From 48b3ee71a853a4c2a060d8c933f7aba053024975 Mon Sep 17 00:00:00 2001 From: Andrew Ghazi <6763470+andrewGhazi@users.noreply.github.com> Date: Fri, 4 Oct 2024 13:02:31 -0400 Subject: [PATCH] wording --- episodes/large_data.Rmd | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/episodes/large_data.Rmd b/episodes/large_data.Rmd index 4bc0ab1..d803b5a 100644 --- a/episodes/large_data.Rmd +++ b/episodes/large_data.Rmd @@ -359,11 +359,11 @@ accurate, though RSVD is much faster for file-backed matrices. :::: challenge -The uncertainty from approximation error is sometimes psychologically -objectionable. "Why can't my computer just give me the right answer?" One way to -alleviate this feeling is to quantify the approximation error on a small test -set like the sce we have here. Using the `ExactParam()` class, visualize the -error in PC1 coordinates compared to the RSVD results. +The uncertainty from approximation error is sometimes aggravating. "Why can't my +computer just give me the right answer?" One way to alleviate this feeling is to +quantify the approximation error on a small test set like the sce we have here. +Using the `ExactParam()` class, visualize the error in PC1 coordinates compared +to the RSVD results. ::: solution This code block calculates the exact PCA coordinates. Another thing to note: PC vectors are only identified up to a sign flip. We can see that the RSVD PC1 vector points in the