ROC-AT-CUTOFF(1)

💖 ROC-AT-CUTOFF(1) 💖

okay bestie, welcome to roc-at-cutoff.pl — it lives in the User Contributed Perl Documentation corner of the manual-verse, and it's here to compute ROC / sensitivity / specificity at various / all thresholds. no cap. let's get into it 🦋

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✨ NAME ✨

roc-at-cutoff.pl — computes ROC/sensitivity/specificity at various/all thresholds. it's giving statistics girlie and she ate 💅

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🌸 SYNOPSIS 🌸

cbtest.pl <input1> [input2 ...]

periodt. that's the invocation, exactly as written, don't come for me 🙈

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🎀 OPTIONS 🎀

so your input file should be some alignment that has a matching .rocr file (presumably generated by filter.pl --rocr). the output gets graphed to <basename>.cutoff.roc.png. iconic.

ngl, sensitivity/specificity needs a false negative count, which means it needs a .filterstats file. like it literally cannot do the thing without it. 🫶

then we have all the other options, bestie:

• --stat|predictor|x — specifies what stat to use as a predictor. pick your main character stat ✨
• --samples|n — sets number of samples (default is sample at each possible cutoff)
• --maxsamples|maxn — sets a max for n/samples
• --clean — forces a re-sampling of the .rocr file. fresh start energy 💅
• --log — can apply log scale to x or y or xy axes
• --fn — can specify a FN count for calculating sensitivity
• --avg — preload averages (normally found from filterstats)
  • (note: averages are not drawn by default, so specify --avg (with no args) to enable them) — lowkey sneaky but okay 👑
• --noavg — don't plot the line for averages
• --lwd — can specify line weight
• --format — can specify output file format (default png)
• --pdf — set format to pdf
• --nofstats — disable searching for filterstats statistics
• --nofn — pretend not to have fn statistics (ie: skip sensitivity)
• --fstats — specify the filterstats file to use

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and that's the whole vibe check, bestie. this page was brought to you by perl v5.40.1, dated 2026-08-12 — so you know it's fresh, fr fr 💖✨🎀🦋