add full DSl example to readme
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README.md
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README.md
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@ -13,19 +13,19 @@ Here is an example
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```
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```
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$ go run f.go
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$ go run f.go
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5000000 12000000
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5000000 12000000
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=> 5000000.0 12000000.0
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=> 5.0M 12.0M
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0.002 0.01
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* beta 1 200
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=> 13859.5 86583.4
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1.9K 123.1K
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30 180
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* 30 180
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=> 706832.8 9167656.0
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122.9K 11.7M
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/ 48 52
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/ 48 52
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=> 14139.1 183614.7
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2.5K 234.6K
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/ 5 6
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/ 5 6
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=> 2573.1 33632.0
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448.8 43.0K
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/ 6 8
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/ 6 8
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=> 368.4 4893.5
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64.5 6.2K
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/ 60
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/ 60
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=> 6.1 81.6
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1.1 103.7
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```
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```
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Perhaps this example is more understandable with comments and better units:
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Perhaps this example is more understandable with comments and better units:
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@ -33,25 +33,46 @@ Perhaps this example is more understandable with comments and better units:
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```
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```
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$ sed -u "s|#.*||" | sed -u 's|M|000000|g' | go run f.go
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$ sed -u "s|#.*||" | sed -u 's|M|000000|g' | go run f.go
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5M 12M # number of people living in Chicago
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5M 12M # number of people living in Chicago
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=> 5000000.0 12000000.0
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=> 5.0M 12.0M
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0.002 0.01 # fraction of people that have a piano
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* beta 1 200 # fraction of people that have a piano
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=> 13859.5 86583.4
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1.9K 123.1K
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30 180 # minutes it takes to tune a piano, including travel time
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30 180 # minutes it takes to tune a piano, including travel time
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=> 706832.8 9167656.0
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122.9K 11.7M
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/ 48 52 # weeks a year that piano tuners work for
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/ 48 52 # weeks a year pianotuners work for
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=> 14139.1 183614.7
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2.5K 234.6K
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/ 5 6 # days a week in which piano tuners work
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/ 6 8 # hours a day
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=> 2573.1 33632.0
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353.9 34.1K
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/ 6 8 # hours a day in which piano tuners work
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=> 368.4 4893.5
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/ 60 # minutes to an hour
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/ 60 # minutes to an hour
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=> 6.1 81.6
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5.9 568.3
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# ^ piano tuners in Chicago
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=: piano_tuners_in_Chicago
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piano_tuners_in_Chicago => 5.9 568.3
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```
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```
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You can see a recording in action here:
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Here is instead an example using beta distributions and variables:
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[![asciicast](https://asciinema.org/a/fygBtg0XDc1iVajArdQn9b9CA.svg)](https://asciinema.org/a/fygBtg0XDc1iVajArdQn9b9CA)
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```
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1 2
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=> 1.0 2.0
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* 1_000_000_000
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=> 1000.0M 2.0B
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=: x # assign to variable
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x => 1000.0M 2.0B
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. # clear the stack, i.e., make it be 1
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beta 1 2
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=> beta 1.0 2.0
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beta 12 300
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=> beta 13.0 302.0
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=. y # assign to variable and clear the stack (return it to 1)
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y => beta 13.0 302.0
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x
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=> 1000.0M 2.0B
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* y
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=> samples 31.3M 98.2M
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```
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The difference between `=: x` and `=. y` is that `=.` clears the stack after the assignment.
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## Installation
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## Installation
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@ -89,7 +110,9 @@ Note that these sed commands are just hacks, and won't parse e.g., `3.5K` correc
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## Tips & tricks
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## Tips & tricks
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Conceptually clearer to have all the multiplications first and then all the divisions
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- It's conceptually clearer to have all the multiplications first and then all the divisions
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- Sums and divisions now also supported
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- For things between 0 and 1, consider using a beta distribution
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## Roadmap
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## Roadmap
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@ -116,20 +139,9 @@ Conceptually clearer to have all the multiplications first and then all the divi
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- Maps
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- Maps
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- Joint types
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- Joint types
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- Enums
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- Enums
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- [ ] Fix correlation problem, by spinning up a new randomness thing every time some serial computation is done.
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- [x] Fix correlation problem, by spinning up a new randomness thing every time some serial computation is done.
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- [ ] Dump samples to file
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- [ ] Represent samples/statistics in some other way
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- [ ] Perhaps use qsort rather than full sorting
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Some possible syntax for a more expressive stack-based DSL
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Some possible syntax for a more expressive stack-based DSL (now implemented)
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```
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1B to 20B
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* 1 to 100
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/ beta 1 2 # or b 1 2
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=: x # content of the stack at this point saved into x
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1 to 10
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10 to 100
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=: y # content of the stack at this point saved into y
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x # put x on the stack
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- y # substract y from the content of the stack. Requires interpreting x and y as list of samples
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```
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1
f.go
1
f.go
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@ -301,6 +301,7 @@ func prettyPrintDist(dist Dist) {
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low := tmp_xs[low_int]
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low := tmp_xs[low_int]
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high_int := N_SAMPLES * 19 / 20
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high_int := N_SAMPLES * 19 / 20
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high := tmp_xs[high_int]
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high := tmp_xs[high_int]
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fmt.Printf("=> samples ")
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prettyPrint2Floats(low, high)
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prettyPrint2Floats(low, high)
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case Beta:
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case Beta:
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fmt.Printf("=> beta ")
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fmt.Printf("=> beta ")
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