Implement S4 classes

[emilopezcano]

S4 objects

spc

@DaTa (data.frame)
@controlchart: list of (type of chart). Each one a list: UCL, LCL, CL, sigma, nsigmas, points
@ctq (chart) If NULL -> rownames
@hlines
@flimits
@newrows
@controlledrows
@order
@special: list of: out, ...
@zones

@capability: list of: Target, USL, LSL, Indices (cp, cpk, cpm, ppk, ...)

When creating object: calculate limits

plot method: mark zones?, type, nsigmas,

sqc

For acceptance sampling

Methods

• Create object
• Fill @controlchart
• generic plot function