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- ;;;; A Data Set Prototype
- (defproto data-set-proto '(data title))
-
- (defmeth data-set-proto :isnew (data &key title)
- (send self :data data)
- (if title (send self :title title)))
-
- (defmeth data-set-proto :title (&optional (title nil set))
- "Method args: (&optional title)
- Sets or retrieves the object's title."
- (if set (setf (slot-value 'title) title))
- (slot-value 'title))
-
- (defmeth data-set-proto :data (&optional (data nil set))
- "Method args: (&optional data)
- Sets or retrieves the object's data."
- (if set (setf (slot-value 'data) data))
- (slot-value 'data))
-
- (defmeth data-set-proto :describe (&optional (stream t))
- "Method args: (&optional (stream t))
- Prints a simple description of the object to STREAM."
- (let ((title (send self :title))
- (data (send self :data)))
- (format stream "This is ~a~%" title)
- (format stream "The sample mean is ~g~%" (mean data))
- (format stream "The sample standard deviation is ~g~%"
- (standard-deviation data))))
-
- (defmeth data-set-proto :plot () (histogram (send self :data)))
-
- (send data-set-proto :title "a data set")
-
- (defun make-data-set (x &key (title "a data set") (print t))
- (let ((object (send data-set-proto :new x :title title)))
- (if print (send object :describe))
- object))
-
- ;;;; A Time Series Prototype
- (defproto time-series-proto () () data-set-proto)
-
- (defmeth time-series-proto :plot ()
- (let ((data (send self :data)))
- (plot-points (iseq 0 (- (length data) 1)) data)))
-
- (defmeth time-series-proto :describe (&optional (stream t))
- (call-next-method stream)
- (format stream
- "The autocorrelation is ~g~%"
- (autocorrelation (send self :data))))
-
- (defun autocorrelation (x)
- (let* ((n (length x)))
- (/ (sum (* (select x (iseq 0 (- n 2)))
- (select x (iseq 1 (- n 1)))))
- (sum (* x x)))))
-
- (send time-series-proto :title "a time series")
-
- (defun make-time-series (x &key (title "a data set") (print t))
- (let ((object (send time-series-proto :new x :title title)))
- (if print (send object :describe))
- object))
-
- ;;;; A Rectangular Data Set Prototype
- (defproto rect-data-proto '(labels) () data-set-proto)
-
- (defmeth rect-data-proto :isnew (data &key title labels)
- (let ((n (length data)))
- (send self :data data)
- (if title (send self :title title))
- (send self :labels
- (if labels
- labels
- (mapcar #'(lambda (x) (format nil "X~a" x))
- (iseq 0 (- n 1)))))))
-
- (defmeth rect-data-proto :labels (&optional (labels nil set))
- (if set (setf (slot-value 'labels) labels))
- (slot-value 'labels))
-
- (send rect-data-proto :title "a rectangular data set")
-
- ;;;; A Data Set Instance
- (setf x (send data-set-proto :new (chisq-rand 20 5)))
-
- ;;;; A Time Series Instance
- (setf y (send time-series-proto :new
- (let ((e (normal-rand 21)))
- (+ (select e (iseq 1 20))
- (* .6 (select e (iseq 0 19)))))))
-
- ;;;; A Rectangular Data Set Instance
- (setf z (send rect-data-proto :new (uniform-rand '(20 20 20 20))))
-