FileIO Examples
JSON - Write to File
using SignalTables
sigTable = getSignalTableExample("VariousTypes")
writeSignalTable("VariousTypes_prettyPrint.json", sigTable; indent=2, log=true)
writeSignalTable("VariousTypes_compact.json" , sigTable)results in the following files
JSON - Write to String
using SignalTables
str = signalTableToJSON( getSignalTableExample("VariousTypes") )
println(str)results in the following print output
"{\"_class\":\"SignalTable\",\"time\":{\"_class\":\"Var\",\"values\":[0.0,0.1,0.2,0.3,0.4,0.5],\"unit\":\"s\",\"independent\":true},\"load.r\":{\"_class\":\"Var\",\"values\":{\"_class\":\"Array\",\"eltype\":\"Float64\",\"size\":[6,3],\"values\":[0.0,0.09983341664682815,0.19866933079506122,0.29552020666133955,0.3894183423086505,0.479425538604203,1.0,0.9950041652780258,0.9800665778412416,0.955336489125606,0.9210609940028851,0.8775825618903728,0.0,0.09983341664682815,0.19866933079506122,0.29552020666133955,0.3894183423086505,0.479425538604203]},\"unit\":\"m\"},\"motor.angle\":{\"_class\":\"Var\",\"values\":[0.0,0.09983341664682815,0.19866933079506122,0.29552020666133955,0.3894183423086505,0" ⋯ 533 bytes ⋯ ",\"info\":\"Reference angle and speed\"},\"wm\":{\"_class\":\"Var\",\"values\":[1.0,0.9950041652780258,0.9800665778412416,0.955336489125606,0.9210609940028851,0.8775825618903728],\"unit\":\"rad/s\",\"alias\":\"motor.w\"},\"ref.clock\":{\"_class\":\"Var\",\"values\":[true,null,null,true,null,null],\"variability\":\"clock\"},\"motor.w_c\":{\"_class\":\"Var\",\"values\":[0.6,null,null,0.8,null,null],\"variability\":\"clocked\",\"clock\":\"ref.clock\"},\"motor.inertia\":{\"_class\":\"Par\",\"value\":{\"_class\":\"Number\",\"type\":\"Float32\",\"value\":0.02},\"unit\":\"kg*m/s^2\"},\"motor.data\":{\"_class\":\"Par\",\"value\":\"resources/motorMap.json\"},\"attributes\":{\"_class\":\"Par\",\"info\":\"This is a test signal table\"}}"Such a string could be communicated to a web browser.
JLD (HDF5) - Write to File
JLD stores Julia objects in HDF5 format, hereby additional attributes are stored to preserve type information.
using SignalTables
using FileIO
sigTable = getSignalTableExample("VariousTypes")
save( File(format"JLD", "VariousTypes.jld"), sigTable)results in the following file:
CSV - Read from File
All Julia tables that are derived from Tables.jl are seen as signal tables. For example, a CSV Files is read from file and treated as signal Table:
using SignalTables
import CSV
file = joinpath(SignalTables.path, "examples", "fileIO", "Rotational_First.csv")
println("\n... Read csv file \"$file\"")
sigTable = CSV.File(file)
println("\n... Show csv file as signal table")
showInfo(sigTable)
println("\ntime[1:10] = ", getSignal(sigTable, "time")[:values][1:10])results in the following output:
... Read csv file "[...]\SignalTables\examples\fileIO\Rotational_First.csv"
... Show csv file as signal table
name unit size eltypeOrType kind attributes
───────────────────────────────────────────────────────────────
time (2002,) Float64 Var
damper.phi_rel (2002,) Float64 Var
damper.w_rel (2002,) Float64 Var
inertia3.phi (2002,) Float64 Var
inertia3.w (2002,) Float64 Var
time[1:10] = [0.0, 0.0005, 0.001, 0.0015, 0.002, 0.0025, 0.003, 0.0035, 0.004, 0.0045000000000000005]