HP 48gII hp 48gII_user's manual_English_E_HDPMSG48E67_V2.pdf - Page 736
PICT, PDIM, LINE, calculator screen has 131 pixels by 64 pixels, i.e., the minimum size
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PICT This soft key refers to a variable called PICT that stores the current contents of the graphics window. This variable name, however, cannot be placed within quotes, and can only store graphics objects. In that sense, PICT is like no other calculator variables. PDIM The function PDIM takes as input either two ordered pairs (xmin,ymin) (xmax,ymax) or two binary integers #w and #h. The effect of PDIM is to replace the current contents of PICT with an empty screen. When the argument is (xmin,ymin) (xmax,ymax), these values become the range of the user-defined coordinates in PPAR. When the argument is #w and #h, the ranges of the user-defined coordinates in PPAR remain unchanged, but the size of the graph changes to #h × #v pixels. PICT and the graphics screen PICT, the storage area for the current graph, can be thought of as a two dimensional graph with a minimum size of 131 pixels wide by 64 pixels high. The maximum width of PICT is 2048 pixels, with no restriction on the maximum height. A pixel is each one of the dots in the calculator's screen that can be turned on (dark) or off (clear) to produce text or graphs. The calculator screen has 131 pixels by 64 pixels, i.e., the minimum size for PICT. If your PICT is larger than the screen, then the PICT graph can be thought of as a two dimensional domain that can be scrolled through the calculator's screen, as illustrated in the diagram shown next. LINE This command takes as input two ordered pairs (x1,y1) (x2, y2), or two pairs of pixel coordinates {#n1 #m1} {#n2 #m2}. It draws the line between those coordinates. TLINE This command (Toggle LINE) takes as input two ordered pairs (x1,y1) (x2, y2), or two pairs of pixel coordinates {#n1 #m1} {#n2 #m2}. It draws the line between those coordinates, turning off pixels that are on in the line Page 22-20
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