampled terms.
       
                Estimate   SE subsampling SE
       elpd_loo  -1968.2 15.6            0.4
@@ -85,8 +85,8 @@
       print(looss_2)
     Output
       
-      Computed from 4000 by 100 subsampled log-likelihood
-      values from 3020 total observations.
+      Subsampling loo uses 1) faster, more biased computation with 3020 log-lik.
+      terms, and 2) slower, more accurate computation with 100 subsampled terms.
       
                Estimate   SE subsampling SE
       elpd_loo  -1952.0 16.2            0.2

tests/testthat/test_loo_subsampling_cases.R

@@ -178,10 +178,10 @@ test_that("Test loo_subsampling and loo_approx with radon data", {
     print(loo_ss),
     "Posterior approximation correction used\\."
   ))
-  expect_output(print(loo_ss), "subsampled log-likelihood terms")
+  expect_output(print(loo_ss), "Subsampling loo uses 1) faster,")
 
   expect_output(print(loo_ap_ss), "Posterior approximation correction used\\.")
-  expect_output(print(loo_ap_ss), "subsampled log-likelihood terms")
+  expect_output(print(loo_ap_ss), "Subsampling loo uses 1) faster,")
 
   expect_output(
     print(loo_ap_ss_full),
@@ -369,11 +369,8 @@ test_that("Test the vignette", {
       loo_approximation_draws = 100
     )
   )
-  expect_output(
-    print(looss_2),
-    "faster but more biased computation with 4000 posterior draws and 3020 log-likelihood terms"
-  )
-  expect_output(print(looss_2), "slower but more accurate computation with 4000 posterior draws and 100 subsampled log-likelihood terms")
+  expect_output(print(looss_2), "Subsampling loo uses 1) faster,")
+  expect_output(print(looss_2), "Subsampling loo uses 1) faster,")
   expect_output(
     print(looss_2),
     "MCSE and ESS estimates assume independent draws"

vignettes/loo2-large-data.Rmd

@@ -188,8 +188,8 @@ print(loo_ss_1)
 ```
 
 ```
-Computed from 4000 posterior draws and 100 subsampled log-likelihood
-terms from 3020 total observations.
+Subsampling loo uses 1) faster, more biased computation with 3020 log-lik.
+terms, and 2) slower, more accurate computation with 100 subsampled terms.
 
          Estimate   SE subsampling SE
 elpd_loo  -1968.5 15.6            0.3
@@ -235,13 +235,13 @@ loo_ss_1b <-
     r_eff = r_eff,
     draws = parameter_draws_1,
     data = stan_df_1
-  ) 
+  )
 print(loo_ss_1b)
 ```
 
 ```
-Computed from 4000 posterior draws and 200 subsampled log-likelihood
-terms from 3020 total observations.
+Subsampling loo uses 1) faster, more biased computation with 3020 log-lik.
+terms, and 2) slower, more accurate computation with 200 subsampled terms.
 
          Estimate   SE subsampling SE
 elpd_loo  -1968.3 15.6            0.2
@@ -285,8 +285,8 @@ print(loo_ss_1c)
 
 
 ```
-Computed from 4000 posterior draws and 100 subsampled log-likelihood
-terms from 3020 total observations.
+Subsampling loo uses 1) faster, more biased computation with 3020 log-lik.
+terms, and 2) slower, more accurate computation with 100 subsampled terms.
 
          Estimate   SE subsampling SE
 elpd_loo  -1968.9 15.4            0.5
@@ -375,8 +375,8 @@ print(loo_ap_ss_1)
 ```
 
 ```
-Computed from 2000 posterior draws and 100 subsampled log-likelihood
-terms from 3020 total observations.
+Subsampling loo uses 1) faster, more biased computation with 3020 log-lik.
+terms, and 2) slower, more accurate computation with 100 subsampled terms.
 
          Estimate   SE subsampling SE
 elpd_loo  -1968.2 15.6            0.4
@@ -455,8 +455,8 @@ print(loo_ss_2)
 ```
 
 ```
-Computed from 4000 posterior draws and 100 subsampled log-likelihood
-terms from 3020 total observations.
+Subsampling loo uses 1) faster, more biased computation with 3020 log-lik.
+terms, and 2) slower, more accurate computation with 200 subsampled terms.
 
          Estimate   SE subsampling SE
 elpd_loo  -1952.0 16.2            0.2