'X7.2h' computer keyboard layout

31 December 2017
Canonical namex7-2h.en.ergolinear
LanguageEnglish
Form factorSplit : Ergolinear
InventorIan Douglas
Keys horizontally staggeredNo
Letters on thumb2
Uses AltGr for standard charactersYes
Moves non-character keys (ANSI/ISO)No
Changes 'shift' pairsYes
Changes top row (ANSI/ISO)No
Uppercase on different keyNo

Click image for larger view

x7-2h.en.ergolinear


Download the Keyboard Layout Analyzer .json file.

Rankings

MetricRankRelative %
KLA original English prose2485.63
KLA original Programming4481.43
Den 1 English prose5182.92
Den 1 Programming4088.58
Homekeys words2620.83
Homeblock words561.81
Angle mod Homeblock words561.81
Easyblock words615.65
One-handed words3352.32
Efficiency10181.95
Homekeys bigrams4675.24
Homekeys trigrams6860.36
Homekeys quadgrams14229.91
Homekeys common words4570.38
Samefinger bigrams152 4.69
Overall ranking2760.12

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 original24 / 36044 / 36028 / 36019 / 10834 / 10820 / 1082 / 166 / 163 / 16
Den 151 / 36040 / 36042 / 36048 / 10837 / 10839 / 10814 / 1610 / 1613 / 16

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:

aehiknst

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
Bigrams4667.84 / 90.17th he in an en at ha it is hi es er re nd on ou ed to or ng
Trigrams6823.95 / 39.68the hat his tha ent ith thi and ing her ere for ion ter was you ver all wit tio
Quadgrams1424.75 / 15.88that this thin ther with tion here ould ight have hich whic they atio ever from ough were hing ment
Common words4559.44 / 84.45the a in is that he it as at his this an has of and to for was on with by be from are I but have not they or
Home Key lettersEnglish words typeableLongest wordExample
ieatnskh144316heathenishnesses

Word count
Word length

Easyblock Analysis

The typical Easyblock Keys for this layout form factor are shown here:
Easyblock lettersEnglish words typeableLongest wordExample
yYoOrRcCiIeEaAtTnNsSgGdDHh2968521adrenocorticosteroids

Word count
Word length

Homeblock Analysis

The typical Homeblock Keys for this layout form factor are shown here:
Homeblock lettersEnglish words typeableLongest wordExample
yYoOuUmMrRcCiIeEaAtTnNsSpPgGdDlLfFHh16891332dichlorodiphenyltrichloroethanes

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
yYoOuUmMrRcCiIeEaAtTnNsSpPgGdDlLfFHh16891332dichlorodiphenyltrichloroethanes

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
qyouieajpg2498epopoeia bmrczwtnskvdlfx537tsktsks 302

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'q' 0
Left ring'yip' 21.8786
Left middle'oe' 7.8385
Left index'uajg' 77.1776
Left thumb'⍽h' 0
Right thumb'' 0
Right index'bmwtvd' 20.2489
Right middle'rnl' 30.4865
Right ring'csf' 13.0481
Right pinky'zkx' 0.0192
Both thumbs'' 0
Total 170.7

Word metric comparisons

MetricLowestLowest scorex7-2h.en.ergolinear scoreHighestHighest score
Home keysabcdef.en.ansi31443
essie-2.en.matrix174012
Easyblockqwerty-rehomed.en.ansi10029685
essie-3-wip.en.ergolinear189738
Homeblockqwerty-typewriter.en.ansi1562168913
essie-3-wip.en.ergolinear273265
Angle mod Homeblockalphametric.en.ansi1354168913
essie-3-wip.en.ergolinear273265
Left hand wordsqgmlwy.en.ergolinear34249
tnwmlc.en.ansi22157
Right hand wordsessie-3.en.ergolinear2653
reverse-qwerty.en.ansi14771
Total single handedessie-3.en.ergolinear158302
tnwmlc.en.ansi22301
Average single handedessie-3.en.ergolinear79151
tnwmlc.en.ansi11150.5
Same finger bigramsseelpy-1.en.ergolinear8.01170.7
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
qyouieajpgbmrczwtnskvdlfxhABCDEFGHIJKLMNOPQRSTUVWXYZ

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 typed364
Right letters typed468
Needs both hands49
Total letters typed881
Switches575
Hand balance41.32 : 5.56 : 53.12

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