'P nr' computer keyboard layout

31 December 2017
Canonical namep_nr.en.matrix
LanguageEnglish
Form factorSlab : Matrix
'Author'Amuseum
Author data may not be correct, we're working on it.
Keys horizontally staggeredNo
Letters on thumb6
Uses AltGr for standard charactersYes
Moves non-character keys (ANSI/ISO)No
Changes 'shift' pairsYes
Changes top row (ANSI/ISO)No
Uppercase on different keyYes

Click image for larger view

p_nr.en.matrix


Download the Keyboard Layout Analyzer .json file.
Download the Keyboard Layout Editor .json file.

Rankings

MetricRankRelative %
KLA original English prose8480.19
KLA original Programming10067.86
Den 1 English prose4783.57
Den 1 Programming6881.89
Homekeys words2560.88
Homeblock words4517.05
Angle mod Homeblock words4417.05
Easyblock words327.74
One-handed words3156.43
Efficiency9882.44
Homekeys bigrams4078.34
Homekeys trigrams10554.08
Homekeys quadgrams14528.02
Homekeys common words5368.80
Samefinger bigrams155 4.62
Overall ranking5652.51

Finger based metrics

Finger based metrics, as determined with Keyboard Layout Analyzer, using Patrick's original scoring model, and Den's first revised version.

We show the ranking Overall, for the broad Form Factor, and against other similar layouts (Peers), for English prose, assorted Programming, and Average of the two.

'Peers' means compared to other layouts with same characterics, e.g. ANSI/ISO vs Ergo, and matching 'Has letters on thumb', 'Uses AltGr for standard characters', 'Moves non-character keys (ANSI/ISO)', 'Changes shift pairs', 'Changes top row (ANSI/ISO)', and 'Uppercase on different key', as listed above.

 OverallOverallOverall ErgoErgoErgo PeersPeersPeers
Scoring modelEnglish proseProgrammingCombined English proseProgrammingCombined English proseProgrammingCombined
KLA original84 / 360100 / 36091 / 36067 / 10879 / 10872 / 1085 / 55 / 55 / 5
Den 147 / 36068 / 36049 / 36045 / 10860 / 10845 / 1083 / 55 / 53 / 5

English Word-based analysis

Home Keys Analysis

The Home Keys for this layout are shown with red dots in the image above, giving the following letters:

abehijnst

Home key bigrams, trigrams, quadgrams and common words

Scores are based on which fingers are used for the top 20 bigrams, trigrams and quadgrams, and top 30 common words, with the scores weighted by strength of finger used, and frequency of occurance of the text.

MetricRankWeighted scoreComponents handled and not handled
Bigrams4070.64 / 90.17th he in an en at ha it is hi es er re nd on ou ed to or ng
Trigrams10521.46 / 39.68the hat his tha ent ith thi and ing her ere for ion ter was you ver all wit tio
Quadgrams1454.45 / 15.88that this thin ther with tion here ould ight have hich whic they atio ever from ough were hing ment
Common words5358.1 / 84.45the a in is that he it as at his be this an has of and to for was on with by from are I but have not they or
Home Key lettersEnglish words typeableLongest wordExample
jeainhtsb152316heathenishnesses

Word count
Word length

Easyblock Analysis

The typical Easyblock Keys for this layout form factor are shown here:
Easyblock lettersEnglish words typeableLongest wordExample
oOlLcCeEaAiIhHtTsSmMnN1468519sentimentalisations

Word count
Word length

Homeblock Analysis

The typical Homeblock Keys for this layout form factor are shown here:
Homeblock lettersEnglish words typeableLongest wordExample
oOuUdDlLcCeEaAiIhHtTsSmMwWgGnN4658822constitutionalisations

Word count
Word length

Angle Mod Homeblock Analysis

The typical Angle Mod Homeblock Keys for this layout form factor are shown here:
Angle mod Homeblock lettersEnglish words typeableLongest wordExample
oOuUdDlLcCeEaAiIhHtTsSmMwWgGnN4658822constitutionalisations

Word count
Word length

One-handed words Analysis

This looks at how many words can be typed with only left or right hand. We want these numbers to be low.
This metric was done "strictly" ... shifted or AltGr letters were only included if Shift or AltGr was on the same hand.
Note: we exclude the Dvorak one-handed layouts comparison, since clearly by design they can type every possible word with one hand.
Left hand lettersLeft wordsLongest left wordLeft exampleRight hand lettersRight wordsLongest right wordRight exampleTotal
oujeaiqxp1058epopoeia fdlczyhtsbkmwgvnr1757glycyls 280

Left handRight hand
Word count
Word lengthWord length

SameFinger Bigrams

This is a weighted analysis of same-finger usage.

The probability that a letter will follow another given letter is used to evaluate layouts by which letters pairs are on the same fingers. We multiply this figure by the percentage frequency of the first letter, in English.
We add the probabilities in both directions, for example "er" and "re".

There are some exceptions: We only look at lower case, and if the second letter is on the same key as the first, we ignore that pair.

The idea is to see how much a finger has to fly around, and if the two letters are on the same key (as in the split-case layouts) then it doesn't have to fly between them.

The metric does not measure how far the finger has to fly, just that it has to. I'll look at adding distance, row jumps, inward rolls, outward rolls, to this metric if possible.

FingerLettersScore
Left pinky'jq' 0
Left ring'e' 0
Left middle'oa' 5.4108
Left index'uix' 12.1096
Left thumb'p⍽' 73.1255
Right thumb'nr' 14.9595
Right index'fdyhkm' 24.2577
Right middle'ltw' 26.4525
Right ring'csg' 16.6922
Right pinky'zbv' 0.284
Both thumbs'' 0
Total 173.29

Word metric comparisons

MetricLowestLowest scorep_nr.en.matrix scoreHighestHighest score
Home keysabcdef.en.ansi31523
essie-2.en.matrix174012
Easyblockqwerty-rehomed.en.ansi10014685
essie-3-wip.en.ergolinear189738
Homeblockqwerty-typewriter.en.ansi156246588
essie-3-wip.en.ergolinear273265
Angle mod Homeblockalphametric.en.ansi135446588
essie-3-wip.en.ergolinear273265
Left hand wordsqgmlwy.en.ergolinear34105
tnwmlc.en.ansi22157
Right hand wordsessie-3.en.ergolinear26175
reverse-qwerty.en.ansi14771
Total single handedessie-3.en.ergolinear158280
tnwmlc.en.ansi22301
Average single handedessie-3.en.ergolinear79140
tnwmlc.en.ansi11150.5
Same finger bigramsseelpy-1.en.ergolinear8.01173.29
mcgunnigle-peoples.en.ansi1757.11

Fraser Street analysis

"Fraser Street" (thanks Shai) is a specially-crafted text in which most of the words are typed with only the left hand, on the QWERTY layout.
It was designed to highlight how much better the Dvorak layout is at hand alternation.
We ignore spaces and punctuation.

Left lettersRight lettersNeeds both hands
oujeaiqxpfdlczyhtsbkmwgvnrABCDEFGHIJKLMNOPQRSTUVWXYZ

Fraser Street was in West Everett. Westward of Fraser Street was the great vast sea. Awed, we gazed seawards, attracted by crested waves which raced and ebbed. Children were scattered on the beach edged and strewed with seaweed. They waded in water as the sea surged in and retreated. They bagged crabs as eagerly as beavers saw trees. Brave crews, seafarers in fact, steered sea craft far away. The site of Fraser Street was not overrated.

Few vegetated in Fraser Street. Nobody wasted time abed. "Acts test the breed," was ever the sacred adage. Varied crafts and trades were represented. There was a caterer, a barber, a weaver, a cabaret, and a garage. Attracted, we started to see several scenes. We were greeted as friends.

The barber catered to a varied trade, representing diverse careers and different creeds. Saturday drew the best crowd. All were seated, relaxed, aware of fewer cares, less fagged. There we saw a few starved tattered beggars who bragged of "bracers" served at cafes after a wee meal of beef stew and cabbage. A better fare was reserved for those reared on earth's greater awards.

Fraser Street summary

Left letters typed337
Right letters typed515
Needs both hands29
Total letters typed881
Switches589
Hand balance38.25 : 3.29 : 58.46

Typing lessons

Download some English words suitable for learning the layout.
Note if any files are empty it's because there are not enough words to create a lesson. This is most noticeable in the bad layouts.

Week 1Homekey words Day 1 Day 2 Day 3 Day 4 Day 5
Week 2Easyblock words Day 1 Day 2 Day 3 Day 4 Day 5
Week 3Homeblock words Day 1 Day 2 Day 3 Day 4 Day 5
Week 4Common / tricky words Day 1 Day 2 Day 3 Day 4 Day 5
Week 5Pangrams Day 1 Day 2 Day 3 Day 4 Day 5
Week 6So you think you can type? Day 1 Day 2 Day 3 Day 4 Day 5
Week 7Extra practice 1: Common words in text Day 1 Day 2 Day 3 Day 4 Day 5
Week 8Extra practice 2: Lorem ipsum and friends Day 1 Day 2 Day 3 Day 4 Day 5
Week 9Extra practice 3: Underused words Day 1 Day 2 Day 3 Day 4 Day 5