Returns the path <cache_dir>/SIU.csv, creating
cache_dir if needed. Default is file.path(tempdir(),
"morie", "siu"); pass morie_cache_dir("siu") for persistent
caching.
Examples
p <- morie_siu_cache_path(tempfile("siu_demo_"))
p
#> [1] "/tmp/Rtmp7fqYDy/siu_demo_2e51141c5fd5/SIU.csv"